Slahi was assigned detainee ID number 760 and was initially held in Camp Delta. Officials belonging to the CSIS interviewed Slahi in February 2003. He was among 14 men classified as high-value detainees, for whom United States Secretary of Defense Donald Rumsfeld authorized use of what were called extended interrogation methods, which have since been classified as torture. By January 2003, US military interrogators pressed to make Slahi their second "Special Project," drawing up an interrogation plan like that used against Mohammed al-Qahtani. Declassified documents show that Slahi was transferred to an isolation cell near the end of May and abusive interrogation started. He was subjected to extreme cold and noise, extended sleeplessness, forced standing or other postures for extended periods of time, threats against his family, sexual humiliation and other abuses.