According to a GSP press release, troopers say the unknown vehicle was traveling east on Hazelbrand Road near McMahan Road Aug. 18 when it struck a pedestrian in the eastbound lane.
The pedestrian, identified as 52-year-old Patricia Ann McGuire of Covington, died at the scene.
The exact time of the crash is unknown, but troopers believe it occurred between the hours of 2:00 a.m. and 4:30 a.m.
The make and model of the vehicle is also unknown but authorities say it is likely a truck, SUV, van or other vehicle with high ground clearance.
Anyone with any information is asked to call the Troop E Communications center at 706-210-2050.