Officers arrested Mott after a struggle during which he admitted to killing his mother and expressed satisfaction with his actions. A 42-year-old man accused of killing his mother and stabbing a police officer entered a not guilty plea in court Tuesday. Christopher Mott faces charges of first-degree murder, first-degree burglary, and first-degree assault following the Aug. 3 attack in Renton. Police say Mott stabbed an officer in the eye and face, before being taken into custody. Injured officer recovering at homeRenton police confirmed that the officer stabbed in the face is currently recovering at home.