I believe I mentioned fibers to you earlier today.
First, a disclaimer. The most a witness can say about fibers are that they are similar and could (not *did* as there is no DNA, for instance) come from the same source. Then the witnesses describe the examination done on the fibers and how they are similar, if they are. This includes microscopic evaluations and the like.
Also, the source of some of the fibers has not been determined. The one fiber witness stated the fibers (orange) were like those found in a blanket.
What was found: Westerfield was in the midst of massive laundering when the police came into his home. In all the laundry (washer, dryer and clothes on top of the machines) were found long orange fibers. These fibers were also found in his bed upstairs. Also on a towel in the MH and in his SUV. On Danielle: Tangled within a tangle of her hair on her necklace was found an orange fiber similar in every way to these orange fibers.
Also in his laundry and MH and on the sheet that wrapped her body (wrapped to transport her and capture any trace evidence as it falls off) and one within her hair were found blue/gray fibers. All similar to each other and also source unknown.
In his MH were fibers found to be similar to the carpet in her bedroom.
Also, in addition to the hair in the sink trap with root, there were other of her hairs found in various places. No root attached so the nuclear DNA test was not possible, but MIT DNA was done which determines the hair belonged to Brenda or her offspring. Brenda was eliminated because she color treats her hair, and the brothers eliminated due to length. Danielle's hair was in the lint ball found in his garage garbage. Also on his bedding upstairs, I believe. Other of her hair in the MH.
In the RV ? That really makes the likelihood that they came from a play time visit much more unlikely.