John Anderson, 52, pleaded not guilty in Pasadena Superior Court to a probation violation related to a 2005 conviction for prowling, peeking, and trespassing in Arcadia. He allegedly shot a veteran Monrovia police sergeant too.
The murder conviction for Daniel Arzaga, who killed Timothy Koppos in his Alhambra home, and wounded Colleen Koppos and her grandmother Bertha Tate on April 22, 2001, was upheld.