In 2011, Assistant U.S. Attorney Rick Volk was appointed to work specifically with Fort Berthold. Between 2009 and 2011, federal case filings on North Dakota reservations rose 70 percent. When I asked Tim Purdon, North Dakota's U.S. attorney, if the numbers had anything to do with a rise in crime, he first insisted they did not. He believed there was a growing sense among Native American victims that the crimes they reported would be prosecuted, and this encouraged more women to come forward. But beginning last summer, Purdon noticed a peculiar pattern emerging from Fort Berthold. Many of his filings—a surprising number of them—involved non-Indian perpetrators. "We had five or six in a month," he told me. "Why was this? We realized it's non-enrolled folks moving to the oil patch."

http://www.theatlantic.com/national/...ything/273391/