If you’re not careful, your gangland colleagues won’t just kill you. They’ll amputate parts of your body too.

That was the fate of mob captain Dominick “Sonny Black” Napolitano, who had to answer for FBI Special Agent Joe Pistone’s infiltration into his Mafia crew in the famed “Donnie Brasco” case of the late 1970s and early 1980s.

As detailed in the 1997 movie starring Johnny Depp and Al Pacino, Pistone posed as jewel thief Donnie Brasco in order to penetrate the Bonanno crime family crew led by Napolitano.

Pistone, played by Depp in the film, was eventually accepted by the members of the Brooklyn-based gang, including mentor Benjamin “Lefty Guns” Ruggiero, portrayed in the film by Pacino.

In the “Donnie Brasco” book that Pistone wrote with Richard Woodley, he lays out how he was able

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