The investigation.

On this page, you will find information pertaining to the investigation period. Witness interviews and findings at each involved location will be summarized for ease of reading and comprehension. A full investigation timeline is also provided so you can see how the investigation unfolded chronologically. All of this information can be cross-referenced on the Official Evidence page, where you can view the official police reports, warrants, documents, photographic evidence, and more. 

*Please note that any information that could be relevant to Zach's appeal is being purposely withheld at this time on the direction of his appellate counsel.

  • interviews

    Anderson, Joshua

    ​Joshua identified himself as Zach's brother and that he went to Mequon PD on his own accord to see what was happening with Zach. He stated he talked to Zach on the phone about guys showing up at his house and after that Zach didn't answer his calls. He stated he then drove to Zach's house, but Zach was not there (because he was already in custody). Josh stated Sadie jerks Zach around with custody and that they have been off and on for years. He stated Zach still loves Sadie but doesn't get sad over her. He stated Sadie had a new boyfriend and Zach told him he was not a decent guy and he was not too keen on the guy. He stated that because Sadie had a new boyfriend, Zach went for custody. He stated he thought Sadie would have been served court paperwork but that Sadie currently had full custody of the kids. He stated Zach had been distant lately with everything going on and that he hadn't met Zach's new girlfriend. He stated Zach and Sol did a lot of work together and the three of them are pretty close, with him often acting as mediator between Sol and Zach when they argued. He stated Zach has back issues but is still able to do labor work. He stated Zach isn't the best at lifting and when their grandmother passed away 1 month prior, Zach didn't do much of the heavy lifting. He stated he did not observe any injuries on Zach recently. He stated he last saw Zach on 05/16/2020 at the farm, with Zenith, their dad, and Zach's kids. He stated he did not talk to Zach on 05/17/2020. 

    Josh was interviewed again and identified himself as the co-owner of Anderson Greenview Tree Farm, with his father, Barry. He stated he knew officers were interviewing him because Sadie's new boyfriend was missing. He stated everything he knows he has gotten from the media. He states Zach had mentioned Sadie dating someone and that Zach had used the WI CCAP website to get his background. He stated he last spoke to Zach on 05/19/2020 and they talked about fixing the house. He last saw Zach on 05/16/2020 when they met at his tree farm to plant trees. Josh stated he was familiar with a recent incident involving Zach's daughter and that police got involved. He stated Zach had injured his back while working for AT&T and that Zach is unable to do any heavy lifting. He stated he knew about the size of Sadie's missing boyfriend because he read it in an article and that the incident is all over Facebook, but he had never met her boyfriend in person. He stated he last was at Zach's home on 04/25/2020. He identified Zach's vehicles and stated he never used the minivan. He confirmed he knew Zach to have a chainsaw at his house. He stated he had never been to Kenosha and never had any conversations with Zach about going to Kenosha. He stated Zach loved Sadie but wasn't able to live with her. He stated the final straw of the relationship was when Zach gave Sadie money to pay for daycare and she used it to go to Mexico. He stated the last fire he had at the tree farm was 05/08/2020 and he called the Sheriff Department advising them of the burn beforehand. He stated since then, his father had been throwing things in the burn pit. Josh outlined the various tractors at the farm and stated he has no firearms.

    Anderson, o

    OA stated that on 05/16/20 Zach took her and her brothers to the Anderson Greenview Tree Farm and they left at about 4:30pm. She stated prior to leaving Zach placed his chainsaw in the back of the van. She stated she believed the carpet of the van at that time was in tact. She stated when they arrived to the tree farm, Zach hung out with his father, Barry, and drank White Claws while they planted pine trees. She stated they would be able to find where they were planting because there would be tire tracks down the main path. She stated they were at the farm for 2-3 hours and also present were Josh & Zenith. She stated that Zach never took the chainsaw out of the back of the van. She stated at the time Zach was wearing jeans, a white T-shirt, and a blue and white flannel that he wears all the time. She stated she believed the flannel was insulated. She stated Zach was also wearing flip flops and used his father's boots once he got to the tree farm.

    Anderson, Solomon

    Solomon identified himself as Zach's brother and stated they have a good relationship. He stated he owns a construction business and his "shop" and dumpster are located at Zach's home, so he frequents there for work. He stated Zach works with him on job sites occasionally, along with Andrew Schultz and Alex Weitzel. Solomon stated Sadie isn't stable and has falsely accused Zach of many things throughout their relationship, so they disagree frequently. Solomon stated he did not know Rosalio, but Zach had mentioned a guy Sadie had been seeing because he was upset about his children being around other men. He stated Zach did not care that Sadie was dating someone. He stated the last time he communicated with Zach was on 05/16/2020 at Zach's residence. Solomon stated Zach was supposed to play Dungeons & Dragons on 05/15/2020 but never showed up because he had a bonfire. He stated he went to Madison on 05/17/2020 to see his girlfriend, Jen Libers, and spent the next two days with her. He stated that his brother, Joshua Anderson, had told him on Tuesday that Zach was arrested after two men showed up at his house saying they were looking for him. Solomon stated he was concerned because Sadie had previously mentioned sending members of an unknown biker gang after Zach in the past. He confirmed the vehicles Zach owns and stated he hasn't driven Zach's van in over a month. Solomon stated he was told the missing person was 6'4" and 300 lbs from Josh. Solomon stated Zach wouldn't be able to move a person that size because of his bad back. Solomon mentioned an incident with Zach and Sadie's daughter recently, and that he was able to talk Zach out of involving themselves and allow the police to handle the situation. Solomon stated he was supposed to watch Zach's kids on Saturday, 05/16/2020, because Zach was going to go to Michigan, but the plans changed.

    Anderson, zenith

    Zenith identified herself as Zach's sister. She stated she lives in Texas and arrived in town on the birthday of Zach's daughter, OA, and attended a birthday party for her where OA told her she went to Sadie's one night with Zach and saw Sadie's boyfriend there. She stated that while she was at Sadie's for the birthday party, OA told her not to sit on the couch because Sadie's boyfriend "put boogers on it." She stated she also spoke with Sadie at the party and Sadie asked her if she knew anything about Zach stalking her but Zenith knew nothing. She stated Sadie denied having a boyfriend and it was only after the boyfriend went missing that Sadie brought up dating anyone to her. She stated she last spoke with Zach on 05/19/2020 and there was no talk about Sadie's boyfriend. She stated she would be surprised if Zach would ever involve the tree farm in anything.

    A second interview of Zenith was performed later. She stated she never knew Rosalio Gutierrez even existed and had no conversations with Zach about him. She stated she spoke with Sadie occasionally and Sadie mentioned something about tracking devices once. She stated she told Sadie she would talk to Zach about the devices but never got around to it. 

    barber, aimee

    Aimee identified herself as the ex-girlfriend of Solomon Anderson. She stated Solomon's comment about getting rid of a body on a pig farm was third hand information from people unacquainted to her at the time the comment was made. The acquaintance later relayed the comment to Aimee. She stated comment was made approximately two years ago.

