Interesting.
So the family returned around 10 and that is roughly JB's time of death? She was asleep in the car, correct, and they carried her to bed? Could she have already wet herself maybe still in the car, and this was discovered upon arrival at home? Just wondering.
I do not understand the quote by Burke on the tape. Could he have been shunted out of the rooms where any planning or searching or arguing or anything was going on, and he was wondering "what he did" to get sent away? (Hey, what did I do?" is a common refrain for kids getting sent to another room.)
Burke's comments are a bit of a mystery, but clearly he knew something wasn't right. It's almost like he didn't know, or was pretending not to know, the full extent of what happened to Jonbenet.
As for the timing, yea, it seems really unlikely that the coroner would pin the time of death to around 10 p.m. and the body would already have an odor by lunchtime if she was killed much later than that. Beyond that, I have no idea what happened. It just seems that she was killed in the full knowledge of the family.
John, Patsy and Burke couldn't possibly have been in bed in their rooms before 11 p.m. So they were very much awake and moving about when this happened...it would seem.