article: Special agent
links: United States Marshals Service Drug Enforcement Administration United States Post Office Department United States Environmental Protection Agency Internal Revenue Service United States Department of Justice U.S. Immigration and Customs Enforcement Naval Criminal Investigative Service Local government United States Department of State United States Forest Service States of the United States United States United States Department of Homeland Security United States Department of Health and Human Services United States Department of Commerce United States Department of Defense United States Department of the Interior Federal government of the United States FBI United States Department of Transportation United States Secret Service United States Postal Service Bureau of Alcohol, Tobacco, Firearms and Explosives Federal Bureau of Investigation United States Department of Agriculture United States Department of the Treasury United States Congress