If he had killed his own troops or U.S. civilians either deployed or stateside then yes a Court Martial is in order. This is Afghanistan which is being fought like Iraq, like Nam, like Korea, where the armies hide in amongst the civilians homes and shoot from same. There is but one answer in these cases. Kill them one and all. If he suspected a Sniper in that area and took out what he saw as a target even if brass didn't approve he is a hero in my book. He saved lives.
If the pressures of his fourth deployment became too much and he finally "broke" under combat stress or PTDS Combat Fatigue etc he is still a hero in my book and does not deserve a Court Martial. He deserves help. Several Freepers know the man personally and one served with him on a deployment. I take their word as too his character as being far more credible than a Media Stooge going around the hood digging up dirt doing the enemies work for them.
One thing that does travel at the speed of light is what we called scuttlebutt that can mean a drinking fountain but is usually a term used to described gossip or rumors which travel at the speed of light. Rumors in units and on bases get around fast. Today a service member in Afghanistan can instantly call home, e-mail, or text home or media, almost any time as can a person on a ship at sea. This was not possible in wars before the second Iraq war. The media hears rumors and reports them as fact saying according too an unnamed source close to the White House, Pentagon, unit, or whatever related venue in question.
If he 'broke' (and that would be a good guess), then he indeed should get the help he needs. If there were other issues, then they need to be addressed honestly.
We have no disagreement on the media, and I understand your points about the necessity of waging war in a different manner. To that point, I would only posit the viewpoint that in wars such as WWII we had declared war on an entire country and were fighting against a legitimate military, creating a different scenario for the troops fighting it than we have in this war and the war in Iraq.
The war against Islamofascism is, IMO, a notably different situation, warranting its different treatment. I agree with General Petraeus in making that distinction, but understand that some with military backgrounds, such as yourself, do not agree.