Massachusetts teacher Colleen Ritzer's baffling death: 'It just doesn't add up' – The Mercury News
Philip Chism was only 14-years-old when he followed his algebra teacher Colleen Ritzer into the schools bathroom. Once he was inside, he attacked her with a box cutter, raped, robbed, and killed
Mother of teen accused in Danvers high school slaying 'struggling to understand'
crustygutterpunk (u/crustygutterpunk) - Reddit
True crime: The horrific murder and rape of Colleen Ritzer a teacher in Massachusetts who was murdered by her own student on school grounds during school hours. : r/massachusetts
The in school murder of teacher Colleen Ritzer by her 14 year old student : r/MysteryMedia
The Disturbing Case of Colleen Ritzer : r/boston
Sentencing of teen who savagely raped, robbed then murdered his high school algebra teacher. "The crashing waves of this tragedy will never wane", said judge who then handed down the maximum allowable
Mass. teen indicted for rape, murder of teacher
Slain Danvers teacher's family speaks out – Boston Herald