Decorah Police have arrested two people on marijuana charges. Police were called to 110 Court Street in Decorah at 11:00 p.m. Wednesday. They discovered the odor of marijuana in the building's hallway. Police arrested 23-year-old Adam Graybill of Decorah and 22-year-old Ashley Ewing of Prior Lake, Minnesota. The two were charged with Possession of a Controlled Substance and with Possession of Drug Paraphernalia.