The Lone Ranger (1949)

S2E10 Masked Deputy

Tonto and the Lone Ranger are hot on the trail of cattle thieves, but they can't figure out how the rustlers are managing to move such a significant number of cattle without detection. The Lone Ranger theorizes that the culprits might be residing in a nearby town, masquerading as upstanding members of the community, and he resolves to look into it further.