    Barber, brian

    Brian identified himself as the brother of Solomon Anderson's ex-girlfriend, Aimee Barber. He stated Aimee had told him that approximately two years ago, Solomon had made a comment about getting rid of a body on a pig farm because there wouldn't be anything left over. He stated Aimee was scared of Zach and had described Zach as insane and feared that Zach would kill her if she spoke out. 

    bauer, Dennis

    Dennis stated he observed a white vehicle on the tree farm in early spring, maybe mid-April. He then stated he wasn't sure of the timeframe, but he remembers law enforcement being there and he believed it was a few weeks prior to that. 

    bender, michael

    Michael is a neighbor of Rosalio. He states he was at home in his apartment on 05/17/2020, but he was asleep in bed and did not hear or see anything.

    boden, janalyn

    Janalyn lives in an upper unit near Zach's home. She stated she did not know Zach and did not observe when the fire had been started at his home.

    boden, Olivia

    Olivia lives in an upper unit near Zach's home. She stated she did not know Zach and did not observe when the fire had been started at his home.

    Brown-williamson, Susan

    ​Susan stated she owns a business, AV Design Group, and that Zach is not an employee of her business, but he had done some work for her previously, which led to his employment status with MATC. Susan also had Zach and Alex Weitzel doing demo work at her property in Belgium, WI. She stated no one lives at the property, but Zach had a key with which to gain access. Susan last saw Zach on 05/15/2020 at her property and stated no one would have been there over the weekend. She stated rain delayed window work on Monday, 05/17/2020, & Tuesday, 05/18/2020. Susan had no knowledge of Rosalio's disappearance, but stated that Zach had mentioned Sadie had become unavailable to their daughter due to her new boyfriend. Susan also stated Zach had spoken to her seeking advice regarding obtaining child custody. Susan was currently out of town up north with her son, Frederick Brown-Williamson who also works for her business and is friends with Zachariah.

    Douglas, lynee

    Lynee is a neighbor of Rosalio. She stated she thought she heard an argument from Rosalio's apartment on 05/18/2020 around 1pm. She stated she knew Rosalio had kids and did not think anything of it. She did not see who was arguing.

    Lynee later changed her statement, saying the officer must have misheard her. She stated that she heard a scream in the hallway outside of Rosalio's apartment around 9pm on 05/17/2020. 

    Garza jr., Eulalio

    Eulalio identified himself as Rosalio's uncle. He stated he and Rosalio were close but would occasionally go a few weeks without speaking. He stated no one had heard from Rosalio in a few days, including the mother's of his two children, so they attempted contact with him. He stated he was not aware of Rosalio having any issues with anyone but was told through family members that Rosalio was having an issue with his new girlfriend's ex, whose names he did not know. He speculated that something must have happened to Rosalio due to not being in touch with his children or their mothers. 

    Gray, Erika

    Erika is a neighbor of Rosalio. ​She stated she did not see or hear anything suspicious during the dates in question.

    gray, maureen

    Maureen identified herself as the mother of Steven Lenz, a friend of Zach's. She stated Steven lives with her but frequently disappears. She stated she was familiar with Zach because he used to date Sadie and live across the street. She stated Steven also used to stay behind Zach's house in a camper. Maureen was unclear with where Steven worked.

    grays, Angela

    Angela is a neighbor of Rosalio. ​She stated she did not see or hear anything suspicious during the dates in question.

    Hensley, Nathan

    Nathan is a neighbor of Rosalio. He stated he did not see or hear anything suspicious during the dates in question.

    Huddle, Jennifer

    Jennifer identified herself as a friend of Zach's and had met him while he was working for AT&T in California. She stated that Zach was a simple guy that lived in a motor home at the time and sent all his money to Sadie. She described Zach as a person that keeps to himself. She stated Zach had told her Sadie was dating a different guy but she didn't know who it was. She stated Zach had told Sadie to move out of his residence and presented her with a 60-90 day notice to leave. She stated Zach didn't care and wasn't bothered by his break up with Sadie. She mentioned she was aware that Zach had a bad back and knew nothing about any drugs other than that Zach was arrested in South Dakota. She did not know anything about a missing person.

    jones, Doug

    Doug stated he had only seen the owners of the Anderson Greenview Tree Farm a handful of times and they are rarely on the property. He stated he rarely encounters trespassers and, to his knowledge, nobody was supposed to be on the land.

    Kearns, Sasha

    Sasha identified herself as a good friend of Zach's and stated she met him while he was working as a tech for AT&T. She stated she didn't know Sadie and didn't know Zach and Sadie's situation, only that Zach had told her Sadie was dating several people. Sasha stated Zach told her Sadie wanted the relationship to work with him but it didn't. She stated Zach mentioned seeing Sadie and a guy and something about a birthday party. She wasn't aware of any drug use involving Zach but knew he was arrested in South Dakota. She stated she knew nothing about his involvement in California and didn't know any of his associates other than one of his brother's that she reached out to on Facebook. She stated she last saw Zach in late April and he was driving an Audi. She was not aware of any other girlfriend's that Zach had. 

    kosmal, paul

    Paul resides directly across the street from Zach. He was not familiar with Zach and was unable to provide any information about when the fire was started at the residence. He stated he frequently sees traffic in and out of the residence.

    lavora, eumdeun "Kim"

    Kim stated she reached out to police after speaking with Aileen Noll, whom she met on Facebook. She stated she met Rosalio through Facebook dating and communicated with him daily, but had never met him. She stated Rosalio never mentioned any problems in his life. She stated she last spoke to Rosalio on 05/17/2020 around 8-8:30pm and he told her he had taken his friend shopping and was heading to take his children home. She states he then said he was going to Menard's after dropping the kids off. Kim states she didn't hear from him the rest of the night and when she tried calling him the next morning the call went right to voicemail.

    libers, Jennifer

    Jennifer identified herself as the girlfriend of Solomon Anderson. She stated Solomon was at her residence in the Madison area all day on Sunday, 05/17/2020, through Monday, 05/18/2020, because it was her day off. She stated Solomon typically stays with her on her days off. She also stated that she was aware Zach had been taken to jail but did not know the reason for his incarceration. 

    Loos, Sondra

    Sondra identified herself as an ex-girlfriend of Solomon Anderson, and the mother of his child. She stated they have not been together for almost 15 years, but they see each other when exchanging their child. Sondra stated that on 05/23/2020, she met Solomon at his girlfriend's, Jen Libers, home in the Madison area to drop off their son. Sondra stated that their son had a bicycle with him and when he opened up the back of Solomon's van to put his bike inside, Solomon stopped him and told him to put the bike in the garage instead. Sondra noted that she thought this was strange. She also noted that Solomon and Zach are very close and that Zach had previously accompanied Solomon to court hearings for their custody case. She stated Zach was upset when the court granted her custody at the time. She stated she did not know anything directly related to the incident involving Rosalio. 

    Lowman, Alexander

    Alexander stated he received a letter at his PO Box addressed to the "Care of Junior." He stated his wife worked with Rosalio at Texas Roadhouse 10 years ago and the last time they saw him was 3 years ago. He stated Rosalio is the only person they know that goes by Junior. He stated they have had their PO Box for 3 years. He stated they learned about Rosalio's disappearance on Facebook and felt it was suspicious, but the contests are regarding DJ Promotions. The letter was postmarked in Milwaukee, WI on 05/18/2020. 

