Deputy Marshal Ed Garry (Jon Hall) is pursuing two bank robbers in Wyoming when he comes across a wounded man.  Harley Masters (Wheaton Chambers) has been shot in the gut but his main concern is holding onto his hat.  Ed takes Harley into town.  They go into the local saloon, where Harley reveals a map hidden in his hat.  He slips the map to Ed before an unseen gunman shoots him a second time.  This time, Harley does not survive.

With the current sheriff “laid up,” Ed decides to stay in town and not only catch the bank robbers but also solve Harley’s murder.  Ed soon finds himself in the middle of a conflict between two rival women (Frances Langford and Julie Bishop) who own ranches and stand to make a lot of money when the railroad comes through.

Deputy Marshal is one of the B-westerns that was produced by Robert Lippert and directed by William Berke in the 40s and 50s.  This one is a step above the usual Lippert production because it combines a murder mystery with the standard western action and there are enough suspects to keep the story interesting.  Jon Hall was best-known for appearing in exotic adventure films, often playing islanders.  His career was in decline when he starred in Deputy Marshal but he makes for a surprisingly believable western hero.  It helps that Hall was older than the typical B-western hero.  His weathered looks make him convincing as an experienced lawman who understood the ways of the west.

Frances Langford, who plays the nicer of the two ranchers, was married to Jon Hall when she appeared in this film.  She gets to sing two songs because this is a Lippert production and Robert Lippert believed that every western should open with a horse chase and should feature at least one song.

While it obviously never won any awards for originality, Deputy Marshal is a better-than-average B-western with an interesting mystery story and a convincing hero.