WASHINGTON (AP) — The capture of an alleged leader of the deadly 2012 attacks on Americans in Benghazi, Libya, gave U.S. officials a rare moment of good news. Now, they are preparing to try the captured Libyan in the U.S. court system and pledging to double down on catching others responsible for the deaths of the U.S. ambassador and three other Americans in the attacks.

U.S. officials said Ahmed Abu Khattala was being held on the USS New York, a Navy amphibious transport dock ship in the Mediterranean Sea. The officials spoke only on condition of anonymity because they weren’t authorized to discuss the Libyan’s whereabouts publicly by name.