United States Federal Protective Service

The United States Federal Protective Service (FPS) commonly referred to as the Federal Police is a federal law enforcement agency of the United States Department of Homeland Security (DHS). The Federal Protective Service is also the federal agency charged with protecting and delivering integrated law enforcement, investigative, and security services to federal property, critical infrastructure, federal employees, and large scale public events.

Source: Wikipedia — United States Federal Protective Service (CC BY-SA 4.0)