The Mob Der Pate von Manhattan (1998)

Sammy The Bull Gravano was mafiosi. He started out as a soldier, but his talent for murder, including the slayings of his best friends, his wife s brother and his own boss, Paul Castellano, saw him rise to underboss in the Gambino crime family. However, betrayals within the family saw him break the code of silence and became the highest ranking member of the mob to turn into a rat a rat in a suit, assisting the government to finally put away the Teflon Don, John Gotti.