    Petty, kayla

    Kayla stated that on Sunday, 05/17/2020, Rosalio arrived at her house at 8:20pm to drop off their daughter. She stated he stayed for about 5 minutes and left. She stated she remembered the time because he wasn't supposed to get there until 8:40pm. She stated Rosalio was wearing a baseball hat, glasses, and black sweat pants. She stated she thought he was wearing tennis shoes but did not remember what kind of sweatshirt he was wearing. She stated he did not mention anything before he left. She stated she has not seen or heard from Rosalio since and it is not like him to disappear. She stated that if he were in trouble he would call her, Kristy, or his mom. 

    raddatz-ortiz, kristy

    Kristy stated she and Rosalio have a son in common. She stated their son was with Rosalio the past weekend and that Rosalio also has a daughter. She stated that her son arrived at home around 8pm on 05/17/2020, but she did not know if Rosalio had dropped off her son or his daughter with her mother, Kayla Petty, first that night. She stated she did not see him drop off their son, but remembered the time because she was on the phone when her son came into the house. She stated her father saw Rosalio's white truck. She stated Rosalio picked up their son that Friday around 7pm and he usually has the kids on the weekend. She stated he hasn't been at work the past few days and that was unusual. She stated if he was in any sort of trouble, he would call her, Kayla, or his mother. She stated she knew he recently started dating a woman with the Facebook name "Sadie Jane." She stated she did not know Sadie, but that she would be someone that might have seen him last. 

    Kristy later provided a written statement detailing that her son was dropped off at 7:53pm on 05/17/2020. She stated she asked her son what Rosalio was wearing that night and he told her a Cubs hat and his glasses. She stated her son didn't not remember if Rosalio was wearing his work boots or red Reebok shoes. She stated her son mentioned Rosalio was going to Aileen's house after dropping him off to check on her sink. She stated she didn't know where he was going and may have had a date and didn't want to tell their son. She stated that Rosalio's daughter was with Rosalio when he dropped off their son so he would have had to drop her off in Twin Lakes.

    remsburg, Casalyna

    Casalyna identified herself as the sister of Christine Remsburg, who was dating Zach. She stated she worked Sunday, 05/17/2020 from 2pm-10pm and went home after work. She stated Zach had not been at the house she shared with her sister at all that day and Christine was alone when she got home. She stated she had no information regarding the stalking allegations or missing person.

    Ryan, Caitlyn

    Caitlyn is the manager at the WoodCreek Apartments where Rosalio lived. She stated Rosalio had been living there since 2018 and had become increasingly more rude in the last 6 months. She stated he had been late with rent and they had to serve him with 5-day eviction notices. She stated that aside from late rent issues, he had no other significant infractions and was not a problem tenant. 

    saylor , erika

    Erika identified herself as the girlfriend of Michael Campbell, Rosalio's friend. Erika stated when Michael had returned home on 05/19/2020, he had mentioned stopping by Rosalio's apartment and what was going on. She stated she started looking on Facebook because they knew Rosalio was having problems with Sadie's ex. Erika stated she found Zach's name, checked CCAP, and then provided the information to Michael and Brandon Hendrickson.

    schreurs, kenny

    Kenny stated he was turkey hunting on Tuesday, 05/19/2020, and was set up in a blind near the Anderson Greenview Tree Farm. He stated around 5:30pm-6pm he heard and observed two people walking through the tree farm. He stated at the time he thought they were hunters but would not be able to identify them if he saw them again and was unable to provide a further description.

    siddiqui, marilyn

    Marilyn is a neighbor of Rosalio. She stated she had not seen or heard anything unusual in the past few days.

    smith, christine

    Christine is a neighbor of Rosalio. She stated she didn't hear anything suspicious on the dates in question. She stated about a month prior to the incident she discarded a rug and placed it in the hallway and the following day the rug was gone. She stated she didn't know who took the rug but suspected that Rosalio took it. She stated she only met Rosalio once and knew nothing about him otherwise. ​​

    stark, amber

    Amber identified herself as the girlfriend of Alex Weitzel. She stated she had been with Alex all weekend, and that on Sunday, 05/17/2020, Alex never left the house. She stated she knows Zach and Alex had told her he had gotten arrested but didn't know why. She stated Alex received that information from Solomon Anderson.

    swanigan, marissa

    Marissa is a neighbor of Rosalio. She stated that on Sunday, 05/17/2020, she heard what she thought was a physical fight inside of Rosalio's apartment, but thought it was the children fighting. 

    williams, Brandon

    Brandon is a neighbor of Rosalio. He stated he did not see or hear anything suspicious during the dates in question.

    ziegler, jennafer

    Jennafer is a neighbor of Rosalio. She stated she did not see or hear anything suspicious during the dates in question.

  • Rosalio gutierrez's apartment

    Kenosha, Wisconsin

    may 2020

    May 19th
    Kenosha PD responded to the apartment of Rosalio Gutierrez after a 911 call from Sadie Beacham. A search warrant was executed at the apartment of Rosalio Gutierrez and detectives began investigating the scene.
    Evidence Evaluated and/or Collected
    Evidentiary Outcome
    HP Chrome Laptop (#17)
    Chromebook found password protected; the passwords were not known, so no exam was performed.
    Cut out couch cushion with blood stain
    Multiple cigarette butts from front yard (#3)
    Not tested
    Receipt from under stairs in hallway (#2)
    Value
    Black "Northface" jacket size XXL (#18)
    Blue undercoat (#18)
    Black ear buds from living room floor
    Blue toothbrush from bathroom
    Human DNA present; Single source profile for pseudo-standard of Rosalio Gutierrez Jr.
    Purple latex glove from bathroom floor
    Not tested
    White Samsung tablet
    Picture/painting with blood on it
    Swab - dinette table top (#16)
    Swab - large blood pool
    Human DNA present; Rosalio Gutierrez is the source
    Red/white toothbrush from bathroom
    Human DNA detected; Julian Gutierrez is the source
    Pink/white toothbrush from bathroom
    Human DNA detected; Single source female; Rosalio Gutierrez Jr., Selia Patterson, Zachariah Anderson, and Julian Gutierrez are excluded
    Purple/white toothbrush from bathroom
    Human DNA detected; Two person mixture; no comparisons can be made
    Purple painted rock from living room floor
    Black folding knife
    Trace lift - fiber (possible hair) from sofa seat cushion
    Hair(s) determined to be unsuitable for analysis
    Trace lift - fiber (possible hair) from pillow on sofa
    Trace lift - sofa cushion
    Black wallet/credit card holder
    Blood swab from living room ceiling (E)
    Blood swab from living room ceiling (A)
    Blood swab from living room ceiling (B)
    Blood swab from living room ceiling (C)
    Blood swab from interior main door knob
    Human DNA detected; Single source male profile; Rosalio Gutierrez Jr. is the source; Additional possible trace allele was detected, however no conclusion was made regarding the allele
    Swab - interior main door lock
    Swab - interior patio door handle
    Human DNA detected; Four-person mixture; At least one male; Major male contributor is Rosalio Gutierrez Jr.; The minor profile was not suitable for comparisons due to the complexity of the mixture/limited amount of genetic information available
    Swab - sofa pillow stain (#8)
    Swab - exterior patio door handle
    Swab - living room ceiling (D)
    Swab - sofa middle seat cushion
    Human DNA detected; Two-person mixture; At least one male; Major male contributor is Rosalio Gutierrez Jr.; Minor contributor not suitable for comparisons due to the limited amount of genetic information available
    Swab - interior door middle right 4'9"
    Swab - interior door center 4'6"
    Swab - Corona bottle
    Swab - exterior door frame south
    Blood detected; Single source male profile; Rosalio Gutierrez Jr. is the source
    Swab - water bottle
    Swab - interior door lower 1'10"
    Swab - exterior door knob
    Swab - exterior door N side
    Human DNA detected; Rosalio Gutierrez Jr. is the source
    Swab - exterior door lock
    Value
    Fiber (possible hair) from living room floor (#13)
    Human DNA detected; Rosalio Gutierrez Jr. is the source
    Fiber (possible hair) from living room floor (#12)
    Hair(s) determined to be unsuitable for analysis
    Piece of wood with blood
    Blood detected; Rosalio Gutierrez Jr. is the source
    Swab - exterior door center name plate
    Blood detected; Single source male profile; Rosalio Gutierrez Jr. is the source
    Fiber (possible hair) from picture/painting
    Piece of hard white substance from large pool of blood 
    5 each Latent print cards
    Section of carpet blood soaked (#10)
    Section of carpet with blood and void
    Section of carpet south with blood towards dinette
    Pillow with blood from couch (#8)
    May 25th
    Kenosha PD continued the search of Rosalio's apartment. Additional items were collected for evidence.
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Net Gear router
    Blood swab from kitchen sink
    Blood swab #1 from kitchen counter
    Human DNA detected; Rosalio Gutierrez Jr. is the source
    Blood swab #2 from kitchen counter
    3 each Latent print lifts/cards from Lysol bottle in kitchen
    Fluid from kitchen sink catch
    Fluid from bathroom sink catch
    May 28th
    Kenosha PD had released the apartment from their protective custody on May 27th around . However, Rosalio's mom, Selia, arrives for the first time at 5:34am and notifies Kenosha PD around 11:30am that she had found Rosalio's cell phone and wallet in the freezer. Kenosha PD returns to the apartment to obtain these additional items for evidence.
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Apple iPhone in a Black Otter Box case
    Rosalio's phone
    Swabs of a stain on the cell phone
    Human DNA detected; Rosalio Gutierrez Jr. is the source
    Swabs from cell phone
    Human DNA detected; Single source male profile; Rosalio Gutierrez Jr. is the source; Additional possible trace allele was detected, however no conclusions were made regarding the allele
    Latent print lifts/cards from iPhone

