Joanne Carol Bettger Parkin was 31 when she was murdered on November 7, 1973, in Acampo, California. She and her husband Walter Parkin and their children Lisa and Robert were killed during a violent crime spree that began in Arizona and reached Victor, California, where the family lived. Reports say the attack on the Parkin home occurred on November 3, 1973, and resulted in the deaths of the entire family, including Joanne.

Investigators identified Douglas Gretzler and Willie Steelman as the primary suspects; the two were arrested soon after the killings and charged with multiple counts of first-degree murder. At trial, both men were convicted and sentenced to death. The case drew intense media attention because of the brutality and apparent premeditation of the killings.

Does anyone have memories of the Parkin family or information about the events leading up to November 1973 that could add context to what happened?