Quiet serial killers may hide in plain sight as DNA unmasks dead 1970s Pennsylvania strangler, expert says
James Richard Clark Sr. left DNA at both 1970s crime scenes, but advanced cybergenetics testing has only recently linked him to the two killings.

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Quiet serial killers may hide in plain sight as DNA unmasks dead 1970s Pennsylvania strangler, expert says (opens Fox News in a new tab)
James Richard Clark Sr. left DNA at both 1970s crime scenes, but advanced cybergenetics testing has only recently linked him to the two killings.

