an administrative unit of government

a federal law enforcement agency that is the principal investigative arm of the Department of Justice

a center in the Department of Homeland Security that trains law enforcement professionals for more than seventy federal agencies

a law enforcement agency of the Treasury Department responsible for establishing and implementing policies to detect money laundering

the law enforcement and tax collection agency of the Treasury Department that enforces federal laws concerning alcohol and tobacco products and firearms and explosives and arson

the United States Army's principal law enforcement agency responsible for the conduct of criminal investigations for all levels of the Army anywhere in the world