On June 23rd, 1902, Jane Toppan was finally convicted of killing at least 11 people while working as a nurse in Eastern Massachusetts. She was declared guilty by reason of insanity for her crimes, getting pleasure toying with her victims by poisoning them before finally allowing them to die. She spent years discretely killing people and there's a chance she actually murdered nearly 100 people though it was never confirmed. Did the trauma of her earlier years turn her into a killer? 

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