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.

A lone gunman fired 180 shots at the Atlanta Centers for Disease Control and Prevention (CDC) headquarters on Friday, with bullets piercing about 150 windows, the Associated Press reported, citing internal reports.

The man who attacked the CDC headquarters in Atlanta on Friday fired more than 180 shots into the campus and broke about 150 windows, with bullets piercing “blast-resistant” windows and spattering glass shards into numerous rooms,