For the second time this year, Investigators used a public DNA database to solve a cold case and find a murderer.

 A 55-year-old truck driver, William Talbott was arrested today in Washington State after being fingered in a 30-year-old double murder case.

    How they found him: According to Buzzfeed, investigators located Talbott’s family members after uploading old crime scene DNA to GEDMatch, a crowdsourced database that genealogists use to compare DNA and build a family tree this is the same database which used in April to locate the Golden State Killer.

    Nowhere to hide: DNA databases are now so large that nearly everyone has a relative who has joined one.