This is exactly why ISIS are training and brainwashing children! I understand he was only 15, but when he threw the grenade during the attack by US ARMY (as to the best of my understanding) he acted independently. That's what I feel. If he was truly being forced, it was his opportunity to surrender.
Also, If the law allows you to have consensual sex at 16 and the age was increased from 14 to 16 in 2006 i believe, then why do you need to be 18 to be tried as adult for killing?
The reasons I think Canada apologized for first, not following the rules of torture and POW set by geneva convention. and secondly treatment of minors POW. CSIS and CIA were both in on the torture of Khadr and that is a clear violation of the rules. Canada got away easy with 10.5 million.