Gunmen from Laredo

After Ben Keefer kills Gil Reardon's wife, Reardon seeks revenge. To get to Keefer he has to outdraw one of Keefer's henchmen. But Keefer makes it look like murder amd he is convicted and sent to prison. He escapes, but returning he is captured by the Marshal. The Marshal knows Keefer is a crook but has been unable to convict him. So he lets Reardon escape and Reardon goes off alone to face Keefer and his two brothers. (imdb)