Marshals are responsible for protecting court officers, witnesses, and federal court buildings. They utilize Fugitive Task Forces comprised of Deputy Marshal's and local law enforcement to capture wanted fugitives.
On Criminal MindsEdit
Agent Sam Kassmeyer was given the task of protecting Haley Brooks and her and Hotch's son, Jack, from serial killer George Foyet, until his murder in 100. Federal Marshals have also appeared as supporting characters in other episodes, including 3rd Life and The Silencer.