The Baron of Arizona

The Baron of Arizona is a 1950 film by Samuel Fuller and starring Vincent Price.

The notorious attempt by swindler James Reavis to claim the entire territory of Arizona as his own before it was granted statehood in 1912 is recounted years later by John Griff, who works for the Department of the Interior.In 1872, Reavis went to great lengths to forge documents in Spain and create the illusion that he had a legal right to claim all of Arizona his own. He began by seeking out Pepito Alvarez to inquire about Sofia, an infant abandoned by Reavis many years before. ........

Source: Wikipedia