Byron De La Beckwith
He was acquitted of the crime by a deadlocked all white jury in 1964, and was retried twice more. Beckwith was finally convicted in 1994, based on new evidence that he had boasted about the killing at a Ku Klux Klan rally. He was given a life sentence for murder and died in prison in 2001 of heart problems, while his case was still being appealed.
See also: List of assassins