NEW YORK (AP) — Lawyers for the New York Police Department say the department should fire a police officer who dropped his cover and touched off the fatal shooting of an unarmed man after his bachelor party.A departmental trial is being held for Detective Gescard Isnora (JEHS'-kard ihz-NOR'-uh) and Officer Michael Carey in the 2006 shooting of Sean Bell and his two friends.Isnora says he believed Bell's friend had a gun. He said he came out of his undercover role and fired because he had no other choice.Department officials said Wednesday that Isnora wrongly fired and wrongly dropped his cover. They say Carey wrongly fired because Isnora did.A department judge will review the case and make a recommendation. The police commissioner ultimately decides whether and how to discipline the officers.