Omar Khadr was confined.
Omar Ahmed Sayid Khadr ( born September 19 , 1986 ) is a Canadian who was detained at Guantanamo Bay as a minor and held there for 10 years . After being detained at Bagram , he was sent to Guantanamo Bay detention camps , in Cuba . He was imprisoned for throwing a grenade during the firefight that resulted in the death of an American soldier . He was the youngest prisoner and last Western citizen to be held by the United States at Guantanamo Bay . He was initially assigned to a maximum-security prison but moved to a medium-security prison in 2014 .