Infuriating waste of a press conference

The authorities at Brown just wrapped up a press conference that revealed almost no new information, other than the shooter is in his twenties.  What was the point?  Why are we not allowed to know anything about the identity of the alleged shooter? 

Update: Benjamin Erickson

The person of interest authorities took into custody in connection with the shooting at Brown University is Benjamin Erickson, a 24-year-old originally from Wisconsin, two people briefed on the investigation told The Washington Post on the condition of anonymity.

He drove 17 hours to Brown?  What.