On January 11, 1996, this 64-year-old Austrian widow confessed to killing five people and is believed to be responsible for more deaths in a killing spree spanning over a decade. Dubbed the "Black Widow" by the press, she confessed to murdering her husband, two former lovers and two other men because "They deserved to die." An obsessive gambler, authorities believe she killed to fuel her expensive addiction.

Her first victim was the janitor of her apartment building who, in 1981, she "helped commit suicide" because he was abusing his wife and children. All her victims were poisoned with fatal doses of medication. One octogenarian would-be-victim died of cancer before she could kill him. However, the resourceful criminal, she falsified his will to pocket a $15,000 inheritance.