Police seek pickup driver in Dallas-area shootings

Dallas police say they're investigating several people in four rush-hour shootings on Dallas-area roads that left two people dead. Police are hailing a victim from Kentucky as a hero for managing to stop his 18-wheeler before he died.  Dallas police have interviewed at least two people who witnessed one of the apparently random Monday afternoon shootings and were asking any other witnesses to step forward.
  Witnesses described the suspect in the first shooting as a balding white man in his 40s, driving a tan Ford F-150 extended cab pickup.
  The gunman's victims include 42-year-old truck driver William Scott Miller, who was about to fly home to his wife and children in Frankfort, Kentucky, for the holidays.

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