Appaloosa (2009)

Set in 1882 in the Old West territory of New Mexico, "Appaloosa" revolves around city marshal Virgil Cole and his deputy and partner Everett Hitch, who have made their reputation as peace-keepers in the lawless towns springing up in the untamed land. When a ruthless, powerful rancher named Randall Bragg and his band of outlaws run roughshod over the town, Cole and Hitch are hired to bring the murderer to justice

Official website: http://www.welcometoappaloosa.com/