1. Conspicuously absent from the "citizensleuths' report is any evidence "Dan Cooper" bought the tie new. They seem to just presume all particles and other contaminants on the tie came from his activities.
Maybe he bought the tie used at a thrift store, where belongings often go after people move, retire, or die. Or at a yard sale, or ???
(And if the tie was linked to someone involved in the SST program that was canceled in 1971, might there have been a lot of employees retiring, moving, etc, around that time)? Persons associated with the military also may move around a lot.
Or perhaps the tie had belonged to a male relative or in-law, or to a roommate or ex-roommate, or an engineering professor or student, or ???
Lot of assumptions in report, but......
2. Also lacking (in this report) is any real evidence of when that particular tie might have been sold new.
It says Penney stopped selling that model tie a year to 18 months earlier -- but when was that model first sold, and for how long was it being sold?
Is there any evidence that might help date when the tie was made and sold new, such as the dye, thread, weaving or assembly method, plant where it was manufactured or the batch, or ....)?
3. Were there any stains from food or drink?