A drug investigation becomes a death investigation in Wayne County.

Deputies say they stopped a driver in the Dudley area Thursday as part of a drug investigation.

They say the driver -- 56-year-old Reginald Sherwood Grady of Goldsboro -- started having convulsions.

First responders treated Grady for a lengthy time.

He was pronounced dead at the scene.

The SBI is investigating, which is routine procedure if officers are present when a death occurs.

The Medical Examiner's Office will conduct an autopsy on Grady to determine the cause of death.