The Federal Bureau of Investigation (FBI) is the primary investigative arm of the United States Department of Justice (DOJ), serving as both a federal criminal investigative body and a domestic intelligence agency. At present, the FBI has investigative jurisdiction over violations of more than 200 categories of federal crimes, making the FBI the de-facto lead law enforcement agency of the United States government. The motto of the bureau is "Fidelity, Bravery, Integrity".

The FBI, along with the ATF, were responsible for the both 1992 sniper-murders of Sammy and Vicky Weaver at Ruby Ridge and the 1993 massacre of 82 innocent people, including children, in Waco, Texas.

The FBI headquarters is in Washington, D.C., but they have a branch office at 26 Federal Plaza in New York City. The Irish mob of South Boston actually managed to have a mole in the FBI, unlike anything the Italian Mafia could achieve.

Known FBI Agents Edit

Recurring AgentsEdit

Actor Character First
Number of
Marcia Gay Harden Federal Bureau of Investigation
(F.B.I.), Counterterrorism Division
(C.T.U.) / Behavioral Analysis Unit
(B.A.U.) Special Agent Dana Lewis
(Season 7)
"Secrets Exhumed"
(Season 14)
David Dollase Federal Bureau of Investigation
(F.B.I.), Counterterrorism Division
(C.T.U.) Special Agent in Charge
(S.A.C.) Lockwood
(Season 8)
(Season 8)
Vincent Spano Federal Bureau of Investigation
(F.B.I.), Counterterrorism Division
(C.T.U.) / Sexual Offender Fugitive
Apprehension Unit (S.O.F.A.U.)
Special Agent Dean Porter
(Season 8)
(Season 11)
Frankie Faison Federal Bureau of Investigation
(F.B.I.), Hostage Rescue Team
(H.R.T.) / Behavioral Analysis
Unit (B.A.U.) Special Agent in
Charge (S.A.C.) Tom Nickerson
(Season 8)
(Season 9)
Frank Deal Federal Bureau of Investigation
(F.B.I.), National Center for Missing
and Exploited Children (N.C.M.E.C.)
Special Agent O'Connell
"Friending Emily"
(Season 14)
"Chicago Crossover"
(Season 16)

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