Rio Grande Patrol is a 1950 Western film directed by Lesley Selander and starring Tim Holt and Tom Tyler.

[1][2] In the Old West, Laredo saloon owner, Fowler, is smuggling guns across the U.S. - Mexican border with the assistance of outlaw, Bragg Orcutt, by hiding them inside the costume trunks of his dance-hall girls.

Border agents Kansas Jones, and his pal, Chito Rafferty, accompany Captain Trevino to the train station to investigate.

Fowler heads to Bragg's hideout and tells him Trevino is not dead and he can't move the guns because he is under suspicion.

The pair hire Bragg's henchman, Chet Yance, to kill the border agents and instruct him to be at Fowler's saloon that evening.

Sherry tells Fowler she intends to marry Trevino and is leaving his employment as soon as they arrive in Monterrey.

Kansas' horse, Lightning, escapes and heads back to town putting Chito and a recovered Trevino on notice.