OGALLALA, Neb. (AP) – A Colorado man accused of firing at law enforcement officers during a chase in western Nebraska has pleaded not guilty to attempted first-degree murder and attempt first-degree assault on an officer. KNOP-TV in North Platte says Mark Phillips of Louisville, Colo., pleaded not guilty on Tuesday in Keith County court in Ogallala. Phillips remains in in the county jail on $1 million bond. Phillips is accused of firing at two officers in rural Keith County after fleeing a traffic stop in December. The officers fired back and wounded Phillips.