The Fighting Deputy 1937 : Fred Scott, Phoebe Logan, Al St John (Western Films)

Sheriff Dan Bentley (Frank LaRue) and Deputy Tom Bentley (Fred Scott) are after Scar Adams / Jim Denton (Charles King), the brother of Alice Denton (Phoebe Logan).
Tom Bentley plans to marry Alice Denton, but Sheriff Dan Bentley, Tom's father, is wounded and offers Tom the job as sheriff. Alice makes Tom refuse the job, but when Scar kills his father, Tom puts on the badge and takes off after him.