PR can only be placed at the crime scene in the sense that the entire house, and it's yard is a crime scene. In a previous reply I'd said wearing the same clothes was suspicious. Upon further reflection and reading dogG's blog, I have to change my opinion. If PR was involved why would she risk being seen in the same clothes - that naturally makes everyone assume she was up all night doing the criminal acts (either murder and staging, or at least staging)
There was no deadline for making the 911 call. She could easily have showered and changed, then made the call at say 6:30.
JR was the one who showered in the morning.
As an aside, and as proof of nothing at all, I always shower before going to bed. Why go to bed dirty then clean yourself in the morning? But perhaps my habits are atypical?
Turning to the fiber "evidence". The paint tote was normally kept upstairs. LHP said that she took it downstairs on the 22nd, the day before the Ramsey's party.
"Patsy started taking a painting class, and JonBenet drew a lot with crayons and MARKERS. People and flowers. They had a big easel, but most of the time JonBenet painted on a card table in the butler's kitchen. Patsy had her paints and brushes in a white paint tote. Sometimes she asked me to take her paints down to the basement. "I don't want to see it." On the day of the Ramseys' Christmas party, I took the paint tote downstairs."
http://www.acandyrose.com/s-linda-hoffmann-pugh.htm
So there is no mystery as to why there are fibers in the paint tote. It's PR's and was often kept on the first floor of the house. PR sometimes wore her red jacket in the house. PR says she never wore the jacket when painting, which would make sense, but she didn't say she never handled the tote when wearing the red jacket.
I wonder if she may have carried it back and forth to her painting class? And if so, might she have worn the jacket on the way to class - taking it off when she began to paint? As far as I can tell the police had never asked her about this.
So, PR's tote has PRs fibers which can be explained as innocent transfer. The tote is taken to the basement on the 22nd, by the housekeeper. On the 25 the killer uses the paintbrush, from the tote, to fashion a "garrotte". Pawing through the tote he gets the red fibers on him, and transfers them to the garrotte, blanket, and tape.
So her statement that she didn't visit the WC that night or the next morning is perfectly consistent with the evidence.