I would think the Supreme Court Police could be combined with the Capitol Police and several others could be combined too. Does the EPA and the DOE really need their own swat teams?
https://mpdc.dc.gov/page/covered-fed...ement-agencies
11th Security Police Squadron, Bolling Air Force Base
Bureau of Alcohol, Tobacco, and Firearms (ATF)
Amtrak Police Department
Criminal Investigation Division, Internal Revenue Service
Defense Protective Services, Department of Defense Washington Headquarters Services
Drug Enforcement Administration (DEA)
Bureau of Engraving and Printing Police Force
Federal Bureau of Investigation (FBI)
Federal Protective Service, Department of Homeland Security
Government Printing Office Police
US Immigration and Customs Enforcement
Library of Congress Police
Marine Corps Law Enforcement
National Zoological Park Police
Department of the Navy Police Division, Naval District Washington
Naval Criminal Investigative Service
Postal Inspection Service, United States Postal Service
Office of Protective Services, National Gallery of Art
Office of Protective Services, Smithsonian Institution
Department of Protective Services, United States Holocaust Museum
Department of State Diplomatic Security
Supreme Court Police
United States Army Criminal Investigative Command, Department of the Army Washington District, 3rd Military Police Group
United States Army Military District of Washington
United States Capitol Police
United States Coast Guard
United States Customs Service
United States Marshals Service
United States Park Police
United States Postal Police
United States Secret Service
United States Secret Service Uniformed Division
Do these really need their own police?
Office of Protective Services, National Gallery of Art
Office of Protective Services, Smithsonian Institution
Department of Protective Services, United States Holocaust Museum