Suspect was arrested in 20 on suspicion of `` terrorist threats and acts '' Police say Shooter , March , faces aggravated assault charges . Witness to WSB affiliate WSB : Shooter said `` he was not afraid to die '' Michael Brandon Hill was armed with an AK-47 `` and a number of other weapons , '' police say .
Suspect was arrested in March on suspicion of `` terrorist threats and acts '' Police say Michael Brandon Hill , 20 , faces aggravated assault charges . Witness to CNN affiliate WSB : Shooter said `` he was not afraid to die '' Shooter was armed with an AK-47 `` and a number of other weapons , '' police say .