A convicted sex offender who admitted to publicly masturbating in three cities over a three-month period, exposing himself to 15 women, was sentenced Friday to two years and six months in prison.

Michael Dick, 54, also must serve two years of post-prison supervision and re-register as a sex offender upon his release. He pleaded guilty in February in Clackamas County Circuit Court to five counts of public indecency for incidents that occurred in Boring, Estacada and Damascus between October 2014 and January 2015.

Prosecutors dropped seven other counts against him, which carried allegations of similar incidents that occurred in February 2015 and March 2015, as part of a plea deal.

Authorities say Dick donned a wig, ditched all of his clothes and repeatedly pulled up to unsuspecting women in his black 2004 Chevy S10 pickup to expose himself. Some of the women had been out on walks in their neighborhoods when they encountered the nude man, others were at their homes. The women were between the ages of 35 and 82.

Dick's criminal history includes two convictions in Multnomah County for other sex-related cases. He was found guilty of public indecency in August 2008 and was sentenced to one year and four months in prison for first-degree burglary and attempted first-degree sex abuse. In that case, he broke into a woman's home while naked and tried to attack her.

Dick, who has Parkinson's disease, arrived in court Friday with his wife, their daughter and two of his sisters-in-law. He used a walker to reach a seat in the gallery, but later walked on his own to join his attorney at a table before Judge Douglas Van Dyk.

Dick's actions had a profound effect on his victims, said Clackamas County Deputy District Attorney Lewis Burkhart. Many of them "no longer feel safe in areas that they believed were their safe havens."

"Judge, this defendant's name is almost like some kind of low-hanging, bad joke," Burkhart said. "It's important to realize that this isn't a joke."

Dick could have stopped at any point but didn't until he was arrested, the prosecutor said. A Clackamas County probation officer wrote in a report that he believed Dick was aware of what he was doing and tried to cover it up by altering his truck and his appearance to avoid being recognized.

Every time Dick completed some form of formal supervision, the probation officer wrote, he reverts back to "doing what gratified him." He recommended a five-year prison sentence.

But Burkhart pushed for a 10-year term, saying it was necessary to protect the community.

"The only way to deal with this defendant now is to lock him up because, quite frankly, once he's off supervision we should almost just set another court date knowing he's going to be back in here," Burkhart said.

"We've lost hope in him."

Defense attorney David Lesh asked the judge to sentence Dick to 21/2 years of probation on electronic home detention due to his mental capacity and deteriorating health. He said his client would be vulnerable to abuse as a disabled inmate and will cost more to incarcerate.

Lesh attributed his client's behavior to his Parkinson's medication, which caused him to develop impulse control disorder. The attorney said research shows that the medication, dopamine agonists, can also alter behavior in other ways, such as gambling and theft.

"To say it just doesn't matter is like someone who takes one of those sleep medications that causes you to sleepwalk and say you can control it," Lesh said. "But you can't."

Dick was diagnosed with Parkinson's disease in 2001. He had no criminal history at the time. He began taking medication in 2005.

"People don't just develop sexual compulsions when they're in their mid-40s," Lesh said. He said the medication led to the impulse control issues that led to the burglary three years later.

While on post-prison supervision in the Multnomah County case, Dick was not allowed to drive. A doctor suggested he have a neurostimulator implanted in his brain when his condition began to affect his ability to walk. He also said the implant would allow Dick to wean off the medicine.

But after Dick got the surgery, he remained on the medicine, though at a lower dosage, Lesh said.

Lesh said his client accepts responsibility for what he did, feels "deeply ashamed" and apologetic.

"I believe if you sentence him to a lengthy period of home confinement, where he cannot leave except for medical appointments, you will be able to protect the public," Lesh said. "There's no reason why he has to be behind bars with this medical condition."

Van Dyk said that while there was "no question" that Dick's Parkinson's treatment contributed to his sexualized compulsive behavior, but the evidence also suggests premeditation.

Records show a number of the women were stalked by Dick and some reported that he appeared to be smiling during his encounter with them.

Dick was aware of the side effects of his medications for a long time, Van Dyk said, but allowed his condition to get out of control.

"Ultimately, the responsibility comes back to Mr. Dick," the judge said.

A past psychology report done for Dick flagged driving as a trigger to his impulsive behavior, but he decided to drive anyway. It appeared, the judge said, that Dick's actions were a conscious choice.

-- Everton Bailey Jr.

ebailey@oregonian.com

503-221-8343; @EvertonBailey