Streets of Laredo (film)

Streets of Laredo is a 1949 western film starring William Holden, Macdonald Carey and William Bendix as three outlaws who rescue a young girl, played by Mona Freeman. When they become separated, two reluctantly become Texas Rangers, while the third continues on a life of crime.

A trio of outlaws, Jim Dawkins Holden, Loren Renning Carey, and Reuben Wahoo Jones Bendix, rob a stage. But when a young lady, Rannie Carter Freeman, is menaced by rich and ruthless Charley Calico Alfonso Bedoya after her father is killed, the robbers come to her rescue. They run him off, then pay old Pop Lint Clem Bevans to watch over her at his ranch.Loren ends up separated from his partners but continues his life of crime. Jim and Wahoo inadvertently aid some Texas Rangers and are sworn in as Rangers themselves. Loren sees an opportunity, steals a herd of cattle the Rangers are guarding, then lets Jim and Wahoo enhance their reputation by being the ones who bring the cattle back. ........

Source: Wikipedia