1920sbased on novel or bookbased on true storycatholic guiltcatholicismcourtroomdeath of sisterdiabetesfbigenocideGreedguiltgullibilityhusband wife relationshipKillers of the Flower Moonmale protagonistmanipulationmetamurdernative americanoil industryoklahomaosage indianperiod dramapoisoningracismrevisionist westernseries of murderstrue crimeuncle nephew relationshipwar veteranwestern