  • uw-parkside field

    Kenosha, Wisconsin

    may 2020

    On May 19th, Kenosha County Sheriff's Department used a drone to conduct an aerial search of the fields and ditch lines immediately west of Rosalio's apartment. Nothing of evidentiary value is found and no ground search is performed.

  • Zachariah Anderson's home

    Mequon, Wisconsin

    May 2020

    May 19th
    A search warrant under suspicion for stalking was executed by Kenosha PD at Zach's home. Zach's dark blue Dodge Caravan and black Audi A4 were located at the residence. Zach was taken into custody and his personal belongings were secured for evidence.
    Items Evaluated and/or Collected
    Blood detected
    "Levi's" brand blue jeans
    Zach's jeans; No blood detected
    Cutting from right cuff area of jeans
    Human DNA detected; Partial low-level mixture; profile not suitable for comparisons due to the limited amount of genetic information 
    Cutting from left cuff area of jeans
    Human DNA detected; Two-person mixture; At least one male; Zachariah Anderson assumed to be one profile

    ​Rosalio Gutierrez Jr., Selia Patterson, Julian Guttierez, and Unknown female profile from toothbrush at Rosalio's were excluded
    Black sweatshirt
    Value
    White t-shirt
    Underwear
    ANS Flip Phone
    Microsoft G6 smartphone
    May 20th
    A search warrant under suspicion for the missing person/homicide case was excuted by Kenosha PD at Zach's home. Mequon PD, Ozaukee County Sheriff's Department, Mequon Fire Department, and Madison PD assisted; Madison PD responded with a K9. Zach's van was seized and towed to the Milwaukee Crime Lab before the K9s arrived. A laser scanner and drone were used to record the exterior burn pit. 
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Red Samsung flip phone from barn
    Had not been used in years
    Blue Samsung flip phone from barn
    Last activity in 2010
    Craftsman claw hammer from outside trailer
    Vaugh 32 oz hammer from outside trailer
    Clorox bleach label (partially burned) from fire pit
    Clorox bleach bottle (3.78 quarts) from back porch
    Unopened; Full
    Chain saw tool from back yard on ground
    Laptop "Lenovo" from inside residence
    Vehicle titles (05' van & 09' Audi) from inside residence
    5 each buttons from fire pit
    "Fruit of the Loom" underwear band (partially burned) from fire pit
    White/gray "Hanes" sock (partially burned) from fire pit
    Cash - $3,350 from inside residence
    Black fixed blade knife w/ sheath from outside trailer
    Wells Fargo bank papers from Audi dated March 20th
    "Stihl" chainsaw from shed
    No blood detected; no further analysis performed.
    Fire poker metal "pole" from shed
    No blood detected; no further analysis performed
    Swab of dried reddish fluid substance from chainsaw
    No blood detected
    May 21st
    Kenosha PD, Mequon PD, Wisconsin Division of Criminal Investigation (DCI), Ozaukee County Coroner's Office, City of Mequon Streets Department, and Mequon Fire Department searched Zach's property. The septic tank was pumped and nothing of evidentiary value was found; because the K9 did not indicate on the septic tank, the contents were not retained. The full dumpster on the property was dumped out and nothing of evidentiary value was found. 
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Several small bones in the fire pit
    All bones determined to be non-human
    Septic tank contents
    Nothing of evidentiary value
    Full dumpster contents
    Nothing of evidentiary value
    May 25th
    Kenosha PD continued the search of Zach's home. Additional items were collected for evidence.
    Items Evaluated and/or Collected
    Evidentiary Value
    Fluid from kitchen sink catch #1
    Nothing of evidentiary value
    Fluid from kitchen sink catch #2
    Nothing of evidentiary value
    Fluid from bathroom sink catch
    Nothing of evidentiary value
    May 28th
    Kenosha PD continued the search of Zach's home. Additional items were collected for evidence.
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Brown leather "Jameson" sheath (1.5") with a red dry fluid substance
    Initial wet/dry swab did not produce a red substance on the swab tips.
    Swab from leather "Jameson" sheath
    Value
    SD card located in a gym bag inside the home
    30 each children's show videos copied to it on 04/26/2019. Nothing relevant to the case found.
    Thumb drive located inside the home

    December 2020

    December 6th
    Detective Lorn Anschutz removed Zach's computer from evidence and reviewed the contents.

    ​The first thing he observed was a word document entitled "Custody," which contained a log of events dating April 18th - May 19th, 2020. In it, Zach had documented information pertaining to interactions with Sadie, interactions with his daughter, what his daughter had been telling him, Sadie's behavior, and other issues pertaining to Sadie or the kids. Anschutz outlines in his report that nothing was written for the dates April 8 - 23, or April 26 - 30. All other dates had documentation. However, he does not mention in his report what is written for the dates of April 24th & 25th, starting his summary of the entry log on May 1. Any dates missing from the log did not have entries.

