A top congressional ethics official who oversees investigations into misconduct by lawmakers is accused in a federal lawsuit of verbally abusing and physically assaulting women and using his federal position to influence local law enforcement, according to a complaint filed in a federal court in Pennsylvania last month.

The ongoing lawsuit against Omar Ashmawy, staff director and chief counsel of the Office of Congressional Ethics, stems from his involvement in a late-night brawl in 2015 in Milford, Pennsylvania, and includes a range of allegations relating to his behavior that evening and in the following two-and-half years.