Episode 16 Colleen Ritzer In 2013, a shocking crime rocked the town of Danvers, Massachusetts.Colleen Ritzer, a beloved math teacher at Danvers High School was found savaged, raped and buried under leaves off the cross country path behind the school. Police followed the clues and quickly apprehended her killer–a 14 year old student. Philip Chism had no record, no behavioral problems, and no known motive to kill his algebra teacher–but he followed Colleen into a women's bathroom and cut her throat.The crime was planned, premeditated, and pure evil. And Philip wasn'tdone–he would attack someone again before he was locked away.