http://usatoday30.usatoday.com/news/nation/2007-07-26-wrongful-conviction_N.htm

FBI special agents have the reputation of incorruptible, than the city polices, seen as corrupted and inefficient.

In real life hasn't been so, starting when the FBI of Boston made end up in jail four innocent who were criminals, but always innocent, to save Barboza and destroy La Cosa Nostra.

Gertner said Boston FBI agents knew mob hitman Joseph "The Animal" Barboza lied when he named Joseph Salvati, Peter Limone, Henry Tameleo and Louis Greco as Deegan's killers. She said the FBI considered the four "collateral damage" in its war against the Mafia, the bureau's top priority in the 1960s.

Then as the new danger are the drug cartels that have a economic resources from them that the American Mafia not even dreams, how many FBI agents turned out to be corrupt?

Knowned List of corrupt agents

John Connolly,allied of winter hill gang
Harold Paul Rico,allied of winter hill gang,Peter Limone, Henry Tameleo, Joe Salvati and Louis Greco, ends up in jail for fbi orders.