The man suspected of opening fire outside the Atlanta headquarters of the Centers for Disease Control and Prevention on Friday had been critical of the Covid-19 vaccine, authorities said.A search of Patrick Joseph White’s home revealed written documents in which he indicated his discontent with the vaccine,

All CDC employees nationwide, except for essential on-site personnel, have been instructed to work remotely on Monday as Georgia investigators continue probing Friday's deadly active shooter incident near the agency's Atlanta headquarters, according to a letter obtained by ABC News.

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.