Jane Toppan - In Cambridge, Massachusetts, a nurse who murders at least 31 of her patients in a sadistic fashion for sexual pleasure. She was found not guilty by reason of insanity and was committed to an insane asylum. Dana Sue Gray - In 1994, Gray killed three women and severely injured another in Chowchilla, California due to a craving for power, a thirst for cash, and hatred of her mother. She was sentenced to life without parole. Christine Falling - In Perry, Florida, the 17-year-old unstable babysitter betrayed parents' trust by suffocating the children that she was supposed to protect during 1980 to 1982. She was sentenced to life without parole for at least 25 years.