Sounds like a high capacity pistol, like the Glocks that many departments and individual police favor these days, but possibly a rifle, with one reload.
A male witness who heard the gunshots and was interviewed on Channel 12 (NBC), said it sounded like firecrackers going off (he was at least a block away). He said it was a LOT of gunshots that he heard... Could’ve been more than one gun. The authorities only held a VERY short news conference so at this point I’d say anything is possible. If another cop was there it could’ve been a gun fight at that point... I guess we’ll hear more in the coming days. The MO though is that the suspect was upset over a dispute with an ex-girlfriend (I think it was her apartment IIRC).