On April 24, 2018, law enforcement arrested Joseph James DeAngelo Jr. in Orange County, California, marking the end of one of America's most elusive serial criminal investigations. The former police officer, then 72 years old, stood accused of being the Golden State Killer—a moniker encompassing three decades of terror across more than a dozen California counties.

DeAngelo's criminal activity spanned from 1974 to 1986, operating under different identities depending on the nature of his crimes. As the Visalia Ransacker, he committed at least 120 burglaries between 1974 and 1975. From 1976 to 1979, he operated as the East Area Rapist, assaulting 50 or more victims across the Sacramento region and surrounding areas. His most violent phase came as the Original Night Stalker, when he committed 12 to 13 murders between 1979 and 1986, many involving couples targeted in their homes across southern California counties including Santa Barbara, Ventura, and Orange County.

For decades, these cases remained unconnected in the public consciousness. In 2001, a breakthrough in DNA technology allowed investigators to link several murders—including those of couples Smith-Harrington, Witthuhn, and Cruz—to rapes committed in Contra Costa County. Later, DNA analysis connected the Domingo–Sanchez murders to the East Area Rapist. Yet the cases remained cold, and DeAngelo evaded identification despite advances in forensic science.

The turning point came in December 2017, when Detective Paul Holes and FBI lawyer Steve Kramer uploaded DNA from a Ventura County rape kit to GEDmatch, a public genealogy database. The move represented a shift in investigative strategy—using forensic genealogy to identify suspects through family connections rather than direct criminal database matches. The database search identified 10 to 20 relatives sharing great-great-great-grandparents with the DNA sample, providing investigators with a family tree to explore.

Georgist Barbara Rae-Venter and her team built a comprehensive family tree from the GEDmatch results, methodically narrowing the possibilities. The genealogical work eventually pointed to Joseph James DeAngelo Jr. as the most likely suspect. Investigators obtained a DNA sample from DeAngelo through covert surveillance—a standard practice in the final stages of major investigations. When his DNA matched biological evidence from multiple crime scenes, law enforcement moved to arrest.

The charges filed against DeAngelo initially included eight counts of first-degree murder, marking the first public connection between the Visalia Ransacker burglaries and the rape and murder cases. The breadth of the indictment reflected law enforcement's confidence in linking the three separate criminal personas to a single individual.

DeAngelo's capture represented a watershed moment in American criminal investigation. The FBI had offered a $50,000 reward in 2016 for information leading to his capture, but it was neither money nor eyewitness testimony that ultimately solved the case—it was the combination of legacy DNA databases, genealogical databases, and a willingness to explore unconventional investigative tools. His arrest at age 72, decades after his crimes ended, demonstrated that advances in forensic science and changes in privacy norms around genetic data could reopen cases thought permanently unsolved.

In June 2020, DeAngelo entered a guilty plea, ending the possibility of a prolonged trial and the further trauma it would have inflicted on surviving victims and their families.

**Sources**

https://en.wikipedia.org/wiki/Joseph_James_DeAngelo

https://www.biography.com/crime/golden-state-killer

https://pmc.ncbi.nlm.nih.gov/articles/PMC7219171/

https://www.crimeandinvestigation.co.uk/articles/7-terrifying-facts-about-golden-state-killer

https://www.ojp.gov/ncjrs/virtual-library/abstracts/genetic-privacy-and-case-golden-state-killer-diving-science