It wasn’t just Mollie’s family that was being methodically killed on Oklahoma’s Osage Nation Reservation in the early 1920s. More than two dozen members of the Osage tribe had been shot, stabbed, beaten and bombed in one of the bloodiest crime sprees in American history. Investigators who probed the case too deeply also had a propensity for turning up dead. One attorney with information on the case was thrown off a speeding train, while the body of Barney McBride, a wealthy white oilman who agreed to go to Washington, D.C., to ask federal authorities to investigate the murders, was found stripped, beaten and stabbed more than 20 times in a Maryland culvert in what the Washington Post called “the most brutal in crime annals in the District.”
https://www.cbsnews.com/videos/buried-secrets-the-osage-murders/ 2017 Buried secrets: The Osage murders: APRIL 30, 2017, 10:06 AM| In the early 20th century, an oil rush in the Osage Nation, located in a corner of Oklahoma, produced a torrent of oil revenues for the Native American tribe, making them the richest people per capita in the world - "the Kuwaitis of the 1920s," one writer observed. But their wealth invited greed, exploitation and murder on the part of white "guardians" who came to control the Osage's money, and would lead to the first major investigation by the FBI. David Grann, author of the bestseller "The Lost City of Z," talks with correspondent Lee Cowan about the Osage Reign of Terror, as recounted in his new book, "Killers of the Flower Moon."