While the search for Seattle's "Green River Killer" was under way, police were distracted by a series of unsolved murders at Portland, Oregon, 170 miles to the south. No link was ever demonstrated to the Portland murderer who claimed four victims - all black women, all known prostitutes - between March 1983 and April 1984, but like his more prolific soul-mate in Seattle, Portland's maniac remains at large. The first to die, on March 23, 1983, was 24-year-old Essie Jackson, strangled to death by an unknown assailant, her nude body dumped on an embankment near Overlook Park. Four months later, on July 9, 20-year-old Tonja Harry was fished out of the Columbia River Slough, the cause of death recorded as asphyxiation. Angela Anderson, strangled to death at 16, was found three days before Christmas, in a vacant house. Nineteen-year-old Vickie Williams, stabbed repeatedly, was found in shrubbery near a Portland shopping mall, on April 23, 1984. At this writing, the series of murders in Portland appears to have ended, as suddenly and mysteriously as it began. Without a solid lead, authorities can only speculate about the killer's true identity, his motives, and the circumstances that compelled him to "retire."