Joseph D. Pistone (born 1939), alias Donnie Brasco, was an FBI agent who worked undercover for years to infiltrate the Bonanno family, a branch of the Mafia in New York City.
Pistone's performance was so convincing that, at the time the operation ended, he had been proposed to become a "made man" (officially inducted into the Mafia).
Pistone continues to be active as an author and consultant to worldwide law enforcement agencies.
Unlike the movie, FBI Agent JoePistone was never witness or took part in the murders of Indelicato, Giaconne and Trinchera.
FBI agent JoePistone, undercover with the mob as "Donnie Brasco," was tasked with finding and killing Bruno, which quickened Pistone's being removed from the operation.
Joe Massino, who later became boss of the Bonanno Family, was convicted in 2004 of ordering seven murders, including those of Indelicato, Giaccone and Trinchera.