By analyzing the skull, Black and colleagues were able to detail the various stages that led the Pict man to his brutal end.
"The first impact was by a circular cross-section implement that broke his teeth on the right side," Black said.
The blow was followed by another one in which the same weapon, used like a fighting stick, broke the jaw on the left. The third blow caused a fracture to the back of the head. The man likely fell from the blow to his jaw onto a hard object, perhaps stone.
"The fourth impact was intended to end his life as probably the same weapon was driven through his skull from one side and out the other as he lay on the ground," Black explained.
The fifth injury is believed to have come from a larger weapon, since "a hole, larger than that caused by the previous weapon, was made in the top of the skull," the researchers said.
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Black explained to Seeker that the man was likely unconscious during the fatal fourth trauma, which went through his temporal regions.
"I suspect that he was largely rendered unconscious from his second trauma which was the blow to his jaw. That would have knocked him down and he then hit his head," Back said.
Death came quickly for the unlucky man.
"From first impact to unconsciousness, it could have been just a very few seconds," Black said.
Why the man was killed remains a mystery.
"We have a man who has been brutally killed, but who has been laid to rest in the cave with some consideration - placed on his back, within a dark alcove, and weighed down by beach stones," excavation leader Steven Birch said.
According to Birch, the murder could have been the result of interpersonal conflict. A "sacrificial element relating to his death" is also possible, Birch said.
Ongoing analysis on the skeleton is expected to provide more details of the man's life and place of origin.