100% of trophy heads suffered trauma before they died.

All of the trophy heads are adult males, and all of them suffered trauma before they died. Most of the wounds had time to heal before death, but this man suffered a sharp force trauma to his right mandible that cleaved all the way through the bone. Because the margins of the wound are still sharp and jagged, we know the injury didn't heal before he died, and he received this wound around the time of death. This high rate of injury for the trophy head victims shows they were involved in violence before they were crafted into trophies, supporting the war captives theory.