Deputy Coroner David Burnett listed the cause of death as traumatic brain injury.
Family members had gathered at Medical College of Georgia's Children's Medical Center since the April 12 incident. Doctors told them that bleeding around the boy's brain had subsided, a positive sign, but that the brain activity which specialists continued to look for never emerged.
No charges have been filed, and the South Carolina Highway Patrol has not released any substantial information as it continues with the investigation. Funeral arrangements are pending .