Paul Holes

Introduction to Paul Holes and the Golden State Killer Case

Paul Holes is a retired investigator from the Contra Costa County District Attorney's Office in California, widely recognized for his pivotal role in the decades-long hunt for the Golden State Killer, later identified as Joseph James DeAngelo. For over 20 years, Holes dedicated much of his career to solving this notorious cold case, which involved a series of rapes, murders, and burglaries across California from the 1970s to the 1980s. His persistence and innovative approach to forensic technology ultimately contributed to the breakthrough that led to DeAngelo’s identification and arrest in 2018.

Biographical Context and Career

Paul Holes began his career in law enforcement with a background in forensic science, holding a degree in biochemistry. He joined the Contra Costa County District Attorney's Office, where he specialized in cold case investigations. Over the course of his tenure, Holes became deeply involved in the investigation of the East Area Rapist—later known as the Golden State Killer—a serial offender responsible for at least 13 murders, over 50 rapes, and more than 100 burglaries. Holes’ expertise in DNA analysis and his commitment to leveraging emerging technologies set him apart as a key figure in the case. He retired on April 23, 2018, just one day before DeAngelo’s arrest was publicly announced, marking the culmination of his long pursuit of justice in this case.

Role in the Investigation and Forensic Genealogy Breakthrough

Holes played a critical role in advocating for the use of forensic genealogy, a then-novel investigative technique, to solve the Golden State Killer case. In collaboration with the FBI and genealogist Barbara Rae-Venter, Holes facilitated the upload of crime scene DNA to GEDmatch, a public genealogy database. Through meticulous family tree analysis, this approach identified Joseph James DeAngelo as a suspect in 2018. Holes’ determination to explore cutting-edge methods, even as traditional investigative avenues stalled, was instrumental in finally linking DeAngelo to the crimes. His work not only led to the resolution of one of California’s most infamous criminal cases but also popularized forensic genealogy as a tool for solving other cold cases.

Beyond his direct involvement in the investigation, Holes maintained key professional relationships that amplified his impact. His collaboration with Barbara Rae-Venter was essential to navigating the complex genealogical data that pinpointed DeAngelo. Additionally, his decades-long focus on the case created a direct connection to DeAngelo’s eventual arrest on April 24, 2018, in Sacramento, California. Holes’ contributions have since been documented in various accounts, including detailed profiles of his investigative strategies and persistence in pursuing justice for the victims of the Golden State Killer.