A former top police official in Hopkinton, Massachusetts, was found guilty Friday of child rape charges.

The Middlesex County District Attorney's Office said a jury convicted former Hopkinton Police Deputy Chief John "Jay" Porter of three counts of child rape that occurred in 2004 and 2005 when he was a school resource officer.

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The victim, who was 15 at the time, was a student at Hopkinton High School. Prosecutors said Porter assaulted her off campus multiple times.

"The defendant in this case abused his position of power to take advantage of and manipulate a child to gain her trust before sexually assaulting her on multiple occasions," District Attorney Marian Ryan said in a statement.

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