MILTON (CBS) — The attorney for a Milton High School teacher said prescription drugs was at the root of his arrest.

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A 14-year-old student has accused 64-year-old Dale Snyder of sexual assault.

According to police, On June 2, Snyder and the student were helping put away chairs after graduation, when the teacher invited the girl back to his classroom.

There, according to the girl, Snyder put his hand on her leg, then kissed her several times. He’s now charged with indecent assault and battery on a child over 14 and assault and battery.

Snyder’s attorney Thomas Lawton said his client suffers from Parkinson’s Disease and the medication he takes may cause impulsive behavior.

Lawton, said while his client is not admitting to anything, they may work a medical defense into the case. (Continued…)

“Not only does the disease, but some of the medications result in this type of behavior which I think you can find on any web search,” Lawton said. “He’s got increased libido, and impulse control issues.”

Snyder was arrested Friday, at his Abington home and held on $25,000 bail over the weekend.

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Snyder was expected to post his $10,000 bail after his arraignment.

Lawton said in the 27 years Snyder has worked at the school, there has never been a complaint against him.

Snyder was inducted into the Massachusetts State Track Coaches Association Hall of Fame in 2009.

The group’s president says the allegations are out of character. “Nothing but positive things to say so I’m at a loss for words,” said Jim Hoar. “I just don’t understand it.”

WBZ NewsRadio 1030’s Ben Parker reports

Snyder is due back in court in August.

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WBZ-TV’s Bill Shields and Michael Rosenfield contributed to this report.