The WikiLeaks Guantanamo Files database has some significant omissions, not least the misidentification of detainee 990 as someone else. Detainee 990 was really Abdurahman Khadr and a CIA asset sent to Guantanamo to spy on his brother Omar Khadr and other prisoners. Another missing file concerns former U.S. citizen Yaser Hamdi, whose case was famously taken all the way to the Supreme Court.