John Dillinger
He was killed in an alleyway in 1934 after the FBI put out a $100,000 bounty on his head. The conspiracy claims that it was not actually Dillinger since the body had brown eyes while Dillinger had "famous" stormy grey eyes. In 1963, the Indianapolis Star received a letter from someone claiming to be Dillinger, which led many people to believe that he had survived. It's not really clear what the truth is.