The suspect was tackled by a bystander and taken into custody. He was not injured. Witnesses described him as in his late teens or early 20s.”
Since no ethnicity is given I assume that in all likelihood he didn’t appear to be very anglo.
If the discription holds up. May be: Cartel hit? Dream Act pissed off brainless leftie?
The age suggests Mexican banger all the way.
No matter who it turns out to be, this is really, really bad.