I know this is my own thread but I just have to comment here now that I think I understand much more about this. What I said when I made this original post is what I "felt" was right, although I did not know I was right. Now things have fallen into place and I can confidently say that I was correct in what I wrote here, although I did not know why. Let me clarify some things now. The head bash itself was accidental in nature. It was not intended for JBR to be hit so hard that it would crack her entire skull open but that is what happened. The head bash itself did not kill JBR, and had she been rushed to a hospital she might possibly have been saved. No, what killed JBR is having the rope tied very tightly around her neck afterward, strangling her to death. In the mind of the killer it was necessity that she die because if questioned by police about the incident she could and probably would reveal what had been going on at the parties (plural). She could not even go to the hospital for someone to see her condition and wonder how she got this way. To protect their secrets, she had to die.
Can you clue the rest of us in to what has "fallen into place" that "proves" this theory, please?