Friend found this in a deer he harvested with a rifle. He took it to the state Fish & Game Dept dept to show them.
The field pathologist looked at it, and felt it had been in the scull 1 or 2 seasons
The broad head point on the brain side was only protruding 2-3 MM. He said they see this a lot. He said I bet that was a hell of a headache until February
As a bow hunter I hate to see this type of thing. Couple More foot pounds of energy would have turned the deer off like a switch.