Ambush at Dark Canyon (2012)

In the 19th century, an African-American man is unjustly incarcerated in the Yuma Territorial Prison. He becomes the sole survivor of an ambush, and a reporter interviews him about the incident. The story is entirely told in flashback, revealing the blood-stained journey of the prisoner, including his escape attempt, dig a grave, and pursuit by fugitives. The plot takes a surprising twist as the reporter uncovers the truth behind the ambush.