When the Golden State Killer — born Joseph James DeAngelo — was caught in 2018, more than three decades after his last known murder, it was a triumph of investigative ingenuity.
Using DNA evidence collected from crime scenes well before "genetic fingerprinting" entered police toolkits, officials were able to identify DeAngelo, a former law enforcement officer, via a genealogy database and DNA samples taken from his trash.
But for the true-crime community, the closing of this long-cold case was also proof that their obsessive sleuthing and the pressure they exert on police could bring a killer to justice.
Author Michelle McNamara was fixated for years on the Golden State Killer, who is believed to be responsible for at least 13 murders and.
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