NEW LONDON, Conn. (AP) – The family of a teenager who says he was sexually assaulted by a former dean of a Connecticut prep school has filed a lawsuit.

The lawsuit was filed Monday in Superior Court against The Gunnery school, 44-year-old former dean Robert Reinhardt, Head of School Susan Graham and Dana Jackson, a teacher.

It alleges that school officials knew or should have known about Reinhardt’s conduct and failed to promptly respond to sexual abuse allegations.

Reinhardt resigned two months ago amid allegations that he sexually abused three students. He was arraigned last week on charges including sexual assault.

School officials and Reinhardt’s attorney did not immediately respond to messages seeking comment Wednesday.