NEW : Plea deal includes an eight-year prison sentence , source says . Omar Khadr , 24 , accused of throwing a grenade that killed a Special Forces medic in 2002 . Khadr , the youngest detainee at Guantanamo Bay , was 15 at the time . Khadr was born in Canada , which held negotiations over his plea . The Canadian government has said it will not comment on the case until after sentencing is handed down.
NEW : Plea deal includes an eight-year prison sentence , source says . Omar Khadr , 24 , accused of throwing a grenade that killed a Special Forces medic in 2002 . Khadr was born in Canada , which held negotiations over his plea . The Canadian government has said it will not comment on the case until after sentencing is handed down.