Ken Rex McElroy was a Grade-A asshole, and in a town with a population of less than 500 people, that particular kind of assholery will only last so long.  The biggest mystery surrounding this murder case is why didn't the murder occur sooner.  Pull up a seat and listen to the story that influenced the film "Road House," as Joel and Cash explore their morality (Spoiler Alert... It's not a very deep exploration).