"I've not heard anyone claim that she died from the head injury and then was strangled."
I agree. But I also think that some experts are not willing to exclude the possibility either. I think that's the catch-22 in this evidence: it's not really clear (or certain) what the sequence of events, and their causes, was. I think any one of these scenarios is more or less equally feasible provided the strangulation and head trauma occured within about 30 minutes of each other.
My last post has a good link that delves into this debate.
I looke at that, thanks.