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Between 1982 and 1998, Gary Leon Ridgway murdered at least 49 women in and around Seattle and Tacoma, Washington, making him one of the most prolific serial killers in American history. Most of his victims were young women, many of them sex workers or runaways, whom he picked up along the Pacific Highway South corridor. He strangled them, dumped their bodies in wooded areas, and for nearly two decades, walked free.

The investigation was hampered from the start by institutional indifference. Law enforcement operated under an unofficial but widely understood attitude known as NHI — "No Humans Involved" — a designation applied to cases involving sex workers, homeless individuals, or drug users. Victims in these categories were deprioritized, their cases worked less aggressively, their families given fewer resources. Detectives who did push for more attention were often met with bureaucratic resistance. The assumption that these women had placed themselves in danger, that their deaths were somehow less urgent , allowed Ridgway to keep killing for sixteen years.

He was finally arrested in 2001 after DNA technology linked him to several victims. In 2003, Ridgway pleaded guilty to 48 murders in a deal that spared him the death penalty in exchange for helping locate the remains of still-missing victims. He was sentenced to life in prison without the possibility of parole.

Sources:

Sources: Green River Killer Research

1. Rule, Ann. Green River, Running Red. Free Press, 2004.
2. Smith, Carlton & Guillen, Tomas. The Search for the Green River Killer. Penguin, 1991.
3. Prothero, Mark & Smith, Carlton. Defending Gary. Union Square Press, 2006.
4. King County Superior Court, Case No. 03-1-00175-9. Guilty Plea & Sentencing Documents, 2003.
5. King County Prosecuting Attorney's Office. Statement of Defendant on Plea of Guilty, 2003.
6. Washington State Attorney General's Office. Green River Task Force Investigative Records. Washington State Archives.
7. Federal Bureau of Investigation. Gary Ridgway Case Files. FBI Vault, vault.fbi.gov.
8. King County Medical Examiner's Office. Victim Autopsy & Identification Records. King County Public Records.
9. The Seattle Times. Green River Killer Archive, 1982–2003. seattletimes.com.
10. The Tacoma News Tribune. Green River Killer Coverage Archive.
11. Seattle Weekly. "The List" Investigative Series on NHI Classification and Victim Deprioritization.
12. FBI National Center for the Analysis of Violent Crime. Serial Murder: Multi-Disciplinary Perspectives for Investigators. U.S. Department of Justice, 2008.
13. Criminology & Public Policy Journal. "Policing Sex Work." Various authors.
14. Violence Against Women Journal. "Vulnerability and Victimization: Street Sex Workers and Violence." Various authors.
15. Green River Killer: Mind of a Monster. Investigation Discovery, 2019.