On the evening of Feb. 5 in Tewksbury, a 67-year-old man was walking on Salem Road when he was struck by a car. The accident occurred near the Wilmington town line. Police report that the driver, a 24-year-old woman, stopped her car approximately 50 yards further down the road. Her speed at the time of the accident was not released.Shortly after the accident, the man was flown to Boston Medical Center via helicopter for treatment of a serious head injury and other injuries. The man's condition is unknown.