Between 1982 and the late 1990s, dozens of women vanished along the highways and riverbanks of King County, Washington. Many were young. Many were never reported missing right away. All were vulnerable.

This episode of Unsaid Case Files examines the Green River Killer—Gary Leon Ridgway—one of the deadliest convicted serial killers in U.S. history.

Beginning with the discovery of 16-year-old Wendy Lee Coffield in the Green River, we trace how a pattern slowly emerged, how early warnings were missed, and how a killer operated in plain sight for nearly two decades. Through investigative failures, advances in forensic science, and the voices of those left waiting, this two-hour episode focuses not just on the man who killed—but on the women who were forgotten.