A top official in the office tasked with investigating allegations of misconduct on Capitol Hill is the subject of a federal lawsuit that claims he physically and verbally assaulted three women at a restaurant in 2015.

Gregory Martucci, a former federal air marshal, filed the lawsuit against Omar Ashmawy, the staff director and chief counsel of the Office of Congressional Ethics, in federal court in September. The lawsuit focuses specifically on a fight that occurred Feb. 14, 2015, at the Dimmick Inn in Milford, Pa., and the events following the brawl.