Salvatore "Sammy the Bull" Gravano (born March is a former underboss of the Gambino crime family. He is known as the man who helped bring down John Gotti, the family's boss, by agreeing to become a Federal Bureau of Investigation (FBI) government witness.
John Gambino is a made member of the Gambino crime family and part of the family's Sicilian faction known as the Cherry Hill Gambinos. He's a major figure in organized crime. His cousin Frank Cali is reportedly the new boss of the Gambino crime family.