Oathkeeper

"Until recent times, Calumet County had never been known as a place of killing and violence..."
A peaceful valley in the mountains of Colorado becomes a battleground pitting the federal government against a rural sheriff's department. Beleaguered Sheriff Bear Ellison finds himself outnumbered, over-matched, and increasingly isolated as he is forced to decide between risking his life protecting a local hero, or reneging on his oath and handing him over to federal prosecutors.