No, his records show he never left the ship at Haiti so no dead Haitians and no combat, either.
It isn’t his record that shows that he never left the ship, it was statement by a Sergeant in his battalion saying that only ‘03s (grunts) would have gone.
That may or may not be true. Lots of guys in disaster relief are doing things way outside their MOS.
And actually, knowing Marines rather intimately, I would be surprised if H&S stayed on the ship, eating hot Navy chow and sleeping in a rack while grunts got to go police up all the dead bodies.
Could be proven wrong, but unless he had a damn good reason to be left on a ship, they would have been very likely to send bodies that had no urgent duty remaining aboard.
The matter should be easily proven soon though, one way or the other by the defense. It wouldn’t be possible for him to have gone ashore for a solo foray with nobody else knowing.