Federal Bureau of Investigation

The law enforcement arm of the U.S. government that has responsibility for investigating violations of federal laws with the exception of those assigned to another federal agency. The FBI's jurisdiction includes a wide range of responsibilities among which are espionage, sabotage and other subversive activities, kidnapping, extortion, bank robbery, interstate transportation of stolen property, civil rights matters, interstate gambling violations, fraud against the government, and assault on or killing of the President or a federal officer.