United States Federal Judicial Department

The Courts of the United States is composed of the Courts of the various States and the Federal Court of the United States.

As there are no Federal-level trial Courts, or any Federal-level Court other than the Federal Court (which is a court of last resort and final constitutional court for matters of Federal law), all Federal offenses are prosecuted in State Courts; however, federal prosecutors (called, "Advocate-General", part of the United States Advocate-General's Office, the federal agency responsible for the Federal prosecutor corps), not State prosecutors, try Cases involving offenses under Federal law. The United States Advocate-General's Office is led by the Advocate-General, who is officially an Assistant Attorney-General in the United States Department of the Attorney-General.