CDC security guards stopped White from driving into the campus on Friday before he parked near a pharmacy across the street and opened fire from a sidewalk. The bullets pierced “blast-resistant” windows across the campus, pinning employees down during the barrage. More than 500 shell casings were recovered, the GBI said.

The gunman who opened fire at the Atlanta headquarters for the US Centers for Disease Control and Prevention broke into his father’s safe to get the five firearms he brought to the scene of last Friday’s shooting,