Wasn’t a beautifully carved ceremonial bronze hatchet found on him?
It was a copper ax and it's discovery pushed the copper age back by 1,000 years.
Oetzi has DNA haplogroup 'K', same as Thomas Jefferson.
I don’t think a ceremonial burial would have laid him out in the position they found him in.
True, the murderer could have taken the possessions, but what if the other guy also died. The Ice Man was left alive, but barely, the other guy was in a lower elevation where the ice melted and the wolves carried him off.
Lots more possibilities that this article suggests.
BA