Tammy Duvall, Husband Killer

When Alan Duvall died in August of 2007, his family wasn't satisfied with the initial explanation. Three years later, their doubts were put to rest when authorities arrested his estranged wife, Tami, and charged her with murder, insurance fraud, and obstruction of justice... According to Bartholomew County prosecutors, Tami was hoping to cash in on a life insurance policy that had been taken out on her husband in the amount of $100, 000 - and she decided to poison her husband using stolen medications.