Their deaths -- and injuries to dozens of others -- came after a man dressed head to toe in protective tactical gear sprayed the Century 16 theater in Aurora with bullets from an AR-15 rifle , a 12-gauge shotgun and a .40-caliber pistol , weapons police discovered at the scene . The preliminary hearing tied to the July 7 shooting is expected to last several days . Prosecutors will call witnesses , outline evidence ; 12 were killed in the theater shooting . The defense is expected to present a ` ` diminished capacity '' defense . Suspect James Holmes faces multiple charges , including murder and attempted murder .
The preliminary hearing tied to the July 7 shooting is expected to last several days . Prosecutors will call witnesses , outline evidence ; 12 were killed in the theater shooting . The defense is expected to present a ` ` diminished capacity '' defense . Suspect James Holmes faces multiple charges , including murder and attempted murder .