DR KLEPP
There was blood in the air ways which could have come from the head.  In other words with the gunshot wound to the head, the skull was fractured and blood could then have passed down through the back of the throat.
	Another possible sight of where the blood could have originated is when one has sustained a severe gunshot wound to the head you actually get shunting of blood from the periphery of the body to the lower pressure system of the lungs and exudation of blood into the secretions.  So it could either have come from below or from above.