I think the tie possibly not being Cooper's is valid, but in 1971 would someone be worried about something like that? today, yes, but odds are it was probably Cooper's...much like the Amboy video stirred things up again, it appears the FBI closing the case due to "no credible leads" also has fueled some suspects back up. Galen was on the radio with "new evidence" Jo is sending away with emails, and Bobby is still pushing the short bald guy who worked for NWO for 20 years after the hijacking....
Interesting responses in the documentary toward the suspects by Tom and Billy.
I assume their opinions were influenced by their conversations with the FBI. (I don't mean to say the FBI told them anything, but they could probably get a sense of who the FBI thought was a real suspect and who wasn't).
Duane Weber was rejected because of his appearance
Kenny Christiansen was rejected because he was an employee of NWA.
Sheridan Peterson they just left with an awkward left when asked if he could be Cooper.
And, Marla gave the the opportunity to reject LD because of her far out conspiracy story, but they didn't do it. Fuentes asked if the "crazy" part cancelled out the other part.
And, they rejected Rackstraw pretty definitively.