William Colby is a retired lawman turned rancher. He became a Texas Ranger at the age of 17 and had a good record. Twenty years later, he retired from the rangers and took up a United States Marshal's badge. He traveled Oklahoma, Kansas, Nebraska, and Colorado catching outlaws. He turned in his badge at the age of 50 years - yes, a very old man for his line of work. Outlaws knew of his fast gun and no nonsense manner. He was a lawman outlaws feared.