when do us marshals get involved in a case
United States Marshals Service The Marshals Service is the primary agency for fugitive operations, the protection of officers of the Federal Judiciary, the management of criminal assets, the operation of the United States Federal Witness Protection Program and the Justice Prisoner and Alien Transportation System, and execution of federal arrest warrants. Throughout its history, the Marshals have also provided unique security and enforcement services including protecting African-American students enrolling in the South during the civil rights movement, escort security for United States Air Force LGM-30 Minuteman missile convoys, law enforcement for the United States Antarctic Program, and protection of the Strategic National Stockpile.[5]