Glenn Hershey (copy)

Glenn Hershey

A man with a history of sexual compulsiveness will spent 8 to 20 years in prison for sexually assaulting an 86-year-old woman with Alzheimer’s disease at a nursing home.

Lancaster County Judge Jeffery D. Wright said Glenn Hershey, 67, had a "proven inability to control his sexual urges" and was a high risk to reoffend at his sentencing Wednesday.

The assault happened Jan. 20, 2013, at Maple Farm Nursing Center in Akron, where the woman and Hershey were residents.

Police said Hershey assaulted the woman in her room, where he had previously been told not to go.

She has since died.

Hershey, who entered the courtroom handcuffed to the walker he used, apologized.

"This is a lifelong problem of mine," he said. "... For once in my life, I want to try to correct it."

Hershey pleaded no contest in February to one count of involuntary deviate sexual intercourse against a person with mental disability. Three other charges of aggravated indecent assault, indecent assault and sexual assault were dropped.

Hershey had already been a registered sex offender. Just before sentencing, Wright determined Hershey was a sexually violent predator, which subjects him to lifelong registration, based on the assessment of a psychologist.

Robert Stein cited Hershey's history of multiple psychiatric issues, including bipolar disorder and sexual compulsiveness; his multiple failures of treatment at both inpatient and outpatient facilities for his problems and acts of sexual aggression with prostitutes in the early 1990s as meeting state criteria to be deemed  a sexually violent predator.

In April 1993, Hershey was convicted of sexually assaulting a prostitute when he lived in Columbia.

Hershey had hired a woman from a Philadelphia escort service to fulfill a fantasy. Hershey agreed to pay the woman $1,000 to play “Mommy” while he wore a diaper, according to testimony.

However, when the woman showed up, Hershey tried to pay her in Monopoly money. Hershey then threatened her with a knife and raped her.

He eventually pleaded guilty to felony indecent assault and served about seven years in prison.

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Dan Nephin is a Lancaster Newspapers staff writer. He can be reached or (717) 481-6150. You can also follow @DanNephin on Twitter.