I'm caught up, here are a few of my thoughts
Although I'm not sure if it is CONFIRMED that her clothes were in her bookbag, I can add that my fifth grader often has friends arrange to come home Fridays with her on the bus to sleep over, and the girls have no problem fitting pjs, next day clothes, and toiletries in their bookbags along with their school stuff.
The receipt being found near-ish to the body? I don't see the perp taking the time to dismember, drop the bookbag with her clothes in a different neighborhood, then tossing an incriminating receipt where it could be found and connected. OT but my former neighbor was a close friend, and we would often run daytime errands together, get out nails done together, run to the store and buy stuff for dinner together, and she was a closer smoker and I saw the lengths she would go to to make sure her husband never found her cigarette receipts (lol), tearing them, trashing them immediately, etc.. My point is, people know that receipts tie them to things. That is crime 101. There is always the murdered wife and the husband on tape buying duct tape, Trash bags, and a shovel
. IMO this perp is local and buys his trash bags where most locals buy their trash bags and used what he had on hand. It would be great if that receipt busts him, but it would surprise me because although I don't see him as a genius, I don't see him THAT sloppy, either.
Hair: there are 3 females with long hair in my house and a Siberian husky. You should see what my Dyson collects. But still, I rarely see a "clump" of hair unless someone cleaned a brush, and that is usually a mix if old brittle hair and lint (sorry) and looks very different from, say, freshly pulled hair. IMO a "clump" or "tuft" that remained intact while outside with wind and elements would have to be significant, and IMO would mean a salon's trash or a violent crime. Most people have hair in the world, but how many of us have found a "tuft of hair" in a park?