MINOT, N.D.—A North Dakota woman has been charged with murder in the stabbing death of her roommate more than a decade ago, with authorities citing shifting statements from the woman and her parents as they pursued a cold-case investigation. Nichole Erin Rice, 34, had a court appearance Thursday in Ward County in the death of 18-year-old Anita Knutson, whose body was found in their apartment on June 4, 2007. Rice was arrested Wednesday at the Minot Air Force Base where she worked as a civilian, Minot Police Chief John Klug said. Rice was always a person of interest, but until recently there had not been enough evidence to arrest her, Klug said. Besides the work of his investigators, Klug credited help from “Cold Justice,” a television series that sends its detectives to work alongside local law enforcement on unsolved homicide cases. According to the affidavit, investigators had been told that …