It said he took an arrow to the back but died of a head injury. Do you suppose the arrow was still in his back? Otherwise how would they know about the arrow?
Oetzi bled out from an arrow wound, the flint head was still in his body.
http://www.iceman.it/en/how-oetzi-died
http://news.nationalgeographic.com/news/2007/06/070607-iceman-murder.html
It’s interesting to think that he was one of a group, and since his death was probably within minutes, if the rest of the group was also killed, there may be more such finds in the Alps’ nooks and crannies.