New Canaan Police Department Composite

Sebastian Van Stockum -- the Connecticut man accused of killing his mom -- once took a high school Forensic class that had the trappings of a Jeffrey Dahmer crime scene with simulated blood splatter, dead bodies, and human skeletons, according to a former classmate.

The ex-classmate tells TMZ she was in the same Forensics class with Stockum back at New Canaan High -- where the lessons included blood-splatter experiments in which students would stand on tables with a ruler and squirt fake blood to study blood patterns. ncps-k12.org

Students also learned how to zero in on someone's time of death based on body temperature, as well as studying skeletons and bones, and even watching a documentary about human corpses. Other projects included breaki

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