A New Orleans law firm at the center of an investigation into misconduct surrounding the processing of payments from BP PLC’s Deepwater Horizon oil spill settlement must return $357,000 paid to a client based on allegedly fraudulent claims.

U.S. District Judge Carl Barbier ordered that shrimper Casey Thonn return the payments within 30 days. Barbier also found that the AndryLerner firm, which received $35,700 in fees, and principals Jonathan Andry and Glen Lerner were responsible for the restitution.