    *Please note, these entries are currently summarized based on what is written in Detective Anschutz' report and will be revised as needed once the actual word document is obtained.
    Date
    Summary of Custody Log Entry
    May 1
    Zach documents "She is going to see that guy she pretends is just a friend. It really bothers me that she is trying to lead me on."
    May 6
    Zach documents a situation with OA.
    May 8
    Zach documents that Sadie is all "dolled up" and knows where she is heading.
    May 10
    Zach documents that he located his missing phone after calling his service provider in the north side of Kenosha. He indicates that this is where Sadie's boyfriend lives and that when he asked to have it back Sadie demanded the "truth." He documents "She keeps demanding the truth but whenever I tell her that either one of the kids took it."
    May 13
    Zach documents that Sadie tells him her friend is watching the kids and she's going out. Zach documents "I am expecting she is going on a date tonight with her new someone, except she said he had his kids last weekend."
    May 14
    Zach documents that he's being accused of stalking by Sadie. Zach documents he accidentally sent a text regarding watching TV. Zach documents that Sadie is paranoid and denies tracking a phone he dropped in her car.
    May 16
    Zach documents that Sadie has been taking the kids to bars. He states Sadie is typically in Kenosha by 9p based on her schedule. He states "any child support will be spent on babysitters and gas money for her to spend her nights in Kenosha and that would be Sadie's version of how money is 'spent on the kids.'" Zach also documents "She still does not know where her and the kids are going to move in July. Either that, or she has more serious plans with the new boyfriend she isn't willing to divulge."
    May 18 & 19 
    Zach documents concerns about Sadies paranoia and probable cocaine use.

    December 3, 2023

    Detective Anschutz completes an evaluation of the download from Zach's Motorola G6 smartphone. His report does not outline which of Zach's two G6 smartphones this was. 
    Located in IMAGES file of download
    File Date & Time
    Contents
    04/19/2020 @ 1209
    deleted image
    04/22/20 @ 0725
    deleted image
    04/24/20 @ 1615
    deleted image
    04/24/20 @ 1405
    Google quick search - track my phone
    04/25/20 @ 0113
    Google quick search - look up Colorado license plate
    04/25/20 @ 0118
    Google quick search - Colorado dmv
    04/25/20 @ 0315
    Google quick search - Eugene payyerson
    04/25/20 @ 0900
    Officemax (map locations & Zach's location)
    04/25/20 @ 0900
    Google quick search - Office Depot
    04/25/20 @ 1940
    voice recorder app (app that is screenshot is called "Recording app: Audio recorder & Voice recorder | Audio to te..."
    04/26/20 @ 0751
    Google quick search - two damaged hearts (images)
    04/27/20 @ 0852
    Google quick search - Spectrum billing
    04/27/20 @ 1351
    Google quick search - basketball kinetic energy poten
    04/27/20 @ 1601
    Google quick search - m
    04/27/20 @ 1601
    Google quick search - Mayo Clinic Rochester
    04/28/20 @ 0118
    Google quick search - n gamar
    04/28/20 @ 1316
    Google quick search - Johnny Cash music genre
    04/28/20 @ 1537
    Google quick search - 408 area code
    04/28/20 @ 1645
    Google quick search - freistadt automotive
    04/29/20 @ 0735
    Google quick search - 3003 w bobolink
    04/29/20 @ 0752
    Google quick search - fidelity
    04/30/20 @ 1448
    Google quick search - find my phone
    04/30/20 @ 1729
    Google quick search - free thought project
    04/30/20 @ 1734
    Google quick search - Bill Murray quotes
    05/01/20 @ 1336
    Google quick search - mushroom princess brown hair
    05/01/20 @ 1339
    Google quick search - mushroom princess
    05/01/20 @ 1343
    Google quick search - mushroom princess
    05/01/20 @ 1651
    Google quick search - accuweather
    05/02/20 @ 0742
    deleted image
    05/03/20 @ 0647
    deleted image
    05/03/20 @ 0713
    deleted image
    05/03/20 @ 1643
    Google quick search saved image- accuweather Milwaukee
    05/03/20 @ 1847
    deleted image
    05/03/20 @ 1911
    Google quick search saved image- home budget rules of thumb
    05/30/20 @ 1948
    deleted image
    05/04/20 @ 2039
    deleted image
    05/07/20 @ 0832
    Google quick search saved image- Bieber intentions
    05/07/20 @ 2329
    deleted image
    05/08/20 @ 0305
    deleted image
    05/08/20 @ 1304
    Google quick search saved image- Wells Fargo 
    05/11/20 @ 0525
    Google quick search saved image- Waco show accuracy
    05/12/20 @ 0914
    deleted image
    05/12/20 @ 1444
    Google quick search - number of humps camel
    05/12/20 @ 1522
    Google quick search - the hound actor
    05/13/20 @ 0327
    Google quick search saved image- removes mineral deposits
    05/13/20 @ 0643
    Google quick search saved image- commercial well water filtratior
    05/13/20 @ 0645
    Google quick search saved image- well water cmercial water
    05/13/20 @ 0653
    Google quick search - well water filtration stages
    05/13/20 @ 0713
    Google quick search saved image- well water system design
    05/13/20 @ 0714
    Google quick search - well water system design
    05/13/20 @ 1239
    Google quick search - 4071 n 12th st
    05/13/20 @ 1408
    Google quick search saved image - trending searches
    05/13/20 @ 1605
    Google quick search saved image - aurora gitkas
    05/13/20 @ 1606
    Google quick search - aurora gikas
    05/15/20 @ 0424
    Google quick search saved image - protein per egg
    05/18/20 @ 0418
    Google quick search saved image - Lowes hours
    05/18/20 @ 0418
    Google quick search - Menards hours (map locations & Zach's location)
    05/18/20 @ 0419
    Google quick search - Home Depot hours (map locations & Zach's location)
    05/18/20 @ 0458
    Google quick search - Walmart hours (map locations & Zach's location)
    05/18/20 @ 0645
    Google quick search saved image - Milwaukee three day weather forecast
    05/18/20 @ 1148
    Google quick search saved image - Aurora Back and Spine
    05/19/20 @ 1240
    trending searches image
    05/19/20 @ 1240
    Google quick search - Dillinger
    No date/time
    photo of Colorado license plate with "LOOKUP" written on the plate
    No date/time
    photo of Colorado license plate XXX-000
    No date/time
    photo of Rosalio and son
    Located in VIDEO file of download
    04/25/20 @ 1856
    04/25/20 @ 1857
    3 min 5 sec video of user walking outside and briefly showing television on with lights off
    04/18/20 @ 1543 1556
    04/19/20 @ 0549 2119
    04/20/20 @ 1141 2218
    04/22/20 @ 0454 0510 1347 2016 2120
    04/23/20 @ 0245 0647 0648 0651 0703 1035 2033 2040
    04/24/20 @ 0546 0559 0613 1405
    04/25/20 @ 0726 0827 0828(2) 1009 1302 1604 1731 1749 1919 1935 1938(2)
    04/26/20 @ 1852 2136
    04/27/20 @ 0750 1027 1110 1111
    04/28/20 @ 0059 0814 0843 0917
    04/29/20 @ 0805 1242 1329 1633 2025 2205
    04/30/20 @ 1205 1538
    05/01/20 @ 0553 1054
    05/04/20 @ 2101
    05/05/20 @ 1353
    05/06/20 @ 0738
    05/07/20 @ 2038 2356
    05/08/20 @ 0029 1659
    05/11/20 @ 2114
    05/12/20 @ 0425 1410
    05/13/20 @ 0052 0131 0528 0614 0853 1649
    05/14/20 @ 0950
    ​
    Detective Anschutz reports he observed deleted videos taken on these dates and times. These videos had no data or images associated due to them being deleted.
    Located in AUDIO file of download
    File Date and Time
    Contents
    04/29/20 @ 1100
    (deleted)- directions recording "head east on west highrinedda park rd toward north Main Street. Then turn left onto WI 89 North"
    05/08/20 @ 1550
    (deleted)- nothing
    05/13/20 @ 1503
    directions recording "In a quarter mile use the second from the left lane to turn left onto west Mequon rd"
    05/13/20 @ 1508
    "Your call has been forwarded"
    05/13/20 @ 1519
    Sadie/Zach conversation- arguing about obtaining a lawyer for court. Talks about her allegations of stalking, burner phones in cars, and trackers. 
    05/13/20 @ 1811
    recording of attempted call "ringing"
    05/13/20 @ 2034
    directions recording "in a quarter mile use the second from the left lane to turn left onto Mequon rd"
    05/13/20 @ 2104
    (deleted)- directions recording "in a quarter mile merge onto I41/I94 east"
    05/13/20 @ 2111
    (deleted)- directions recording "in two... (audio cuts out)"
    05/13/20 @ 2119
    (deleted)- directions recording "take the next left towards WI31 south...then turn... (audio cuts out)"
    05/13/20 @ 2124
    (deleted)- directions recording "take the next left onto 12th St / Somers Rd"
    05/13/20 @ 2125
    (deleted)- directions recording "continue on 12th St. for one mile"
    05/13/20 @ 2128
    (deleted)- directions recording "in a quarter mile turn left onto 15th St"
    05/14/20 @ 1106
    Zach/OA conversation - Zach talks about getting an attorney and child custody. He talks about how Sadie wasn't cooperating with custody. Zach talks about Sadie's newest ties to Kenosha and how Sadie was probably down in Kenosha again. OA asks about his new girlfriend and Zach talks about her. Zach mentions that Sadie isn't truthful about the extent of her relationship with the Kenosha guy but mentions he knows what is going on, calls it "funny stuff" and says it doesn't feel right. Zach talks to OA about doing "the thing we talked about" and about her forgetting her key. Zach tells her to keep her key in her backpack and to always remember her backpack. Zach tells OA they will figure things out. Zach hangs up with OA, but keeps recording.

