Having him alive will certainly help all involved to find out a great deal more about why this happened.

My initial response:

If he had no wife or children he was definitely unsupported in terms of stress management with no intimates monitoring his mental health.

Something about the army's management of psychiatric personnel is seriously lacking: poor screening, little followup on poor evaluations of performance, unwillingness to consider the efficacy of having a Muslim psychiatrist involved in helping soldiers in a war zone where the Muslim religion is a major issue...

So sorry this has happened. My heart goes out to those involved.