SFGATE: Inside the 'dystopian' technique used to hunt the suspect

Inside the 'dystopian' technique used to hunt the suspect
Published on April 28, 2018 at 04:33PM by Avi Selk, The Washington Post
For decades, police say, the DNA of the "Golden State Killer" sat in evidence storage -- a unique genetic fingerprint that could identify definitively the man who killed 12 people and raped 45 women across California between 1976 and 1986. And for decades, those samples were basically useless to investigators, who ran into the same wall that has frustrated police since the invention of DNA forensics: A genetic fingerprint is not much good unless you know whom it belongs to. Whoever the killer was, he apparently was not one of the millions of convicts, offenders and arrestees in the FBI's national DNA database. The genetic samples from all those crime scenes identified the Golden State Killer merely as a big flashing question mark.
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