Just read about this case today, for the first time. Glad they finally identified the remains, though it's unfortunate that it's taken this long. Hopefully this will provide some closure for RBB's family/loved ones.
From reading the article(s) about this case, I don't think foul play was involved here - but of course there's no way to know for sure. I suspect RBB went camping alone - possibly on his way to look for work in Louisiana. He was relatively young, but I guess it's possible he had a heart attack/stroke. Or, maybe he had an accident of some sort that incapacitated him - and, with no one there to help him, may have succumbed to his injuries. If not those possibilities, it's also plausible that he was the victim of an animal attack?!