FBI agents work for the Federal Bureau of Investigation, the law enforcement agency that investigates crimes under the authority of the US Department of Justice.Special agents make up about one-third of the staff of the FBI, and they investigate all crimes that fall under the jurisdiction of the bureau, including terrorism, cyber crime, public corruption, civil rights violations, white-collar crime, and organized crime. They also conduct foreign counterintelligence and assist state and local law enforcement agencies with laboratory examinations and fingerprint identification.