South of the Rio Grande

You shouldn't need a map to know that title puts you smack dab in Mexico, and that's just where Buck Jones finds himself, playing a local police sergeant whose brother killed himself after falling for a land swindle and the charms of sultry, sinister señorita Mona Maris. Can Jones lay down "la ley" and bring Maris and her cohorts to justice? With Philo McCullough, Paul Fix. Standard; Soundtrack: English.