Two theories I have heard are, that he was murdered, (probably for revenge as he was not robbed) or that he was a sacrifice of some kind.
Interesting. I enjoy the archeologists desire to make him into "someone". Given his age, he may have just died a natural death as he traversed from one site to another. If he had a bow, he WAS a hunter...at least for survival AND he was equipped for a "journey"....10 miles, 100 miles, whatever...
A find like this is certainly something to ponder but "what you see is what you get".