U.S. Fish and Wildlife Service - Law Enforcement Division
- The lead agency in the USA for wildlife and environmental law enforcement activity. Regulates the import and export of wildlife and wildlife products.
- http://losangelesle.fws.gov

U.S. Army Criminal Investigation Command
- Includes a directory of CID units, information on wanted suspects, agency history, recruitment and training information, FAQs, and links.
- http://www.cid.army.mil

United States Secret Service
- The Secret Service is charged with protecting the President and Vice President of the United States and also with various enforcement functions in the Treasury Department.
- http://www.secretservice.gov/

United States Postal Inspection Service
- Law Enforcement division of the United States Postal Service.
- http://www.usps.com/websites/depart/inspect/

United States Marshals Service
- The official online presence of America's oldest Federal law enforcement agency.
- http://www.usdoj.gov/marshals/

United States Department of Homeland Security
- A federal agency whose primary mission is to help prevent, protect against, and respond to acts of terrorism on United States soil.
- http://www.whitehouse.gov/homeland/

United States Coast Guard
- America's Maritime Guardian official site.
- http://www.uscg.mil/uscg.shtm

Treasury Inspector General for Tax Administration
- Governmental agency that is responsible for oversight of the Internal Revenue Service.
- http://www.treas.gov/tigta/

Official Directory of State Patrol and State Police
- A directory of State Trooper and State Police related Web sites for each of the fifty United States. Site includes a directory of official state agency websites for every state and a section dedicated to personal homepages of officers.
- http://www.statetroopersdirectory.com/

Federal Bureau of Prisons
- Official site of the United States federal correctional institutions and prisons. This site's features include an inmate information section, inmate locator, and a public information section.
- http://www.bop.gov/

Dept. of Veterans Affairs Police
- Information about Police and Security programs at the medical facilities of the U.S. Dept of Veterans Affairs. Includes information on the VA Law Enforcement Training Center and a frequently asked questions section.
- http://www1.va.gov/osle/

DEA's Diversion Control Program
- U.S. agency responsible for dealing with the problems of the diversion of controlled pharmaceuticals and the diversion of controlled chemicals. This site contains import and export narcotics information, as well as a section on drugs and chemicals of con
- http://www.deadiversion.usdoj.gov/

ATF Online
- The Bureau of Alcohol, Tobacco and Firearms (ATF) enforces federal laws and regulations relating to alcohol, tobacco, firearms, explosives and arson. Site includes crime alert information, as well as an image archive and a statistics section.
- http://www.atf.treas.gov/