A Phoenix police officer killed Wednesday was shot with a high-powered rifle, by a gunman who may have fired about a dozen shots, court documents released Thursday morning show. Officer Travis Murphy, 29, was shot and killed after he and another officer responded about 1:30 a.m. to a suspicious person call in the 1900 block of West Fairmount Avenue, south of Indian School Road, according to the documents. The suspected shooter, Danny Martinez, 30, of Tucson, was arrested on suspicion of first-degree murder and ordered held without bond.