Joseph Dominick Pistone is an American former FBI agent who worked undercover as Donnie Brasco between September 1976 and July 1981, as part of an infiltration primarily into the Bonanno crime family, and to a lesser extent the Colombo crime family, two of the Five Families of the Mafia in New York City. Pistone was an FBI agent for 17 years, from 1969 until he resigned in 1986. The evidence collected by Pistone led to over 200 indictments and over 100 convictions of Mafia members, and some responsible for his infiltration were also killed by other mobsters.

The Bonanno crime family is an Italian-American Mafia crime family and one of the "Five Families" that dominate organized crime activities in New York City, and in the United States, as part of the criminal phenomenon known as the American Mafia.