Philip Chism HS Killer Convicted

© Ken Yuszkus/The Salem News/Pool via AP

Jury finds Massachusetts teen guilty in teacher's 2013 murder - A Massachusetts jury on Tuesday found a teenager guilty of raping and murdering a math teacher at his suburban high school in 2013, after about nine hours of deliberations.

In finding 16-year-old Philip Chism guilty, the jury rejected the defense's argument that he was suffering from a psychotic episode at the time of the 2013 attack and therefore not criminally responsible for his actions.

Chism was 14 when he committed the killing at his high school in Danvers, Massachusetts, north of Boston. But he was tried as an adult and could be sentenced to life in prison.

Prosecutors presented voluminous evidence during the month-long trial, including school surveillance videos, to support allegations that Chism followed his teacher, Colleen Ritzer, 24, into a bathroom after school, strangled and raped her, and carted her body in a recycling bin to a wooded area off campus.

The trial at Essex County Superior Court in Salem, Massachusetts, was occasionally delayed by Chism, who at one point refused to return to the courtroom after a break telling his attorney that he was "about to explode."