It's appalling that the Police have yet to name the shooter yet BTW. Who's privacy are they trying to protect? I know the police shot the guy and the SIU has to investigate, but that should take 5 minutes. Dude was shooting people at random, any and all measures should have been taken to take the guy down.
I suspect the police are trying to gather as much information as possible in order to pre-empt speculations on motives. The press are apparently co-operating because none of the "eye-witness" reports I have seen include any description of the shooter.