Big Calibre.

Intent on avenging his father's murder, Roy Neal and his sidekick Rusty find themselves in the border town of Gladstone where Neal is mistakenly arrested for the robbery of a mail truck. After escaping, Neal joins up with pretty June Bowers whose father has apparently also been murdered. Neal, suspecting two of the town's leading businessmen of being the murderers, tries to flush them out before the sheriff can lock him up again.