Law enforcement officers collected more than 500 shell casings and five firearms from the scene of Friday's shooting that killed DeKalb County police officer David Rose near the CDC's Clifton Road headquarters and Emory University.

GBI Director Chris Hosey told reporters the shooter, 30-year-old Patrick Joseph White, was armed with five firearms that belonged to his father. The shooter had no known prior criminal history.

The man who opened fire at the U.S. Centers for Disease Control and Prevention headquarters last week, killing a police officer, died by suicide.