[Part 2 of 4] On December 20 1968, teenagers David Faraday and Betty Lou Jensen were gunned down in the middle of the night on a deserted road in Benicia, California. Six months later, another young couple, Darlene Ferrin and Michael Mageau, were shot in a parking lot in nearby Vallejo. When an anonymous caller informed the police that he’d committed both attacks, the hunt was on.