I'm thinking of cases where head injuries either don't seem very severe and then the person dies(like Natasha Richardson) or if he didn't hit in the correct spot, he might not kill her. Then you have Gabrielle Giffords who was shot in the head and she is recovering pretty well considering. Just that head injuries aren't always predicable...this was in response to saying that he only wanted to hit her once or twice and didn't expect it to get messy.
Agreed, it is gory.
If JY did this, my main issue is conflicting theories that it was a. meant to only be strangulation(and not messy) or b. there was a weapon and he meant to beat her to death.
If the killer brought a weapon, it's hard to argue that it was only meant to be a strangulation. If I were thinking about killing someone with a weapon, especially beating them to death, I would anticipate some mess.
Which is why if I were JY and planning this, I would wear something other than my hush puppy shoes.
But more important is whatever the prosecution is trying to say regarding a weapon, which I can't remember right now.
Sorry if I'm not making much sense. I'm pretty tired