How much detail has been released about passengers, crew members, and airline/airport personnel? Is every one of the passengers accounted for? Pictures? Names verified, addresses verified? Some investigators assumed he had help, maybe even from an employee. However, if they never found DB Cooper, then they don't know how to find similarities between him and others (related, worked together, served together, lived near each other).
I'm not trying to start a conspiracy discussion, but it is standard practice to vet out all witnesses and relatives. Am I safe in assuming it was done? The descriptions were all over the place, the composites were all over the place. Maybe he didn't act alone. For the record, I definitely do not think Flo, Bill Mitchell, or Ratazack were involved.
And ... what of the interviews that have been made public so far? Is that everything? No real Q&A in any of the interviews made public.There has to be more - ?? 
Where does a "green" paper bag come from? Greeny's Hardware? Green's Donuts? The Green Room at Boeing? 
That's occurred to me, too, Georger. The transcripts feel incomplete. For example, I wonder if the Simmons couple actually were interviewed. It seems weird for them to go public with all this detail if they initially told the FBI they never saw the guy, evading interview. I'm Canadian, and if two of your men in black showed up at my door tomorrow, I'd tell them anything they wanted to know about anything (I'm even scared of your Customs dudes, and I'd declare chewing gum). Who'd go on TV and say they saw stuff they told the feds they never saw? As I believe 377 has mentioned before, the FBI could still be holding evidence back so as to confirm a future suspect.
The legal status for heirs is also something I've wondered about - mainly because it would provide a reason the person who pulled off the crime of the century didn't leave a bragging note to be opened after his death proving who he was. Alive or dead today (and the odds are the latter, even if he survived the jump - how many surviving suspects are there? Like 2 or 3?) he wouldn't confess ever if his kids would lose out for it. This is the only reason I can think of for him not ensuring his name in the history books after his death - apart from either lack of pride in the "achievement" and/or private amusement over permanent anonymity.
The small green paper bag seen by Tina (which I still maintain was likely in his pocket and separate from the light-colored "sack" Mitchell and House mention in great detail) is, of course, totally up for spec, though when I think of really small bags, I think either pharmacy, hardware store, or candy store. The first two are more likely to me, but honestly there's no solid proof he didn't just have a taste for Tootsie Rolls.
