Harriet A. Isaac, 64, was found dead on October 24, 1986, inside her second-floor condominium at 4999 Kahala Avenue in the Kahala Beach area of Honolulu. Neighbors noticed her morning newspaper still at the door and, after repeated knocks went unanswered, building security opened the unit. Isaac was discovered in a hallway with multiple stab wounds inflicted by a knife and her body left beneath a blanket.

Investigators reported no obvious sign of forced entry and no evidence the apartment had been ransacked, yet detectives treated the death as a homicide. Police notified her daughter, who was in Hawaiʻi at the time. Reporting noted Isaac had been estranged from her husband, who no longer lived in Hawaiʻi, and that the couple had moved from California to Honolulu in the early 1970s. No suspect has been publicly identified and the case remains listed among Honolulu’s cold cases.

Did anyone who lived in Kahala Beach in 1986 or knew Harriet notice anything that might help investigators?