The Lone Ranger (1949)

Season 5: Episode 8

The Lone Ranger and Tonto find an injured man who is building a school house on his own. They learn from him that the school is the project of an Indian girl who wanted to have a school for Indians. She was given $10,000 to help build the school but two men, one of whom is an Indian who worked for her, killed her and took the gold.