They just take fiber samples from whatever they think is relevant then see if it matches with fibers at the crime-scene.
UKGuy,
Not taking the soiled pj’s found in JB’s bedroom (and to big for her) i.g. bloomies size 12 wasn’t considered relevant either.
They said they matched Patsy's jacket fibers to those found in the knotting of the ligature and on the sticky side of the duct-tape.
2000-08-28: Patsy Ramsey Interview - Atlanta, Georgia - August 28, 2000
3 MR. LEVIN: I think that is
4 probably fair. Based on the state of the
5 art scientific testing, we
believe the fibers
6 from her jacket were found in the paint
7 tray, were found tied into the ligature found
8 on JonBenet's neck, were found on the blanket
9 that she is wrapped in, were found on the
10 duct tape that is found on the mouth, and
11 the question is, can she explain to us how
12 those fibers appeared in those places that
13 are associated with her daughter's death.
14 And I understand you are not going to answer
15 those.
ST deposition 9-21-01 gives a great statement here in regards to PR fibers:
The
19 red fibers, we're talking about the red
20 fibers off the duct tape, right, the ones
21 that Mr. Hoffman asked you about?
22 A. Yes.
23 Q. That were consistent or a likely
24 match with Patsy Ramsey's jacket?
25 A. Yes.
251
1 Q. That was the red and black and
2 gray jacket that she was wearing?
3 A. I've always heard it referred to
4 as a red and black jacket, yes.
5 Q. It's the one in the photograph,
6 though, that was produced where they went
7 back a year afterwards and tried to find what
8 they were wearing, right?
9 A. Yes.
10 Q. Were you aware of the fact that
11 Priscilla White owned an identical jacket,
12 that in fact Patsy Ramsey bought her jacket
13 because she liked Priscilla White's so much?
14 A. Until you told me that right now,
15 no.
16 Q. So I assume that no request, that
17 you're aware of, was ever made for the Whites
18 to give articles of clothing with respect to
19 this investigation?
20 A. They may have been asked to give
21 clothing; I'm unaware of that.
22 Q. There were no black fibers that
23 were found on the duct tape that were said
24 to be consistent with the fibers on Patsy
25 Ramsey's red and black jacket, were there?
252
1 A. It's my understanding that the
2 four fibers were red in color.
Other key evidence connected with the duct tape was trace evidence which had adhered to the surface of the tape. CellMark laboratories, who conducted the testing on the duct tape, found, red, blue, pink, purple and brown cloth fibers, and animal fur probably beaver."
Similarly for JR his fibers matched those found on JonBenet's thighs.
You mean her labia not her thighs don’t you?
The R's can contest the fiber evidence on the basis they are common industrial fibers, etc. Yet the one place they should not be is on JonBenet's person inside a little used wine-cellar.
JR fiber evidence came from a specific item. PR evidence linking her jacket were consistent.