ALBUQUERQUE, N.M. (AP) — The man accused of gunning down a tribal police officer in a remote corner of the nation's largest American Indian reservation has pleaded not guilty to several charges including murder. Kirby Cleveland entered the pleas during his arraignment Thursday in federal court in Albuquerque. He'll remain in custody pending trial. The murder and weapons charges against Cleveland stem from the killing of Navajo Nation Officer Houston James Largo, who was shot March 11 on a dark road in western New Mexico. Cleveland also is accused of escaping from a halfway house in February. At the time of the shooting, Cleveland was on probation for forcing his way into a home on the Navajo Nation in 2012 armed with a baseball bat and assaulting a woman. He served two years in prison in that case.