Answer:
I can give you a general idea...
Step-by-step explanation:
Maybe base the story off of two tribes. Otzi the Iceman could have been a leader of a tribe who was great enemies with another tribe close to the same mountainside. Otzi could have been forced to leave his tribe due to needing to find medicine for his ilnesses. Along the way he could have come across the opposing tribes leader, they could have gotten into a fierce battle and Otzi was assasinated by the opposing tribes leader.