Yvonne Shelly Antosh was a 19-year-old white woman from Vancouver, British Columbia, who was murdered in Washington state. She was last seen at the Ben Carol Motel in SeaTac along Pacific Highway South on May 31, 1983. Her remains were found months later on October 15, 1983, near Lake Sawyer, close to Auburn, Washington.

Investigators early on linked her death to nearby victims in what became known as the Green River killings. Her exact cause of death could not be determined, but the case was classified as a homicide. In November 2003 Gary Leon Ridgway pleaded guilty to Antosh’s murder along with many others; he received consecutive life terms without the possibility of parole.

Many details about Antosh’s final hours remain unknown. Did anyone in the SeaTac or Vancouver area have contact with her in the days before May 31, 1983?