Just to clarify, I'm almost postive I read that the report that he was missing was filed the same day the 4 Marines were killed but he actually went missing about two days before. That, to my mind, makes it even more likely he may have had some involvement.
I just realized that may have sounded too accusatory and maybe I should back off for now. But the incident where the 4 Marine sniper unit was executed with clean shots to the head on a rooftop just seemed extremely odd to begin with. And with this apparent deserter, from the same 1st Marine Expeditionary Force, going "missing" at the same time... something's fishy.