Most Americans have heard of the case of DB Cooper, who is accused of pulling off the only plane hijacking in the history of the United States that has never been solved. Now, 44 years after the brazen air heist, a Michigan author has put forward a new theory linking the mystery of DB Cooper to an obscure missing person case involving a married father of four who vanished two years before the skyjacking and was never heard from again. Over the years, the facts of the skyjacking history have become the stuff of legends: on November 24, 1971, a...