FILE - This undated photo provided by Washington State Department of Corrections, shows Robert Farrell Armstrong. Armstrong, also known as “Dr. Bob,” is accused by Montana authorities of obtaining pure methamphetamine in his home state of Washington to distribute through a network of couriers across Montana. He pleaded guilty to possession of methamphetamine with intent to distribute during an appearance before U.S. District Judge Susan Watters in Billings, Mont. on Wednesday, Jan. 22, 2014. (AP Photo/Washington State Department of Corrections, File)
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