Zachariah Anderson: Timeline of murder case as father faces trial for killing Rosalio Gutierrez

In this article, you will get all the information regarding Zachariah Anderson: Timeline of murder case as father faces trial for killing Rosalio Gutierrez

A father accused of brutally murdering his former girlfriend’s new lover is currently standing trial in a Wisconsin court.

Zachariah Anderson, 42, is charged with beating 40-year-old Rosalio Gutierrez Jr to death at his apartment in Wood Creek back in May 2020. Mr Anderson allegedly stalked Gutierrez relentlessly before the killing, and then disposed of his corpse afterward. The body has never been found.

Gutierrez had been dating Mr Anderson’s former girlfriend Sadie Beacham – with whom the accused killer shares three children.

Prosecutors allege that Mr Anderson was motivated by jealousy – while the defence claims authorities failed to look into any other potential suspects.

The 42-year-old is charged with first-degree intentional homicide, hiding a corpse and stalking, and faces the possibility of life in prison pending the outcome of the trial in Kenosha County Circuit Court.

Here’s a timeline of the case:

April 2020 – Alleged stalking visits

During his high-profile trial, jurors have heard that Mr Anderson was jealous of his former partner’s new relationship and was spying on the couple.

On 15 March 2023, Mr Anderson’s 15-year-old daughter took the stand to testify that her father had asked her to spy on her mother Ms Beacham and record “every single time my mother would get upset”.

She testified that he would “frequently” bring up Guttierez when she saw him.

Then, not long before Guttierez’s disappearance, Mr Anderson also allegedly took his daughter with him to spy on the couple.

On the night of 24 April 2020 – less than one month before the killing – she said that her father had driven them both to her mother’s home to watch Ms Beacham and Gutierrez through the window.

Accused killer appears to signal to daughter to stop talking as she testifies against him

Anderson also went through Gutierrez’s truck and took photos of the vehicle’s licence plate and registration, she said.

He then rang the doorbell of the home and fled, she said.

The teenager also testified that her father told her about his plans to follow his love rival – who he referred to using a racial slur.

“He said something about showing him who the man was, and I didn’t quite understand, but you kind of caught onto things that my dad was referring to or was implying,” she said.

“My dad said to me, he said ‘I may just watch him or follow him to his house one time just for the fun of it.’ Those were his exact words to me.”

17 May 2020 – Disappearance and alleged murder

Less than one month after the alleged stalking visits, Guttierez was last seen or heard from on 17 May 2020.

Two days later, a concerned Ms Beacham visited his home to check on him after she couldn’t get in touch with him.

When she arrived at his apartment, she discovered the patio door open and blood on the floor, furniture and ceiling of the home.

An area rug was also missing from the property, she told investigators.

Rosalio Gutierrez has not been seen in almost three years


Ms Beacham contacted police who carried out a welfare check inside Gutierrez’s home.

Inside, investigators found large amounts of blood and signs of a struggle, according to a criminal complaint.

The victim’s body has never been found but investigators believe he is dead based on the sheer volume of blood found inside his apartment.

On the evening of 17 May 2020, prosecutors allege that Mr Anderson went to Gutierrez’s apartment and brutally killed him with blunt force because he was jealous about his relationship with his former partner.

He then allegedly disposed of Gutierrez’s body.

The morning after Gutierrez was last seen alive, he was spotted on surveillance footage doing to a local WalMart where he bought garbage bags, latex gloves and bleach wipes.

He also bought cans of sardines.

Investigators closed in on Mr Anderson as Ms Beacham revealed that she believed her ex was tracking her movements.

On the day Guttierez’s death was discovered, officers found burn pits smoldering at both Mr Anderson’s home and his farm, with the remains of a bleach bottle and the accused killer’s clothing among the ashes.

Prosecutors said that Guttierez’s DNA was then found inside Mr Anderson’s work van and that there was evidence that the interior had been scrubbed with bleach.

Zachariah Anderson is pictured in mugshot

(Kenosha County Jail)

Parts of the vehicle’s interior carpet had also been removed.

Bizarrely, two opened and uneaten cans of sardines were also discovered under the front passenger seat, the criminal complaint states.

21 May 2020 – Anderson arrested for stalking

On 21 May 2020, Mr Anderson was arrested and charged with two felony counts of stalking.

December 2020 – Charges upgraded

Seven months after his initial arrest, Mr Anderson was charged in December 2020 with charges of homicide and hiding a corpse.

He has pleaded not guilty to all charges.

28 February 2023 – Trial begins

Mr Anderson’s murder trial began on 28 February 2023 in the Kenosha County Circuit Court

15 March 2023 – Daughter testifies

Mr Anderson’s 15-year-old daughter took the stand for the prosecution on 15 March, detailing how her father allegedly stalked her mother and Gutierrez.

A dramatic moment unfolded while she was on the stand when Mr Anderson appeared to send a signal warning for her to stop talking.

Mr Anderson was seen putting his hand to his mouth and clamping his lips shut as he stared at his daughter at the front of the court.

Prosecutors accused the defendant of signalling to his daughter as she testified.

Meanwhile, the defence also accused Ms Beacham of using sign language to communicate with her daughter on the stand.

Zachariah Anderson: Timeline of murder case as father faces trial for killing Rosalio Gutierrez

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