The Witching Hour (film 1921)

Clay Whipple is convicted of murdering the governor following an incident involving a cat's eye pin. Whipple is sentenced to death, but a mentalist named Psychic Jack believes he is innocent since Whipple had been hypnotized at the time of the murder. The psychic persuades the judge to grant the condemned man a retrial, and he sets out to uncover the identity of the real killer, during which time he manages to prevent a second murder from occurring.