This is an excellent rendition of the debate we have been having on here about the order of the wounds.
I don't know who Dr. Terry is--another medical examiner? But, he disagrees with the ME in this case, and says the gunshot wound was first.
Dr. Horn believes it was last because lack of evidence of bleeding, but decomposition hindered efforts to determine the nature of that wound. Also, Dr. Terry says that if the jugular wound or the vena cava wound came shortly afterwards [which we know it did] there would be little time to bleed into the head, etc.
The big problem for me with the head shot first is that I would expect him to lose consciousness. But, given the small caliber of the bullet and the fact that it was on the periphery of the brain, maybe he could recover enough to make the effort to protect himself with the defensive wounds.
The biggest hurdle for me is how she managed to disarm his abilities to protect himself from her so quickly. The only other wound, other than the gunshot wound, that would so thoroughly accomplish this is the wound to the neck but we know that didn't come first. Otherwise, I think he could have stopped her had he sustained any of the other wounds first.
So, that's it. I'm going with gunshot first and then the toy gun jammed so she switched weapons. And, that, my friends is all you need for premeditation.
IMO