NORWALK - A department head at Brien McMahon High School was arraigned in Norwalk yesterday for allegedly sexually assaulting a 17-year-old-student.

Police say they received a tip that John Tate, 54, was having an intimate relationship with the girl. Authorities say he also provided the girl with alcohol on at least one occasion.

The relationship took place both on and off school grounds, according to police.

Police say Tate is also under investigation by the Connecticut Department of Children and Families on related allegations.

He was released on $150,000 bond and is scheduled to return to Stamford Superior Court May 10.