A Kentucky man who filmed himself beating his grandmother to death inside her Erlanger home was sentenced Tuesday to life in prison with a chance for parole after 20 years, bringing closure to a killing that prosecutors called "the most premeditated murder" they had ever seen.
Wyatt Testerman, now 19, pleaded guilty but mentally ill to one count of murder in May for the October 2024 slaying of Cheri Oliver, his grandmother. Kenton County Circuit Judge Patricia M. Summe handed down the sentence Tuesday, rejecting defense arguments that a drug-induced psychotic episode warranted leniency.
Background
Testerman's attack on Oliver was methodical and calculated, according to court filings. Prosecutors said the teenager spent time preparing before the assault—closing blinds inside Oliver's Erlanger home, rolling up the living room rug, and repositioning furniture. He then propped a cellphone in position to record what was about to happen.
When he attacked 74-year-old Cheri Oliver, Testerman shoved her to the floor and began punching her more than 40 times, prosecutors said. He stomped on her approximately a dozen additional times and repeatedly struck her with a "metal drinking tumbler," inflicting blunt-force head injuries that proved fatal.
His own mother attempted to intervene, striking him with a cane in an effort to stop the attack, according to investigators.
The Investigation
Prosecutors presented disturbing evidence of premeditation. Video footage captured Testerman preparing the room before the assault. Text messages sent beforehand included one that read: "She will be beaten to a pulp. No mercy for terrorists."
During the attack itself, prosecutors alleged, Testerman stopped to check Oliver's pulse and said, "How the f— is she still breathing?" before resuming the beating with the metal tumbler.
Testerman had warned beforehand that his grandmother would "suffer the consequences," according to court filings.
The case was initially headed toward trial, with Testerman planning an insanity defense. He ultimately abandoned those plans and pleaded guilty in May, admitting he had been abusing LSD for an extended period before attacking Oliver "without reason."
Defense attorney Timothy Schneider argued his client experienced a drug-induced psychotic episode that did not meet Kentucky's legal standard for insanity because it resulted from voluntary drug use.
"There was nothing that said that you were on drugs at that point," Judge Summe responded during Tuesday's hearing, according to the Cincinnati Enquirer. "If you could do this to your grandmother, I don't know what you could do to the rest of the community."
Key Takeaways
- Wyatt Testerman was sentenced to life in a Kentucky state correctional facility with eligibility for parole after 20 years
- He pleaded guilty but mentally ill to murdering his 74-year-old grandmother Cheri Oliver in October 2024
- Prosecutors presented video evidence showing meticulous preparation, including closing blinds and rolling up rugs before the attack
- Testerman admitted to abusing LSD for an extended period but argued it caused a psychotic episode
- Kenton County Commonwealth's Attorney Rob Sanders called it "the most premeditated murder I've ever seen"
What's Next
Testerman will serve his sentence in a Kentucky state correctional facility. While he becomes eligible for parole consideration after 20 years, Judge Summe expressed skepticism that rehabilitation could address the calculated nature of this crime. The case is now closed following Tuesday's sentencing.
Testerman apologized to his family before sentencing, telling the court: "I pray every day that she knows how much I love her and how sorry I am for what I did," according to WLWT.