"White Indian"

In "White Indian" Hardie tries to identify the parents of a white boy who was raised by Indians for 15 years.

According to the synopsis here: https://www.imdb.com/title/tt0717289/

The boy was raised by Choctaws, who were moved from the Southeast to the Indian Territory (now Oklahoma) in the 1830s.

There is evidence that the boy might be Tommy McCrea who was 4 years old when his grandmother sent him from St. Louis to his parents. If I heard it correctly, Tommy was on the train to Dodge City, and then sent by stage coach to his parents, but the stage was robbed and the passengers killed. Tommy's body wasn't found.

Dodge City was founded in 1872 and the Atchison, Topeka and Santa Fe Railway reached it in September, 1872. So Tommy could have reached Dodge City by train and left by stagecoach any time after September 1872 in real life.

So that means that "White Indian" could have happened any time after September 1887, if it happened in real history and not the Wild West.