3. Juana Barraza
It is thought that Juana Barazza was traded by her alcoholic mother for three beers. The man who ended up with her subjected her to rape, from which she had four children. In 1990, Juana began killing older women (generally over 60 years old) who lived alone, by pretending to be a government official and gaining access to their houses, where she would kill and rob them. She was later arrested and charged with 759 years in prison.