He confessed to 19 murders. He worked his way up to become the underboss of the Gambino crime family in New York. He ratted out Mafia boss John Gotti to the government, and witness protection brought him to Arizona. Now, he’s sharing mob secrets including details surrounding JFK’s assassination, how they pulled off high-profile hits, and where his life and legacy in U.S. history stands now. This is the story of how “Sammy the Bull” became one of the most prolific Mafia hitmen to ever live.