A head shot from a "high power" sniper rifle, gonna hit hard enough to fracture the skull, the deformity of the back of his neck could be bone or vertebrae. entrance could potentially be hidden in his hair line. Head shots that fracture skulls, tend to bleed out of every orifice ears, nose, mouth, exit wounds - if one was made; seen low cal rounds blow tops of the skull off and higher cal make no exit wounds, crazy shit. Retired Paramedic Anon