I'd like to go back to the neck wound, specifically the second one. I cant remember where I've seen this discussed on here, so I'll do it here.
Re the smear on the second wound, the fatal one, how did it get there? It's been said that it could have been made by a thumb, but whose thumb? Not Sheilas obviously. Jeremy's thumb? Why would he have touched the wound and smeared the blood? It must have happened straight after the shot because there is a flow of blood superimposed over the smear. Anyone touching that wound must have done so within a nano-second of the shot.
Someone suggested that the smear was made by the gun. I find that feasible, but was there any blood on the end of the rifle? Was there enough blood on the end of the moderator to account for it?