Reddit reviews History Decoded: The 10 Greatest Conspiracies of All Time

Actually, I think it's one of the “removable fascimile documents” from this book: History Decoded: The 10 Greatest Conspiracies of All Time

/u/MudrakM

Evidence? Compare:

• This exhibit
  
• Or this one
  
• The card, other side
  
  They all seem to have the same “Exhibit/Subject” stamp
  
  edit even better: here in page 79, in a discussion of the Thule Society, it tells you to look at Exhibit 5B.

Proven? No.

The conspiracy is that it's the most successful skyjacking in world history. People believe it had to be an inside job since there was no evidence or trail to follow.

Brad Meltzer thinks he found DB cooper, an ex-military paratrooper who worked for Northwest during the skyjacking. For some reason, the police investigated the man and dismissed him as a suspect. The mans entire family believes he's DB Cooper, and the Brad Meltzer investigation revealed the house he lived in for some 30 years found trap doors in the attic that hide store rooms.

You should check out the episode, or buy the book HISTORY DECODED - THE 10 GREATEST CONSPIRACIES OF ALL TIME written by Brad Meltzer. It's pretty cool, he presents the stories and evidence in clear terms, and the book even has reproduction evidence such as letters, plane tickets, etc. He leaves you to come to your own conclusion, and covers DB Cooper, the Georgia Guidestone, John Wilks Booth's supposed full life after the Lincoln Assassination, the Kennedy Assassination, UFOs at Area 51, and more.

Here's the link to the book, I highly recommend it.