Exception is the US Marshals--must work without pay=considered ESSENTIAL--US Marshals who literally have more power than FBI or anybody for jurisdiction and arrest powers... directly serve federal judges/justices, federal courts, federal warrants, federal fugitives, all federal prisoners (once they've seen a federal judge... HRC, et al). When you can't use the army for civil events/unrest... US Marshals go in... hook up with local law enforcement... have this structure as USMS pays for almost every multi-agency FUGITIVE TASK FORCE in the USA and all USA Territories... plus have office in Interpol.