    Zach makes a call to Susan and talks about how he will be there tomorrow to work on her house with Alex. Zach states he is at Home Depot and will be there to meet her soon. 

    Zach continues to record, though nothing else is captured other than the sounds of him entering & exiting his vehicle. 
    05/14/20 @ 1555
    recording of phone ringing and nobody answers
    05/16/20 @ 1712
    Zach/OA conversation- Zach asks about the date and states he can't find his phone. Zach talks about how he talked to Sadie but she refuses to let the children go with him. Zach and OA talk about how Sadie has been skipping work, going to the bar, and has not been following through with her promises. Zach and OA discuss Sadie's behavior and decisions, especially Sadie's drinking. 
    05/18/20 @ 1656
    directions recording "in two miles use the right two lanes to exit 48 for WI 145"
    05/18/20 @ 1700
    directions recording "in two miles take exit 8 for Silver Spring Dr."
    05/18/20 @ 1703
    directions recording "take the next left onto west Thirston Ave"
    05/18/20 @ 1704
    directions recording "your destination is on the left"

  • Zach's dodge caravan

    may 2020

    May 20th
    Officers of Kenosha PD execute a search warrant at Zach's home in Mequon, Wisconsin. Zach's van was present at the home and was visually inspected by officers prior to getting towed to the Wisconsin State Crime Lab in Milwaukee. The van was towed from his home before K9s arrived. 
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Walmart receipt from dashboard of van
    Determined to be from 05/18/2020 08:36:38; Items listed:
    1. 1,000ct swab
    2. Old Spice
    3. Harry S (shampoo)
    4. Playtex gloves, size large
    5. Playtex cloves, size large
    6. Hefty 13 gallon bags
    7. Hefty 13 gallon bags
    8. SMK sardine
    9. SMK sardine
    10. SMK sardine
    11. Clorox wipes
    12. Clorox wipes
    Brown leather wallet with ID, financial cards, etc.
    Zach's wallet; No evidentiary value
    Contents from glove box including receipts, paperwork, employment checks, etc.
    Tool bag containing many tools from front passenger seat
    Scissors from tool bag
    Swab of dried reddish fluid substance from scissors in tool bag
    Razor blade from tool bag
    Swab of dried reddish fluid substance from razor blade in tool bag

    December 2020

    December 16th
    A search warrant was served for Zach's van, located at Jensen's Towing in Kenosha where it was stored. Detectives took photographs and removed a section of the carpet for evidence.

    March 2022

    March 15th
    Kenosha PD officers returned to the van, which was located at Jenson's Towing in Kenosha, to collect other items for evidence at the request of District Attorney Michael Graveley. Specially, they were instructed to obtain all of the contents located in a drawer underneath the front passenger seat.
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Small piece of cardboard with writing: "Monday, January 27th 2:00pm 102(?) N 27th St First Floor M.53233 Otto 9am Feb 3"
    Razor knife w/ wood handle 1.5" blade used condition
    3 each rubber bands
    5 each never used pencils "Mad Libs"
    2 each cans "Polar" sardines
    Menards receipt dating 02/26/2020 11:41am
    1 each Q tip
    Anytime Fitness receipt dated 11/18/2019 3:02pm
    AAA card for Zachariah Anderson
    small yellow tool kit "Dewalt" containing bits & screws
    Walmart receipt dated 04/10/2020 9:11am
    Financial receipt dated 05/13/2019 "Zach Anderson" "[twin boys names]" "GLC" "$400"
    Pay stub: "Topcraft LLC" "Employee Zachariah Anderson" pay period 12/08/2019-12/21/2019
    WI vehicle registration for 05' Dodge van
    Spectrum utility bill in sealed envelope addressed to Zachariah Anderson. On back handwritten: "26th @ 9:30" "2901 W River Run Pkwy"
    Sealed envelope addressed to Zachariah J Anderson from Topcraft LLC "Important Tax Documents Enclosed"
    Medical style face mask
    8 each colored photo prints of children/Zachariah Anderson/family
    Small yellow container (from inside van used to carry contents from drawer)

