連邦捜査局
a bureau of the U.S. Department of Justice that investigates violations of certain federal statutes, called the Federal Bureau of Investigation
in the Department of the Treasury of the United States, an organization called {the secret prosecution}
the department got a good comb-out
in the public prosecutor's office, a criminal investigation unit called the special investigation section
a federal law enforcement agency that is the principal investigative arm of the Department of Justice
the executive and legislative and judicial branches of the federal government of the United States