For decades, the Golden State Killer terrorized California, leaving a trail of unsolved crimes. His identity was a ghost, until a groundbreaking forensic tool emerged. In 2018, investigators turned to genetic genealogy. They used crime scene DNA to build a family tree from public databases like GEDmatch, tracing distant relatives of the unknown killer. This innovative technique allowed them to narrow down the possibilities, eventually leading them to Joseph DeAngelo. His arrest finally brought an end to one of America's most elusive serial killer cases. This story shows how science is constantly evolving to bring justice to victims and close the coldest cases. If you're interested in forensic science and the pursuit of justice, this will amaze you.

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