  • Anderson greenview tree farm

    Random Lake, Wisconsin

    may 2020

    May 27th
    A search warrant was excuted by Kenosha PD at the Anderson Greenview Tree Farm. Sheboygan County Sheriff's Department, Madison PD with a K9 assisted. Drones were used to video and photograph the area. A search by foot, K9, and drone were conducted. The K9s marked positively on the burn pit. 
    Items Evaluated and/or Collected
    Evidentiary Outcome
    Shovel (used/old condition) from barn
    Black "Husky" 8 lb sledge hammer/axe from barn
    Swab from shovel handle
    Swab from hammer/axe handle
    Swab from tractor steering wheel
    Human DNA detected; Low level partial female profile; Rosalio Gutierrez Jr., Selia Patterson, Zachariah Anderson, and Julian Gutierrez are excluded
    Swab from tractor seat
    Swab from tractor gear shift
    Human DNA detected; Low level partial profile; Rosalio Gutierrez Jr., Selia Patterson, Zachariah Anderson, and Julian Gutierrez are excluded
    May 28th
    Officers of Kenosha PD, Sheboygan County Sheriff's Department, Random Lake Fire Department, Wisconsin Division of Criminal Investigation (DCI), and a Forensic Anthropologist from the University of Wisconsin-Oshkosh continued the search of the tree farm. The fire pit was excavated and searched using a grid system and debris from the fire pit was loaded into buckets marked by sector for processing.
    Evidence Evaluated and/or Collected
    Evidentiary Outcome
    Multiple small pieces of possible bone from sector F
    Determined to be non-human
    Numerous small/medium size bones from sector E
    Determined to be non-human
    Numerous small bones from sector E
    Determined to be non-human
    Small bones from sector G
    Determined to be non-human
    Small bones from sector E
    Determined to be non-human
    Bones recovered from backfield of property on May 27th
    Determined to be non-human
    Bones recovered from fire pit on May 27th
    Determined to be non-human
    Numerous fiber material from sector F
    Larger fiber pieces from sector F
    Small piece of fabric from sector F
    Burnt carpet from sector D
    No human DNA detected
    Buckle from sector F
    Plaid fabric from sector D
    Fiber material from sector D
    Misc small metal pieces from sector F
    Small metal pieces from sector F
    Value

    June 2020

    June 3rd
    Kenosha PD detectives returned to the tree farm to conduct a walking search. Sheboygan County Sheriff's Deputies provided scene security. Detectives believed they briefly smelled a faint odor of decaying flesh near the the north end of the property. They searched the area on foot extensively and did not locate the odor again or its source. They did not note any disturbances indicating a clandestine grave. Nothing of evidentiary value was found. 
    Evidence Evaluated and/or Collected
    Evidentiary Outcome
    A necklace thought to match Rosalio's
    Found not to be Rosalio's necklace

    July 2020

    July 28th
    A search warrant was served again by Kenosha PD at the tree farm. The Federal Bureau of Investigation (FBI), Wisconsin Department of Natural Resources (DNR), Sheboygan County Sheriff's Department, Wisconsin DCI, Kenosha Museum, Madison PD with K9s, and UW-Oshkosh assisted. The Kenosha County District Attorney's office was also on-site. 

    A search of the entire property was conducted using a line search method. K9s marked on several areas of the property, which were checked visually and digging by hand, determining none of the sites were clandestine graves. The K9s also marked on the mower deck a mower in the barn. No human remains were found. 
    Items Evaluated and/or Collected
    Evidentiary Outcome
    A work type glove located on the N/W side of the property 
    A serrated knife w/ a duct tape wrapped handle located on the N/W side of the property (21" total w/ a 16" blade)
    Vehicle stickers/tags: 3 each Jeep "King of the Mountain" Nastar tags. Tag numbers 193, 194, & 195. Also with them a small tag stating "Check your results at Nastar.com" all located on the N/W side of the property
    Small piece of twine located at the N/W side of the property

  • susan brown-williamson's property

    Belgium, Wisconsin

    May 2020

    On May 28th, Kenosha PD officers responded to the residential property of Susan Brown-Williamson, after learning that Zach was doing work on the property and had access with a key. With Susan's presence and cooperation, officers conducted a walking search of both the residence and the 1.5 acres of land. Based on the walk-through, officers were able to confirm that the residence was currently under renovation. There were no immediate signs of evidence located and much of the land appeared undisturbed for a long period of time. 

    July 2020

    On July 17th, Kenosha PD conducted a search warrant at Susan's property assisted by a Madison PD officer and his K9 partner. Nothing of evidentiary value was found.

  • Harrington beach state park

    Belgium, Wisconsin

    July 2020

    On July 17th, Kenosha PD searched Quarry Lake and Puckett's Pond at Harrington Beach State Park with the assistance of a Madison PD officer and his K9 partner. This area was searched because it was close in proximity to Susan Brown-Williamson's property, which Zach was working on. Nothing of evidentiary value was found. 

    June 2021

    On June 17th, Quarry Lake was searched again using two methods. A small boat was deployed with side scan and down imaging sonar. This sonar provides a visual display of items on the lake bed. A Remote Operated Submersible Vehicle (ROV) was deployed from various shore locations. The ROV uses a combination of sonar and a camera to locate and identify sub-surface objects or items. A thorough search yielded no human remains or items of evidentiary value.​

  • cameras

    Kenosha PD canvased the areas around Rosalio's apartment, Zach's home, the Anderson Greenview Tree Farm, and Susan Brown-Williamson's property to find local surveillance cameras. They reviewed recorded footage from residential and commercial surveillance cameras, and contacted the Wisconsin Department of Transportation and Illinois Tollway. Specifically, they reviewed the footage and records for any sightings of or traffic violations for Zach's black 05' Dodge Caravan between 05/17/2020 - 05/18/2020, which was the proposed timeframe of Rosalio's disappearance.
    Camera(s) and/or Traffic Records Reviewed
    Evidentiary Outcome
    Wisconsin Department of Transportation
    No license plate captures or violations pertaining to Zach's van during the timeframe of concern
    Illinois Tollway
    No license plate captures or violations pertaining to Zach's van during the timeframe of concern
    9026 12th St. Kenosha
    No footage of Zach or his van
    1258 39th Ave. Kenosha
    No footage of Zach or his van
    1251 39th Ave. Kenosha
    No footage of Zach or his van
    1208 39th Ave. Kenosha
    No footage of Zach or his van
    1224 39th Ave. Kenosha
    No footage of Zach or his van
    1253 39th Ave. Kenosha
    No footage of Zach or his van
    401 Highland Dr. Fredonia
    No footage of Zach or his van
    W4705 County Rd. D Random Lake
    No footage of Zach or his van
    750 E. Green Bay Ave. Saukville
    No footage of Zach or his van
    280 Highland Dr. Fredonia
    No footage of Zach or his van
    N535 Hwy 57 Random Lake
    No footage of Zach or his van
    105 Lakeview Dr. Belgium
    No footage of Zach or his van
    1025 W. Glen Oaks Ln. Mequon
    No footage of Zach or his van
    11147 N. Port Washington Rd. Mequon
    No footage of Zach or his van
    Kenosha Transit Buses
    No footage of Zach or his van

