GREENVILLE, S.C. — A man has been charged with a traffic violation in a wreck that killed a South Carolina Highway Patrol trooper last month.

Greenville County Sheriff’s Sgt. Ryan Flood said in a news release that 33-year-old Tuan Quoc Trinh of Simpsonville has been charged with failure to stay in his lane in the Oct. 24 crash on Interstate 385.

Trooper Daniel Keith Rebman was in his patrol car when it was struck by Trinh’s pickup truck. Rebman died later that day.

Deputies administered field sobriety tests on Trinh and did not find any impairment. Investigators think Trinh fell asleep behind the wheel moments before crashing into Rebman’s car. Investigators said he was driving just over the speed 65 mph (105 kph) limit.

It was not known if Trinh has an attorney.