Did the Rockefeller Family Hire a Private Investigator?

Moklyn: The specifics of the story are pretty new to me, Matt. Moklyn doesn't come back with proof of this, but is saying this is what I heard. There's a guy named Paul Tuhey who wrote a book called Rocky Goes West. And he says there was an entirely different distinct search. He says the Rockefeller family hired a private investigator. This private investigator, according to Rocky Goes West, came back to New York with some skulls that were supposedly from white men who had been murdered by the tribe.