` ` It was a pretty rapid pace of fire in that theater , '' the police officer says . More than 6,000 rounds of ammunition was bought through online purchases , he says . AR-15 , Glock handgun and shotgun used in deadly movie shooting . Note : Shotgun blast across row of theater seats could kill or wound 15 people .
`` It was a pretty rapid pace of fire in that theater , '' the police chief says . More than 6,000 rounds of ammunition was bought through online purchases , he adds . AR-15 , Glock handgun and shotgun used in deadly movie attack . Expert : Shotgun blast across row of theater seats could kill or wound 15 people .