In 2012, a routine arrest led to one of the most chilling confessions in FBI history. Samuel Little, once a drifter with a long rap sheet, began to talk. And what he said stunned investigators. Ninety-three murders. Mostly women. Many forgotten by the system. He remembered their faces, their names, where he left them. He even drew them from memory. The accuracy was uncanny. The FBI has now verified over 60 of his confessions. He may be the most prolific serial killer in US history. Samuel Little