15 Most Infamous Criminal Cases in U.S. History

D.B. Cooper’s Mysterious Hijacking

In 1971, a man calling himself Dan Cooper hijacked a plane, secured a ransom, and then parachuted into the night—never to be seen again. Despite decades of investigation and conspiracy theories, nobody knows who he was or what happened to him. The legend of "D.B. Cooper" lives on as one of America’s biggest unsolved mysteries.