Since you are speaking from the IDI standpoint, I am not sure what your point is. However, Ill ignore your sarcasm (more appropriate on the IDI thread, btw) and respond that some RDI believe that the doctor was called. That fact is unknown as the DA refused to allow an immediate warrant for their phone records. Some also believe, as Kolar indicated in his AMA, that it is possible that the person (one of the Rs according to RDI and Kolar) who struck her also was responsible for her strangulation. If that was the case, then the decision to stage for an intruder is perhaps made more easily. (Just a matter of enlisting the support of the other adult in the family.) This is a Sophies Choice kind of decision.
Even though they have attorneys before the end of the afternoon of the 26th, the Rs still do not know what will happen, and all of their fears would still be in play. One of them may even have decided itd be best to blow out of Dodge, so to speak. Go to a business meeting. Or take enough drugs, as in Patsys case, to be rendered incoherent.
Ill add that some MEs with long-term backgrounds in child deaths, maintain that in accidents parents will still call an ambulance, even when a child is clearly deceased.