After many gemology classes he went undercover as an expert thief named Donnie the jeweler. While in New York the FBI set him up an apartment and one in Florida. Pistone would target various restaurants and bars where known mafia or mob members would attend. When Pistone went under cover, the FBI erased any info on him. His co-workers, friends and informants had no idea what happened to him. In the beginning the plan wasn’t to penetrate the mafia but to penetrate the group that was stealing the vehicles.
The undercover operation was supposed to last six months instead it lasted six years. Pistone became an associate in the Jilly Greca’s crew in the Colombo family. His crew was mostly involved in high jacking vehicles and selling stolen merchandise. Since the FBI and the police departments had no real identity on who joseph really was they had his identity as Donnie Brasco. He later switched to the Bonanno family. One day he met his would be mentor in the bonnano crime family known as Benjamin