A Danvers teen is guilty of raping and murdering his high school math teacher in 2013 then disposing of her body in a wooded area, a jury ruled Tuesday, the Boston Globe reported.
Philip Chism was charged as an adult in the murder of Colleen Ritzer, 24, who had been a popular teacher in Danvers, about 20 miles north of Boston.
He faces a mandatory sentence of life in prison without parole.
Chism's attorney had argued that Chism, a freshman at the time, attacked Ritzer on Oct. 22, 2013, due to mental illness, but prosecutors painted the teen as a remorseless killer.
Prosecutors said Chism followed Ritzer into the bathroom after school, raped her, cut her throat with a box cutter and transported her body off campus in a recycling receptacle.
Chism also stole Ritzer’s credit card, which prosecutors say he used to buy fast food and a ticket to a movie at a mall.
Chism was acquitted of raping Ritzer with a tree branch in the woods, the Globe reported.
A Topsfield police officer who found Chism walking along a rural road the night of Oct. 22 testified that he noticed blood on Chism’s clothing after bringing him to the police station.
Reuters contributed to this report.