If memory serves me well, this guy killed an SF medic that was making rounds to all wounded (friendly and foe) in the middle of a fierce battle at risk to his own safety. He had treated this scumbag and was returning to check on him when the ‘kid’ pulled a weapon mortally wounding the sergeant.
IMHO, he does not deserve to ever be free.
Regards.
If the case is as you stated then fair enough (although simply putting him against the wall and summarily executing him would have been more effective) but I would hate to see the situation arise where we regarded killing a soldier in combat as “murder”, that would be a seriously dangerous two edged sword that would be sure to come back with a vengeance.