They would collaborate even if they weren't telling the truth.
White House Watched Benghazi Attacked And Didn't Respond 10/24/2012Looters ransacking the empty consulate discovered Ambassador Stevens lying unconscious from smoke inhalation on the floor and rushed him to a hospital where doctors were unsuccessful in saving his life. Not knowing who he was, they took a cell phone from his pocket and called numbers. By about 2:00 a.m. Libyan time, the American embassy received word he was dead.