For more than 40 years, a string of rapes and murders scattered across California went by different names in different jurisdictions. Sacramento investigators in the 1970s called him the East Area Rapist. Southern California detectives pinned a series of killings on someone they dubbed the Original Night Stalker. It took decades, and a forensic tool that didn't exist for most of that time, to prove they were hunting the same man.
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The attacks started in the mid-1970s in the suburbs east of Sacramento. A masked intruder broke into homes at night, often binding victims and ransacking rooms before disappearing. Things escalated from burglary and sexual assault into murder as he moved south, with attacks documented in Contra Costa, Santa Barbara, Ventura, Orange and Los Angeles counties into the early 1980s. Investigators eventually attributed at least a dozen killings and dozens of sexual assaults to the same perpetrator, based on ballistics, physical evidence and behavioral patterns, according to court records and reporting compiled over the years.
What made the case so maddening for law enforcement was the sheer geographic sprawl. Local police departments in the 1970s and 1980s had limited ability to share evidence across county lines. Composite sketches varied. DNA testing, which would later become the case's defining breakthrough, wasn't part of standard investigative practice when the attacks were happening. By the time forensic science caught up, the trail had gone cold for years at a stretch.
Author Michelle McNamara, who wrote extensively about the case and is credited with popularizing the term "Golden State Killer" to unify the East Area Rapist and Original Night Stalker cases under one identity, died in 2016 before it was solved. Her book on the investigation, published posthumously, renewed public attention on the case and the possibility that modern forensic techniques could finally crack it.
That break came in April 2018, when investigators announced the arrest of Joseph James DeAngelo, a former police officer living in Citrus Heights, a Sacramento suburb. Authorities said they identified DeAngelo using a technique called forensic genetic genealogy: uploading crime-scene DNA to a public genealogy database to build out family trees and narrow the search to a single suspect. Investigators then obtained a discarded DNA sample from DeAngelo to confirm the match before making an arrest, according to the Sacramento County District Attorney's Office and other law enforcement agencies involved in the case.
The method was new to criminal investigation at that scale, and the DeAngelo arrest is widely credited with opening the door to genetic genealogy as a cold case tool nationwide. Dozens of unsolved cases have since been reexamined using similar techniques, though the approach has drawn scrutiny from privacy advocates concerned about the use of consumer DNA databases in criminal investigations without the direct consent of everyone whose genetic information ends up searchable.
DeAngelo had worked as a police officer in Exeter and Auburn during the years the attacks took place. He was charged with multiple counts of murder across several California counties. Given the scope of the case, prosecutors from those jurisdictions coordinated on a joint proceeding rather than pursuing separate trials county by county, an arrangement unusual in scale even by California standards.
In 2020, DeAngelo pleaded guilty to 13 counts of murder and admitted to numerous other uncharged rapes as part of a deal that avoided the death penalty. During a court hearing that stretched over multiple days, victims and family members of those killed got to speak about the lasting impact of the attacks, decades after they occurred. DeAngelo was sentenced to multiple consecutive life terms without the possibility of parole.
The case remains a touchstone in California law enforcement circles for reasons beyond its grim body count. It showed how fragmented jurisdiction and pre-digital evidence-sharing hampered cold case work for decades, a problem departments have since tried to address through statewide DNA databases and improved interagency coordination. It also became a case study in the promise and limits of genetic genealogy, a technique now used by cold case units across the state and country but still subject to debate over its legal and ethical boundaries.
For the communities where the attacks took place, particularly the Sacramento suburbs that endured the earliest wave of break-ins and assaults, the case left a lasting mark on how residents thought about home security and neighborhood watch programs. Those practices spread nationally in the years following the East Area Rapist attacks. Some of those community responses, born out of fear in the 1970s, are still part of California's civic fabric today.
The Golden State Killer investigation also stands as a reminder of how long unsolved violent crime can shadow a state's institutional memory. Retired detectives who worked the case in its early years spent entire careers without seeing it closed. Advances in forensic science, not new eyewitnesses or confessions, ultimately provided the answer, arriving decades after the last known attack and years after some investigators had given up hope.
DeAngelo, now in his 80s, remains incarcerated in California. The case file, spanning five decades and multiple counties, is frequently cited in law enforcement training on cold case methodology and the use of genetic genealogy, a field that barely existed when the first attacks were reported to police in the 1970s.