From the original statements of the stews..When you read these 302's you will notice things are not in order..

Florence states the plane landed and Tina went out and got the money. she returned and gave Cooper the money and then the passengers s tarted to deplane.

She doesn't mention the chutes coming onto the plane. she asked Cooper if they could leave. he said "sure, go ahead". Cooper was putting the back chute on during that conversation.

Florence states that when she went to the cockpit with the notes(2) and sat down taking notes for a few minutes. Tina called from the phone saying the hijacker wanted the note he had written and the note Flo had written back to him.

Tina, states Cooper wanted the stairs to the exit available immediately so Tina could obtain the items requested.he was very insistent that every condition be met. as soon as the stairs were attached she exited the plane and retrieved a bag from an unknown man who got out of a car. she gave Cooper the money and he allowed the passengers to deplane.

Tina, states after the passengers were gone she went back out and picked up one back chute, stating she could only take one. Cooper then told her to lower the shades. nothing about the second back chute. she then goes back out and gets both front chutes. she then states all the hostesses and male members were still on the plane. she then asks him where they are going. she used a pay sheet and wrote in pencil "going to Mexico City----or any place in Mexico---nonstop---gear down---flaps down--don't go over 10,000 feet altitude---all cabin lights out---do not again land in the states for fuel or any other reason---no one behind the first class section"

Tina then states after arguing about the stairs up or down, and the fuel taking too long and no knapsack did he request all the notes, including the one's Flo wrote and Tina be returned.

Tina, states after taking off she noticed him being occupied with the open chute and cutting cord from the chute.

Alice, states the hijacker wanted Tina to go out and get the items requested when they land in Seattle. she states that the hijacker told Tina the stewardesses are to remain on board. she noticed an unpacked parachute and asked Cooper if he opened it, he replied "yes" Alice asked Cooper if they could leave and he replied "whatever you girls would like" so, Alice and Flo left the plane.

Does anyone know what ever became of the envelopes containing the letters which were sent after the hijacking? You are not allowed to view links. Register or Login

I've been doing some reading on DNA extraction techniques, if the original envelopes still exist, it shouldn't be difficult to pull DNA from the envelope flap and stamp. It's not overly expensive, and it's not even a drop in the bucket given what's already been spent on the case.

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While the FBI didn't take all of these letters seriously, there were at least a couple that they kept close to the vest, implying that they did take those seriously.

Why not try to pull DNA from all of the stamps/envelopes and start comparing them to each other?
 Do any match? Are they all sent by the same person? Start building a family tree and figure out who sent them. Given the techniques available, this is doable, today. The clock is ticking on this case, Tina is still alive and could potentially ID Cooper based on who sent those letters, but if they don't take action on this in the next few years, we may never know.

It's frustrating that they potentially have the evidence necessary to identify Cooper, but refuse to do so.

Oct 31, 1970 - The Virginian 'Gun Quest' - Daniel 'Boss' Cooper.