andreww,
The parent never accomplished, even minimally, what they set out to do, i.e. assuming PDI. Patsy left the breakfast bar with pineapple and glass tumbler out on full view. JonBenet's bedroom was a total mess, just what you might expect if it was the primary crime-scene. Patsy redressed JonBenet in BR's long johns and over sized Bloomingdales, despite have a complete wardrobe available in her bedroom.
The parents arrived late at the crime-scene likely JonBenet's bedroom, i.e. she was sharing a bed, so made quick decisions on cleanup and the relocation of JonBenet's body.
UKGuy,
Not sure what evidence there is to suggest that the bedroom was the crime scene? It was a mess because the family were slobs. In all likelihood Patsy was in JARs room packing, so it would have been difficult for a situation to get that far out of hand. The fact that the flashlight likely is the weapon used suggests to me that the kids were in the basement.
Because, assuming as per Kolar BDI All, BR ligature asphyxiated JonBenet but Patsy contrived the ligature plus paintbrush so to incorporate the paintbrush into a fake crime-scene, thereby allowing the missing piece of paintbrush to be removed, probably because it was bloodstained from being used to assault JonBenet?
Not sure how Patsy's fibres being all over the cord show that she only put the handle on it? If the motive was to simply dispense of the tip, why not break it off and take it with you? The brush handle simply leads investigators in the proper direction. Would that piece of cellulose found in JB have lead them to the paintbrush? Likely not. But I do believe that Patsy was simply recycling items that had already been used.
Just because Patsy's fibers are on the ligature, it does not follow she killed JonBenet!
Doesn't mean she didn't either.