Killers of the Flower Moon (book by David Grann, as well as the recent film) recounts the true story of how a white businessman and self-proclaimed “true friend” of the Osage Nation orchestrated the …Killers of the Flower Moon (book by David Grann, as well as the recent film) recounts the true story of how a white businessman and self-proclaimed “true friend” of the Osage Nation orchestrated the …