On November 3, 1973, Marine Captain Michael Sandberg, 28, was forced at gunpoint from a parking lot into his Tucson condominium by two men later identified as Douglas Gretzler and Willie Steelman. His wife, Patricia, was at home when the intruders held the couple hostage, bound and gagged them, and shot both. Gretzler shot Michael in the head, muffling the gunshot with a pillow; both were later found dead in their residence.

The perpetrators were arrested two days later in Sacramento after committing further violent crimes. A vehicle registered to Michael Sandberg was recovered with them, and fingerprints from the Sandberg scene matched Gretzler and Steelman. Gretzler later confessed while in custody and both men were convicted for the killings.

If anyone knew Michael or Patricia Sandberg, lived near their condominium, or has information about the events of November 3, 1973, please share what can help complete the record.