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Michael J. Olson, 35, pleaded guilty to aggravated murder and four other charges in the death of Mary Kay "Katie" Wohlfarth, 68, at an Akron self-storage facility and was sentenced August 27, 2019, to life in prison without the possibility of parole, plus more than 20 consecutive years.

Authorities placed the crime on or about June 17 to June 19, 2019. Wohlfarth helped Olson clean and vacuum his storage unit in the 500 block of East Tallmadge Avenue in Akron's North Hill neighborhood. Prosecutors said Olson waited as she emptied a shop vacuum into a Dumpster, then beat her to death, sexually assaulted her and locked her body in the unit, which was rented by Olson or his father. He fled in her 2012 Kia Sedona minivan. No extensive staging was reported beyond concealing the body.

Wohlfarth, a well-known local antiques dealer, and Olson were acquaintances who rented units across from each other at the facility. Olson, a local handyman living on Phyllis Avenue near Portage Lakes in the Coventry Township and Akron area, had previously worked for her. No earlier disputes or violence between them were reported. Olson had a 2015 domestic-violence charge that was amended to disorderly conduct. Prosecutors called the attack brutal and opportunistic, but no clear personal motive was established. Olson later said drug use was a "big factor," while taking full responsibility and blaming only himself.

Wohlfarth's family last spoke with her June 17, and her body was found June 19. A facility-related individual called 911 to report her missing and provided video of an unauthorized person entering her unit. Surveillance showed Olson entering the area or unit and driving away in her minivan, which was later recovered on Whittier Avenue in West Akron. Summit County Sheriff's deputies arrested him at his home June 19, and he confessed that day to Akron detectives.

The medical examiner ruled that Wohlfarth died from blunt-force trauma to the head and neck and classified the death as a homicide. The findings also included evidence supporting the rape charge, which Olson admitted. Investigators cited the body in the storage unit, the surveillance recording, his confession and the vehicle theft. Family members also recalled an odd message from Wohlfarth that they later viewed as a possible "breadcrumb," though it was not a primary investigative focus. No major contradictions in the core evidence were publicly detailed.

Olson initially pleaded not guilty in Akron Municipal Court, where bond was set at $1 million, and waived the speedy grand-jury timeline. A Summit County grand jury indicted him August 20, 2019, on aggravated murder, a special felony; rape, an F1; gross abuse of a corpse, an F5; grand theft of a motor vehicle, an F4; and trespass in a habitation, an F4. Possible death penalty specifications were not pursued after plea discussions.

Under a plea agreement approved by Wohlfarth's family and investigators, Olson pleaded guilty to all charges before Summit County Common Pleas Judge Amy Corrigall Jones and avoided a potential death sentence. He offered his "deepest apologies" in court and acknowledged personal responsibility. Prosecutor Sherri Bevan Walsh called him a "brutal, cold-blooded killer" and said the community was safer with him imprisoned for life. There were no other defendants.

The video is a police interview-room recording that runs about 42 minutes. It shows the interview itself, without narration or a presenter.