Gotti (1996) on Netflix

Biopic of the infamous New York mobster from his beginnings as the leader of a crew to the heights of leading the Gambino crime family - to his eventual fall and imprisonment. Gotti is a good earner and is very close to Neil Dellacroce, the number two man in the family. When Carlo Gambino dies however, his decision to make Paul Castellano the head of the family doesn't sit well with Gotti and others. They all put up with it for several years but eventually, Gotti gets fed up with Castellano and has him killed, making himself head of the family in the process. Gotti was the subject of several Federal investigations but always managed to be found not guilty, earning the sobriquet The Teflon Don. Determined to get a conviction, the FBI finally manage to get him on tape not only admitting to crimes, but speculating on how he might have to do something about his right-hand man, Sammy "The Bull" Gravano. When presented with the information, Gravano makes a deal with the prosecutors and testifies against his one-time friend who is sentenced to life in prison without parole.