In July 1982, neighbors in a quiet Portland, Oregon neighborhood discovered that 86-year-old Lena Malmberg had not been heard from since the previous evening. On July 10, her daughter’s worry led a neighbor to check the woman’s home on Southeast 20th Avenue, where Lena sometimes used a walker. The neighbor found the front door damaged and a front window broken, then called police.

Officers entered and found Lena deceased in her bedroom. An autopsy determined she died from traumatic asphyxiation. Investigators reported she was last heard from at about 7:00 p.m. the night before the discovery and that she had no known enemies or disputes. Despite a thorough investigation, no suspects were identified and no arrests were made.

Who in the neighborhood or who might have been seen near Southeast 20th Avenue that night can help explain what happened to Lena Malmberg?