Jane Toppan once said that it was her greatest wish that she’d have killed more people than any man or woman who ever existed. While she didn’t quite reach her goal, Toppan’s 31 murder victims in 1885-1901 earned her a place in serial killer history. She killed patients when she worked as a nurse, poisoned her landlords, and murdered her foster sister. When she was discovered in 1901, she was found not guilty by reason of insanity and spent the rest of her life in an insane asylum in Massachusetts. She died in 1938 at age 81.