The infamous betrayal of a Gambino crime family underboss marked a turning point in organized crime history, as a high-ranking mob figure became a key witness against his own boss in a landmark case. This controversial decision exposed deep divisions within the Mafia and reshaped federal prosecutions of organized crime. The fallout from this act of defiance continues to be studied as one of the most dramatic shifts in modern mob history. The full story reveals how one man’s choices upended decades of loyalty and secrecy in the underworld.


The saga of Sammy the Bull is perhaps the most notorious episode in modern mob history, with the Gambino underboss turning state's witness on his boss, John Gotti, in 1992.