From the press conference.
Shooter is contained.
11 victims, 1 DOA
This seems to be the location were the perp is, but they're saying it started elsewhere.
Loop 250 Collision Center West - Google Maps The media is thinking it might be a man named Victor Mata Villarreal who is wanted for attempted capital murder of a police officer. He shot a police officer last night. The officer is expected to be okay. Police will not confirm any details on the shooter or the victims.
Edit: Original report was incorrect; the officer was not injured.
"If you will not fight for right when you can easily win without blood shed; if you will not fight when your victory is sure and not too costly; you may come to the moment when you will have to fight with all the odds against you and only a precarious chance of survival. There may even be a worse case. You may have to fight when there is no hope of victory, because it is better to perish than to live as slaves." - Sir Winston Churchill