Salvatore "Sammy The Bull" Gravano Photo by Jeffrey Markowitz/Sygma/Corbis Onetime underboss of the Gambino family, who by his own admission committed 19 murders. In the early 1990s, he turned government witness and helped authorities convict 39 mobsters, including his former boss Gotti. After serving a five year sentence—about three months for each killing—he was placed in the federal witness protection program, but left and started a new life as a swimming pool installer in Tempe, Ariz.
