Generations ago, the American Indian Osage tribe was forced to move. Not for the first time, white settlers pushed them off their land in the 1800s. They ended up in a rocky, infertile area in northeast Oklahoma in hopes that settlers would finally leave them alone.
As it turned out, the land they had chosen was rich in oil, and in the early 20th century members of the tribe became spectacularly wealthy. They bought cars and built mansions; they made so much oil money that the government began appointing white guardians to "help" them spend it.
And then Osage members started turning up dead.
In his new book, "Killers of the Flower Moon", David Grann describes how white people in the area conspired to kill Osage members in order steal their oil wealth, which could only be passed on through inheritance. "This was a culture of complicity," he says, "and it was allowed to go on for so long because so many people were part of the plot. You had lawmen, you had prosecutors, you had the reporters who wouldn't cover it, you had oilmen who wouldn't speak out, you had morticians who would cover up the murders when they buried the body, you had doctors who helped give poison to people."
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On how the conspiracy worked
What makes these crimes so sinister is that it involved marrying into families. It involved a level of calculation and a level of betraying the very people you pretended to love. And the way these murders would take place is that people would marry into the families and then begin to kill each member of the family. ... That's exactly what happened to [Osage woman Mollie Burkhart]. She had married a white man, and his uncle was the most powerful settler in the area. He was known as the King of the Osage Hills ... and he had orchestrated a very sinister plot played out over years where he directed his nephew, who had married Mollie Burkhart, to marry her so that he could then begin to kill the family members one by one and siphon off all the wealth.
On how Mollie Burkhart's family was killed
One day in 1921, her older sister disappeared and Mollie looked everywhere for her and couldn't find her. And about a week later, her body was found essentially in a ravine, decomposed. She'd been shot in the back of the head.
Then just a few weeks later, Mollie's mother began to grow increasingly sick. She seemed to be almost disappearing, withering in front of her. And within two months she, too, had died. And evidence later suggested that she had been secretly poisoned.
Not long after that, Mollie was sleeping in her bed in her house with her white husband; they had a couple children. And she heard a loud explosion. She got up in panic and terror. ... She had another sister who lived not far away, and in the area where her sister's house was she could see almost this orange fire ball rising into the sky. It almost looked as if the sun had burst into the night. And her sister's house had been blown up killing that sister as well as her sister's husband and a servant who lived in that house.
On how far the conspirators went to cover up their crimes
Almost anyone who tried to investigate the killings — or at least stop them in the area — they, too, were killed. One attorney tried to gather evidence and one day he was thrown off a speeding train and all the evidence that he had gathered had disappeared. Another time, an oilman had traveled to Washington, D.C., to try to get help. ... He checked into a boarding house in Washington, D.C. ... He was then found the next day stripped naked. He had been stabbed more than 20 times; his head had been beaten in. The Washington Post at the time said what everyone at that point knew, which was there was a conspiracy to kill rich Indians.
On how authorities reacted to the deaths
It's really important to understand back then that there was so much lawlessness. That was one of the things that shocked me when I began researching the story, that even in the 1920s much of America remained a country that was not fully rooted in its laws. Its legal institutions were very fragile; there was enormous corruption, particularly in this era and in this area. And the conspirators were able to pay off lawmen, they were able to pay off prosecutors. There was so much prejudice that these crimes were neglected.
Mollie Burkhart beseeched the authorities to try to investigate, to get help, but because of prejudice they often ignored the crimes. And she issued money for a reward, she hired private investigators, but the crimes for years remained unsolved, and the body count continued to increase. By 1924 there were at least 24 murders alone. ...
Finally, the Osage, in desperation, they issued a resolution, a tribal resolution, beseeching the federal authorities to help. And finally a then-very obscure branch of the Justice Department intervened. It was known as the Bureau of Investigation and it was what ... would later be renamed the FBI.
On the FBI's investigation
J. Edgar Hoover ... was the new director, and it became one of the FBI's first major homicide cases that it ever dealt with. ... The bureau initially badly bungled the case. ... [Hoover] turned the case over to a frontier lawman at the time who finally put together an undercover team that included ... probably the only American Indian agent in the bureau at the time. They went undercover. ... They were able, through some dogged investigation and at great danger, to eventually capture some of the ringleaders. And those ringleaders included not only Mollie Burkhart's husband, it also included [his] uncle, a man who was seen as this great protector of the community.
On what the FBI missed in their investigation
The bureau was so anxious to wrap up the case that they ignored many, many other unsolved crimes and many, many other killers. ... When you begin to look at the documents and you begin to collect the evidence from the Osage, it becomes abundantly apparent. ...
I pulled some of the guardian papers and there was this little booklet that came out. It had a little fabric cover. All it was was essentially identifying the name of a guardian and which Osage they were in charge of. And when I opened up the book, I could see the name of the guardian and when I began to look at the names of the Osage under them I could see written next to many of them simply the word "Dead. Dead. Dead." It was almost like a ledger; it was like this forensic, bureaucratic accounting.
But when you're looking at it, you're beginning to realize you're looking at hints of a systematic murder campaign, because there's no way all these people died in a span of just a couple years. It defied any natural death rate. The Osage were wealthy, they had good doctors. ... And then when you begin to look into each of those individual cases, you start to find trails of evidence suggesting poisonings, a murder. You start to try to trace the money ... and where the wealth went. And what you begin to discover is something even more horrifying than the bureau ever exposed.
Radio producer Taylor Haney, radio editor Shannon Rhoades and digital producer Nicole Cohen contributed to this story.