Question: Which of the following are true of the U.S. Marshals Service? (Check all that apply.) Multiple select question. The mission of the U.S. Marshals Service is the protection of the president, his or her immediate family, and the president-elect. One of the Marshals' first law enforcement duties-one they still perform today-was to conduct executions authorized by the federal courts. Throughout their more than 220-year history, U.S. Marshals and their deputies have been "general practitioners within the law enforcement community." The primary responsibility of the U.S. Marshals is detecting persons perpetrating frauds against the government. The U.S. Marshals are not restricted by legislation to specific, well-defined duties and jurisdictions.