On December 26, 1985, 79-year-old Jean Muir was found murdered in her Salt Lake City home. She had spoken by telephone with her sister around 12:30 p.m. that day, finalizing plans for a trip to Utah County, and the sister arrived at Jean’s house about 1:00 p.m. to discover the homicide.

Investigators noted Jean’s car was missing from the driveway at the time the body was found. A few days later the vehicle was recovered several miles away, abandoned behind a business. The Unified Police Department handled the investigation but no arrests have been announced and no suspect or suspects have been publicly identified. The case is now cold.

Who knew Jean, her movements that afternoon, or the whereabouts of her car after the phone call on December 26, 1985?