A retired Texas Ranger recalls a career that took him from shootouts in South Texas to film sets in Hollywood. When his picture appeared on the cover of Texas Monthly, Joaquin Jackson became the icon of the modern Texas Rangers. Nick Nolte modeled his character in the movie Extreme Prejudice on him. Jackson even had a speaking part of his own in The Good Old Boys with Tommy Lee Jones. But the role that Jackson has always played the best is that...