Pantana has some problems, he discharged thirty rounds into two men, then reloaded and discharged another 30 rounds into them. All Marine M-16s are max. 3 shot bursts, no full auto, that means he pulled the trigger 20 times on two targets at close range. That alone is a big problem for him even if they were armed and fired at him. After the first 2 or 3 trigger pulls he should have checked his fire, secured his perimeter to see his other Marines were and if there were any other threats. If he believed they were armed or had explosives he should have awaited back up, covering for other targets if he may have thought he was in an ambush. The excessive fire endangered other Marines responding to the engagement. This Marine officer was clearly not in control of the battlefield as he should have been. It is very unusual that an officer was the only one to engage fire, very unusual.
Finally, once the hajiis were restrained they are detainees, POW's perhaps and should never be cut loose while the battlefield is in flux. Since they are detainees he is responsible for their safety, you never allow detainees to re-enter the engagement.
"Coburn estimated that Pantano fired a full magazine -- 30 rounds -- from his M-16 rifle, then changed magazines and fired about 30 more. It remains to be proved - that Coburn's "estimate" of how man rounds were fired can be corroborated.
For the moment - he remains highly suspect...
Semper Fi