The Supreme Court of the United States Police is a federal security police agency that derives its authority from 40 U.S.C. § 6121. The Supreme Court Police enforces federal and District of Columbia laws and regulations, as well as enforces regulations governing the Supreme Court Building and grounds prescribed by the marshal and approved by the Chief Justice of the United States. The department's mission is to ensure the integrity of the constitutional mission of the Supreme Court of the United States by protecting the Supreme Court, the justices, employees, guests, and visitors.

The Federal Law Enforcement Training Centers serves as an interagency law enforcement training body for 105 United States government federal law enforcement agencies. The stated mission of FLETC is to "...train those who protect our homeland". Through the Rural Policing Institute (RPI) and the Office of State and Local Training, it provides tuition-free and low-cost training to state, local, campus and tribal law enforcement agencies.