Officials are still investigating a shooting at the Centers for Disease Control and Prevention headquarters in Atlanta, Georgia, that killed a police officer on Aug. 8. The suspect, Patrick Joseph White, 30, may have been disgruntled over vaccine side effects before perpetrating the shooting, according to multiple reports.

DeKalb County Police Officer David Rose was fatally shot Friday. The suspect, who a neighbor said had expressed anti-vaccine sentiments, was also shot and died from his injuries.