NEW ORLEANS (AP) — Lawyers for a former BP engineer convicted of trying to obstruct an investigation of the company’s 2010 Gulf oil spill plan to seek the disqualification of the federal judge who presided over the trial last month.

In an order, U.S. District Judge Stanwood Duval Jr. said he received correspondence Tuesday in which Kurt Mix’s attorneys argue for the first time that he must disqualify himself because a spill-related civil claim had been filed on his behalf last year.