The family has my prayers. I wonder what is the standard? To me, if he was acting in good faith, he is innocent of manslaughter. Unless the prosecution could prove that he knew the Syrians were not planting a bomb, IMO he was totally within the rules of engagement.
Based on what's been reported so far, I'd say there is none. I hope this prosecution makes more sense when we've heard about the whole day's testimony.
BTW, I also agree with your tagline--and he can bring the Del-Tones with him!