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An armed passing motorist was credited with saving the life of an Arizona state trooper by shooting and killing a gunman who ambushed the trooper in the middle of a lonely interstate highway before dawn Thursday.
"I would just say at this point, thank you, because I don't know that my trooper would be alive today without his assistance," Col. Frank Milstead, director of the Arizona Department of Public Safety, said after he met with the seriously injured trooper at the hospital.