Authorities have determined a 45-year-old South Carolina trooper was driving around 110 mph when he lost control of his patrol car on a rural two-lane road.
Cpl. D. Kevin Cusack died instantly in the March 27 one-vehicle crash on state Highway 200 about six miles south of Lancaster near a curve where a side road intersects the highway at an odd angle.
Lancaster County deputies said Tuesday that Cusack didn't have his blue lights on and had not called in a traffic stop to dispatchers.
Authorities say he might have been trying to catch up to another vehicle, but not reported it yet.
Deputies say tests determined Cusack was driving 104 mph to 111 mph at the time of the crash.