No confusion here (at least on the sweater
Check out the pic of the sweater Patsy wore to the Whites. It is red and black over a red turtleneck.
Anything in the basement is subject to transferrence because Patsy and John both interacted with JonBenet carrying her upstairs, putting her to bed, etc. Even if the Ramseys are guilty, fiber evidence would be of little if any use in a conviction.
What we need to look at is what should NOT be there if the Ramseys are guilty (foreign dna, HiTec boot print, palm print, etc.)
Also, another interesting thing that just came out on an A&E program - they found fibers from the rope JonBenet was bound with in her bed. Doubt the parents would need to tie their daughter up to get her out of bed.