A federal judge in Rhode Island referred a Justice Department lawyer for investigation into possible misconduct after he withheld details about a detainee’s overseas arrest warrant.

Kevin Bolan, who serves as the civil division chief of the U.S. Attorney’s Office for the District of Rhode Island, revealed he failed to disclose full case details to U.S. District Judge Melissa DuBose. The case pertains to an immigrant from the Dominican Republic who was arrested and subsequently released by the judge.