Meanwhile, the Pentagon this week named a new chief defense lawyer for its trials at Guantanamo. He is Marine Corps Lt. Col. Dwight Sullivan, a reservist who worked for the American Civil Liberties Union’s Maryland branch for six years. In other developments, the Pentagon said it was unlikely the death penalty would be imposed in the first 12 cases at the prison camp. The trials of Guantanamo prisoners had been frozen for eight months until a federal appeals panel on Friday reversed a lower-court ruling that these so-called “military commission” proceedings were unlawful. The Pentagon says that hearings could begin in as early as a month.