The Bloodhound(1925)

"Moose" Rambo is killed by an unknown assailant during a barroom brawl, and Belleau is wrongfully accused of the crime. Sergeant McKenna of the Northwest Mounted Police is detailed to go after him, and Constable Fitzgerald, who saw Belleau on the night of the murder, is struck by the resemblance between Belleau and McKenna. Believing them to be the same man, Fitzgerald confides his suspicions to the chief and is detailed to pursue McKenna.