It’s based on another Elmore Leonard novel. The character of Raylan Givens first appeared in Leonard’s novels “Pronto” and “Riding the Rap.” He later appeared in the short story “Fire in the Hole,” which served as the basis for “Justified.” The revival is based on yet another Leonard work: the 1980 crime novel “City Primeval: High Noon in Detroit,” though the book does not feature Raylan. The story, which is set in Detroit and follows dangerous criminal Clement Mansell, aka The Oklahoma Wildman (portrayed by Boyd Holbrook in the show), is being updated to include the character.
It's an Elmore Leonard based storyline, that'll do me.
