Leah Millis/Reuters Brock Long, the head of the Federal Emergency Management Agency, is investigated by Homeland Security's internal watchdog and a congressional committee for the possible misuse of government vehicles. The watchdog, the inspector general's office, has turned the review over to federal prosecutors to determine whether any criminal charges are warranted, according to a person familiar with the probe. The agency is already under pressure after a grueling hurricane season last year that included Harvey, Irma and Maria.