Mob hitman who says he was the man on the grassy knoll and killed JFK to be released - and he still insists he did it A man who claims he assassinated President John F. Kennedy has been moved this week from a high security jail to a less secure one in Illinois in preparation for his release next spring after 36 years behind bars. James Files, 72, says that he was the man on the grassy knoll back on November 22, 1963, and that he fired the bullet into Kennedy's head that ultimately killed him. Now, the CIA and...