Even if Khadr killed him what is your point? The Americans killed everyone else in the compound and tried to kill Khadr. That is war. There is no legal liability if you kill your opponent. The whole "military medic" angle is a crock. These were all Delta Force soldiers going in. They signed up for the military acknowledging that they may die on the battlefield. Khadr fought on the other side as a child soldier. He has no legal liability to anyone and has repeatedly won at the Supreme Court of Canada.