On 18 January 2010, Scott Horton of "Harper's Magazine" published a story suggesting that al-Salami, Al-Utaybi and Al-Zahrani had died as a result of accidental manslaughter during a torture session, and that the official account was a cover-up. Horton had undertaken a joint investigation with NBC News, based on an account by four former guards at Guantanamo Bay detention camp. They suggested that the men had died at a black site, informally called "Camp No," used for interrogation including torture. It was located about a mile outside the regular camp boundaries.