When FBI Special Agent, Joe Pistone began what was supposed to be a six-month operation infiltrating New York's Bonanno crime family in 1975, he had no idea what was about to happen. Posing as jewel thief Donnie Brasco, Pistone would spend the next six years undercover in the Family, witnessing - and sometimes participating in - the Mafia's gruesome activities, while gathering enough evidence to send over 200 gangsters to jail. Pistone told his story in the 1988 book "Donnie Brasco" - a "New York Times" bestseller, which was made into a feature film starring Johnny Depp and Al Pacino. But, because of pending trials at the time of publication, many details of alleged crimes were omitted. Now, in "Donnie Brasco: Unfinished Business", Pistone for the first time reveals with great detail the horrific deeds of wise guys Tony Mirra, Lefty Ruggiero, Sonny Black and the rest of the cold-blooded Bonanno crew. He puts the operation into historical perspective, detailing the timeline of Mafia trials from 1981 to 2005, which crippled the New York City crime family.