Shirley Baldwin was 27 when she was last seen alive about 2:30 a.m. on Sunday, April 4, 1976, in Lisbon Falls, Maine. Later that day she was found on the kitchen floor of her apartment; authorities determined she had died by homicide and officials at the time described the scene as an apparent homicide.

The Lisbon Police Department and the Maine State Police investigated the death as a murder, but those inquiries did not produce a publicly identified suspect or any arrests. The case remains officially unsolved and is listed among Maine’s open homicide investigations.

If anyone knew Shirley, lived near her apartment, or has information about events in Lisbon Falls on April 4, 1976, please come forward to investigators.