A videotape showing a 16-year-old boy held at Guantanamo Bay in Cuba, emerged on television Tuesday, according to dpa. The images were of Canadian citizen Omar Khadr pulling open his shorts to show his interrogator the wound he received while fighting in Afghanistan. Khadr, now 21, has been charged with throwing a grenade that killed an American soldier in Afghanistan. His trial is scheduled to begin in October. He was taken into custody by US forces in 2002, when he was 15, and has been held at Guantanamo since. A CNN correspondent said the video also shows Khadr sobbing uncontrollably while being questioned by a Canadian officer. The videotape was provided by Khadr's defence attorneys.