  • investigation timeline

    may 2020

    May 19th​​
    • 11:22am: First officers arrive on scene at Rosalio's apartment. 
    • 12:02pm: Detective Vicente Correa arrives on scene.
    • 12:14pm: Detective Lorn Anschutz arrives on scene.
    • 1:46pm: Officers Jeffrey VanWie and Eric Weidner arrive on scene as evidence technicians. 
    • 2:11pm: A search warrant is executed at Rosalio's apartment and detectives begin investigating the scene.
    • 3:20pm: WI State Patrol's Traffic Reconstruction Unit responded to Rosalio's apartment to laser scan and record the interior.
    • (Time unknown): Kenosha County Sheriff's Department uses a drone to conduct an aerial search of the fields and ditch lines immediately west of Rosalio's apartment. 
    • 4:14pm: Officers interview Sadie at the Kenosha Public Safety building. 
    • 5:22pm: Officers interview Kristy Raddatz-Ortiz at the Kenosha Public Safety Building.
    • 5:47pm: Officers interview Zach's daughter, OA, at the Kenosha Public Safety building.
    • 7:00pm: Police begin search of Zach’s home in Mequon.
    • 8:14pm: Time of sunset in Mequon, WI.
    • (Time unknown): Officers interview Eulalio Garza, Rosalio's Uncle.
    • 10:52pm: Officers begin an interrogation of Zach at the Kenosha Public Safety building.
    May 20th
    • 12:16am: The interrogation of Zach concludes when he asks to speak with a lawyer.
    • 12:46am: Zach is booked into Kenosha County Jail on stalking charges.​
    • 11:20am: Kenosha PD obtains a second search warrant for Zach's residence.
    • 2:43pm: Zach's van is towed from his house to the Wisconsin State Crime Lab.
    • 3:00pm: K9 Handlers arrive to Zach's house.
    • Officers interview Andrew Schultz.
    • Officers leave an external hard drive with employees at the BP located at 11147 N Port Washington Rd for video footage.
    • Officers leave an external hard drive with William Mikkelson to obtain video footage of the north/south traffic on Port Washington Rd.
    • Kenosha PD get a statement from Michael Campbell.
    • Selia arrives to Kenosha from Colorado.
    May 21st
    • Kenosha PD and several other agencies search Zach's property and fire pit. Only non-human bones were found.
    • Schulteis Pumping pumps out the septic tank at Zach's residence. No weapons or body parts were found.
    • The City of Mequon Streets Department dumped out the contents of the dumpster on Zach's property. Nothing of evidentiary value was found.
    • Detectives go to Walmart to find out what Zach had purchased on 5/18.
    • Detectives review and request video footage from Kwik Trip at 750 E. Green Bay Ave. in Saukville.
    • Detective Lorn Anschutz interviews Christine Remsburg, Zach's girlfriend.
    • Detective Lorn Anschutz interviews Casalyna Remsburg, Zach's girlfriend's sister.
    • Detective Lorn Anschutz interviews Andrew Schultz, Zach's friend. 
    • Detective Lorn Anschutz interviews Alex Weitzel, Zach's cousin.
    • Detective Lorn Anschutz interviews Amber Stark, Zach's cousin's sister.
    • Detective Lorn Anschutz interviews Steven Lenz, Zach's friend.
    May 22nd
    • Detectives pick up copies of the video surveillance footage from Kwik Trip. 
    • Detectives collect Zach's modem and router as evidence.
    • Zach had been planning a bonfire at his home and had invited the kids, per an email sent to Zach by Sadie. 
    • Kristy Raddatz-Ortiz goes to the Kenosha Public Safety Building to provide a written statement.
    • Kayla Petty goes to the Kenosha Public Safety Building to provide a written statement. 
    • 9:01am: Officer Lorn Anschutz interviews Zach's daughter, OA, again by phone. 
    May 23rd
    • Kenosha PD contacts the IL State Police to search for Zach's van on the tollway. No violations were recorded from 5/1-5/26.
    • Officers interview Susan Brown-Williamson.
    May 25th
    • Officers review video footage from cameras at the Hi-Line gas station at Interstate 43 and CTY Rd D. Zach's van was not seen.
    • Officers collect video footage from Oscar's Auto Sales at N535 Hwy 57 N. 
    • Officers leave an external hard drive with Casey General Store at 280 Highland Dr. in Fredonia to obtain video footage.
    • 5:25pm: Officers collect DNA samples from Zach.
    May 26th
    • Officers review IPASS records and determined neither of Zach's vehicles were captured on Illinois toll roads in May.
    • Officers obtain a search warrant for the Anderson Family Tree Farm.
    • ​Detective Lorn Anschutz interviews Solomon Anderson, Zach's brother.
    • Detective Lorn Anschutz interviews Jennifer Libers, Zach's brother's girlfriend.
    • Detective Lorn Anschutz interviews Eumdeun Kim Lavora.
    May 27th
    • The Anderson Family Tree Farm is searched from ground to air. Nothing of evidentiary value is found. 
    • 12:26pm: Kenosha PD release the scene at Rosalio's apartment.
    May 28th
    • Wisconsin Department of Criminal Investigation and several other agencies search the burn pit at the Anderson Family Tree Farm. Nothing of evidentiary value is found and all bones located in the fire pit were non-human.
    • The home of Susan Brown-Williamson is searched. Nothing of evidentiary value is found. 
    • Detective Lorn Anschutz interviews Joshua Anderson, Zach's brother.
    • Detective Lorn Anschutz interviews Zenith Anderson, Zach's sister.
    • 05:34am: Selia goes to Rosalio's apartment for the first time since it was released by KPD. 
    • 09:15am: Selia calls KPD to tell them she found Rosalio's phone and wallet in the freezer. 
    • 4:03pm: Kenosha PD release the scene at Zach's home.

    June 2020

    ​June 1st
    • Officers receive an email from Lieutenant Matt Spence with the Sheboygan County Sheriff Department stating that Kenny Schreurs encountered two people at the tree farm at the time of the incident. 
    • Detective Lorn Anschutz interviews Kenny Schreurs, who states on 5/19 he was hunting and saw two people walking around the N/E corner of the tree farm. He had no further information.
    • Detective Lorn Anschutz interviews Doug Janes, who states he has only ever seen the owners of the tree farm a handful of times and never on the N/E corner of the farm.
    June 2nd
    • Kenosha PD obtains another warrant to search the Anderson Family Tree Farm based on the information obtained from Kenny Schreurs and Doug Janes.
    • Detective Lorn Anschutz interviews Aileen Noll at her residence.
    June 3rd
    • Detectives conduct another walking search of the Anderson Family Tree Farm.
    June 5th
    • Kenosha PD receives Zach's financial records from Associated Bank.
    June 10th
    • Kenosha PD receives cell tower records from AT&T.
    June 26th
    • Detective Lorn Anschutz interviews Christine Smith, Rosalio's neighbor. 

    July 2020

    July 28th
    • 5:30am: Kensoha PD and Sheboygan County Sheriff's Department serve another search warrant at the Anderson Tree Farm.
    • 8:00am: Kenosha PD, WI DNR, FBI, Sheboygan Sheriff, WI DCI, Kenosha Museum, and UW-Oshkosh searched the Anderson Tree Farm on foot. No human bones or remains were located.
    July 30th
    • Detective Lorn Anschutz interviews Zenith Anderson again over the phone. 

    august 2020

    August 5th
    • Detective Lorn Anschutz interviews Jennifer Huddle.
    • Detective Lorn Anschutz interviews Sasha Kearns.

    September 2020

    September 18th
    • Detective Lorn Anschutz interviews Steven Lenz.

    October 2020

    October 6th
    • Detective Lorn Anschutz reviews files from Zach's computer.

    November 2020

    November 6th
    • Detective Lorn Anschutz re-interviews OA with Sadie present at their home.

    December 2020

    ​December 11th
    • 3:00pm: Zach is charged with 1st Degree Intentional Homicide and Hiding a Corpse.