A Kentucky resident confessed on Tuesday to the horrific murder of his grandmother, launching an unprovoked assault that led him to plead guilty but mentally ill in the courtroom.
Nineteen-year-old Wyatt Testerman accepted the murder charge, permitting him to receive mental health care while incarcerated, as stipulated by state legislation.
Testerman’s plea was made without any prosecutorial deal, with Kenton County Commonwealth Attorney Rob Sanders announcing intentions to pursue a life sentence, according to reports from the Cincinnati Enquirer.
The prosecution revealed that Testerman captured a video of the October 2024 incident, which took place inside the home of his 74-year-old grandmother, Cheri Oliver.
Footage allegedly depicts Testerman positioning a phone to document the event before violently pushing Oliver to the ground and assaulting her.
The video allegedly shows Testerman setting up a phone to record before shoving Oliver to the floor and beating her.
At one point, he stopped to check her pulse and said, “How the [expletive] is she still breathing?”
According to court filings, Testerman struck Oliver more than 40 times, including with a metal cup, and stomped on her about a dozen times.
A Kentucky teenager admitted in court to killing his grandmother in what prosecutors described as a brutal and unprovoked attack. (Kenton County Detention Center; Erlanger Police Department)
Police found Oliver unconscious in a pool of blood. She later died from blunt force trauma to the head, according to the report.
Testerman’s mother told investigators she witnessed the attack and tried to stop him.
Another witness told police that Testerman had earlier accused Oliver of being “suicidal and a terrorist” and warned her to stay seated or “suffer the consequences.”
Prosecutors say a teenager recorded a deadly attack on his grandmother in an unprovoked assault. (Erlanger Police Department)
In court, Testerman said he had been struggling with substance abuse.
“I had been abusing acid for quite some time,” he said. “Without reason on that date, I attacked my grandmother, striking her numerous times and killing her.”
Testerman had been expected to pursue an insanity defense when his trial was set to begin May 12, but a defense expert later determined he suffers from antisocial personality disorder, his attorney said.
According to the report, Testerman told the judge he was experiencing hallucinations in the courtroom but acknowledged he understood the proceedings.
He faces 20 years to life in prison and is scheduled to be sentenced July 7.
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