The former Hopkinton Police deputy chief is accused of raping a child while he was a school resource officer in the town’s school system, according to police.

A Middlesex grand jury has indicted 54-year-old John “Jay” Porter on three charges of rape of a child, the Middlesex District Attorney’s Office announced on Monday.

Porter allegedly assaulted a 15-year-old student in 2004 and 2005.

He’s accused of assaulting the student multiple times off school property.

This investigation has been handled by the Middlesex District Attorney’s Office and Massachusetts State Police.

As of Friday, April 28, Porter is no longer a member of the Hopkinton Police Department.

The arraignment has not been scheduled yet.