![]() ![]() It was a landmark case, and a novel way to bring a murderer to justice. DeAngelo was investigated and charged with 13 counts of murder, among other serious charges. Painstakingly, they narrowed their search down to DeAngelo, who had been living near where the crimes were committed. Investigators identified the killer's distant relatives using the vast database of DNA data in GEDmatch. As described in The Atlantic, the process investigators used was similar to how an adoptee's biological parents might be found using a genealogical database. ![]() It was like having a criminal's fingerprints without a fingerprint catalog to compare it against. Without a huge DNA database to match the Golden State Killer's unique genetic fingerprint against, investigators were groping in the dark. Sacramento PD investigators had taken the suspect's DNA from his crime scenes, but until 2018, it had been useless. The public was baffled too, as they learned more about how the killer had been brought to justice. ![]()
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