OWENSBORO, Ky. - Bob Howe points to an overgrown, muddy patch of land in a cemetery in Owensboro, gesturing to where the grave of the last man publicly executed in the United States may be. "I think it was over there," said Howe, an 81-year-old lifelong Owensboro resident and retired county coroner. "I used to pass it on the way to school. That's what I was told. It was over there somewhere." The grave is anonymous and unmarked, like other places associated with Rainey Bethea's hanging Aug. 14, 1936. On the 75th anniversary of the execution, it is something some...