Colleen Ritzer: A Killer in the Classroom // 656

In October of 2013, a 24-year-old math teacher stayed behind after classes at her Massachusetts high school to offer assistance to one of her students. But when she didn’t come home that night, police descended on the school, discovering disturbing surveillance footage and a truly horrifying scene left behind in the woods nearby. This is the murder of Colleen Ritzer.

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