WILTON - A Wilton family has filed a lawsuit against the town and its board of education,

The parents claim their 4-year-old daughter was sexually assaulted by a former staff member at Miller-Driscoll School.

A judge last month sentenced Eric Von Kohorn to two years in prison and ordered him to register as a sex offender.

He pleaded guilty to child pornography charges.

The family claims Von Kohorn took the victim into a bathroom in January 2013 and assaulted her.

The lawsuit accuses the school of negligence.

The parents  claim a staff member knew Von Kohoron was in the bathroom when he shouldn't have been.

It goes on to claim the school principal was notified immediately, but waited for days to notify the Department of Children and Families.