Former roommate arrested 15 years after college student Anita Knutson found stabbed to death

Police in North Dakota said Wednesday they have arrested a woman who was the former roommate of an 18-year-old colleges student who was killed nearly 15 years ago. Anita Knutson, a student at Minot State University, was found stabbed to death in her apartment on June 4, 2007.

The Minot Police Department said that Nichole Rice, 34, was in custody. Rice was at work on Minot Air Force Base as a civilian when she was arrested without incident, Police Chief John Klug said at Wednesday evening news conference.

"It was a relief," Klug said of the arrest.  "It was good to know that finally the one case that we've had hanging out there that we just could not get to a solution was finally over."