It is certainly a fascinating subject and would make an outstanding movie like,"Ride With the Devil." Most people do not know that the war did not end in that part of Texas for quite some time. You had John Wesley Hardin and the whole unreconstructed crew ridding around fanning the flames. My family was in the area at the time. Sure wish I had some of their stories.
Check out the book,"Murder at the Corners" by GB Ray.