Now figure out the differences between BATF, FBI, the Secret Service, the US Marshals, the Tribal Police, the Texas Rangers and the Texas Highway Patrol, DEA, the railroad police, the shore patrol, the military police, the air police, BIA police, and the police authority of Customs, the Coast Guard, campus cops, and about a million other police agencies.

Then we can take a flier at various non-police security services....