In 1916, in the tiny West Texas town of Benjamin, a gunman slips into a courtroom and murders the defendant. In 1912, in Fort Worth's finest hotel, a young man kills an old gentleman in cold blood in the middle of the lobby. The verdict in both of these murderers' trials? Not guilty. The explanation? "This is Texas." Laws passed by politicians in far-off Austin meant little to Westerners living on the Texas frontier. Sagebrush justice relied less...