I'm sure every one of us, at some point in time, plays with Kaleidoscope, right? As it turns,
the same bits of colored glass creates different picture with the help from the mirrors...the same happens in this case: our mind (as the mirror) reflects the same evidences/facts into so many different scenarios. Here is mine 'kaleidoscope':
First turn.....
IF
SEX is the foundation THEN
acute injury was done first;
head injury was done second;
person who's capable to do the first and second is capable to do
the STRANGULATION!;
everything else is 'staging'
ENDIF
Second turn.....
IF
ACCIDENT is the foundation THEN
head injury was done first;
acute injury is 'staging' to cover the prior chronic abuse;
strangulation is 'staging'
ENDIF
...my 'kaleidoscope' is still turning
....
I like the kaleidoscope analogy, but as I turn it, it shows this -
First turn -
If sex is the foundation, the head injury is an accident giving rise to the need for killing/staging. The acute abuse is staging. (There could have been two episodes of acute abuse, one "real" and one staged, after the accident, to obscure long term abuse) Otherwise, go on abusing as before w/o consequence. I think it's pretty unlikely a 6 year old stood up to an adult abuser and threatened to tell. And even if that happened the adult abuser has less drastic ways to deal with the situation.
IOWs if she was killed to cover chronic abuse, an adult was the abuser and killer, and he did it after an accident happened. Most abusers don't kill their victim, they just go on abusing. An accident is the only reason this night turns out differently than many previous nights.
Second turn-
If the head injury was an accident, and BR is the long term digital abuser, then an ambulance is called. They try to explain the head injury as an accident-kids horsing around. They explain the abuse as "playing doctor". They do not risk loosing everything to save BR from - no legal consequences at all.
Third turn-
The head injury wasn't an accident. Some one wanted her dead and ruthlessly bashed her skull with a golf club as the preferred method of killing. Ligature is staging and unintended actual cause of death. Acute abuse is staging.