So the DNA found both in the underwear and waste band of the long johns came from the same factory and was handled by the same person? If so, he must be a POI. They have clearly stated the DNA in question does not belong to a current POI or the family.
Yes, I have read a couple of books about this case and have never seen anything definitive about the underwear.
There have been multiple theories over the years, including in books by various investigators over the years.
Can you please link a source connecting the DNA found on her underwear being linked to the factory man and what LE has said about that in the current investigation? I'm surprised they would reveal a detail like that since it is an active investigation.
Whatever was used to wipe down JonBenet has never been identified and likely never will be. This raises all kinds of questions about transfer.
I don't think it matters what they do. It's my opinion that this case will never be solved.