NEW ORLEANS (AP) — A former BP engineer charged with deleting text messages about the company’s response to its 2010 oil spill in the Gulf of Mexico urged a federal judge Tuesday to sanction Justice Department prosecutors for allegedly withholding evidence in the case, a claim the prosecutors deny.

U.S. District Judge Stanwood Duval Jr. didn’t immediately rule on whether sanctions are warranted after one of Kurt Mix’s lawyers asked him to order prosecutors to turn over any evidence that could be favorable to his defense.