Omar Khadr has always been free.
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 . 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 accepted an eight-year sentence , not including time served , with the possibility of a transfer to Canada after at least one year to serve the remainder of the sentence . His conviction and sentence were widely denounced by civil rights groups and various newspaper editorials .