The man who fired more than 500 rounds at the US Centers for Disease Control and Prevention appears to have tried to get onto the agency’s campus two days before the August 8 shooting, according to an agency email obtained by CNN.

An internal CDC email reveals that the Georgia man who shot at CDC buildings on Aug. 8 likely tried to enter the campus two days earlier.

The man who attacked the US Centers for Disease Control and Prevention likely attempted to enter the Atlanta campus days before the shooting earlier in the month.