MILFORD, Conn. (AP) A Connecticut teenager accused of stabbing a classmate to death on the day of their prom is due in court for a pretrial hearing Tuesday.

Seventeen-year-old Christopher Plaskon is charged with murder in the slaying of 16-year-old Maren Sanchez in a hallway at Jonathan Law High School in Milford in April 2014.

Plaskon's attorney, Richard Meehan, said Monday that his client will use an insanity defense. He did not elaborate but he has said Plaskon was taking anti-psychotic medications.

The hearing Tuesday is scheduled for Milford Superior Court.

Plaskon, who is detained on $3 million bail, is being tried as an adult and faces up to 60 years in prison if convicted of murder. He has pleaded not guilty.