re: ISIS leader a former US Detainee?

The first problem is that we never properly classified the detainees properly. Those who were engaged in armed combat against our troops, and were not wearing uniforms or other items to visibly identify them as combatants from a distance, should have been treated as unlawful combatants and been dealt with accordingly. Collect whatever useful intelligence you can from them, and them punish them to the full extent of the laws we have adopted for ourselves. This would have allowed for their execution or other lesser punishments deemed appropriate.

All that the Laws of Land Warfare required of us was that we held a competent tribunal to determine that captives were not entitled to prisoner of war status. A competent tribunal could have been nothing more than a review of the circumstances of capture by the local commanding officer based on interviews with participants in the actions leading to the capture.