State Troopers are investigating a fatal hit and run at about 9:42 Monday night in the 5500-block of Hwy 224 in Hunt County. A dark-colored Chevrolet Avalanche struck 59-year-old Cynthia Smith of Greenville while she walked across the highway. The driver failed to stop. Witnesses say the vehicle damaged the front left headlight, and Troopers ask anyone, including automotive body shop owners or employees who have information on the crash, to notify them.