Originally a nemesis of sheriff Walt Longmire on the TV series Longmire, Jacob Nighthorse (A Martinez) eventually begins to work with the sheriff to restore order to Absaroka County. Nighthorse is a member of the Cheyenne reservation and the wealthy owner of the Four Arrows Casino along with many other urban projects. Although of dubious character with shady dealings, he often shows a strong ethical streak, particularly when it comes to his people. While at the casino and in his office he always dresses in a fancy suit with colorful shirts and his ever-present goatee.

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