Director Martin Scorsese, actors Leonardo DiCaprio and Robert De Niro share how they found the emotional approach to their epic film 'Killers of the Flower Moon'. Based on the book by David Grann, the film is about the Osage murders and the founding of the FBI in the 1920s. The story follows a Texas Ranger who is sent to Oklahoma to investigate the murders of the Osage Indian Nation, who got rich from oil on their land.

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