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Kenny Still Smoking stands over the tombstone of his 7-year-old daughter, Monica, who disappeared from school in 1979 and was found frozen on a mountain. (AP Photo/David Goldman)

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Missing in Indian Country part II: Lawmakers seek answers for why Native American women vanish

Matthew Lone Bear spent nine months looking for his older sister, Olivia — using drones and four-wheelers, fending off snakes and crisscrossing nearly a million acres, often on foot. The 32-year-old mother of five had last been seen driving a Chevy Silverado on Oct. 25, 2017, in downtown New Town, on the oil-rich terrain of North Dakota’s Fort Berthold Reservation.