Killers of the Flower Moon, a film by director Martin Scorsese, is inspired by the best-selling book of the same name by writer David Grann and also based on a true story. The year is 1920, in the North American region of Oklahoma and mysterious murders take place in the Osage Indian tribe, a land rich in oil. The case was investigated by the FB, an agency that had just been created at the time.

Murders arising from mysterious circumstances in the 1920s, plaguing members of the Osage tribe, ended up triggering a major investigation involving the powerful J. Edgar Hoover, considered the first director of the FBI. During the investigation, a scheme by cattle rancher William Hale (Robert De Niro) is discovered, who convinced his nephew Ernest Burkhart (Leonardo Di Caprio) to marry Mollie Kile (Lily Gladstone) in order to improve the conditions for claiming the precious lands.

https://www.youtube.com/watch?v=7cx9nCHsemc