Folks on this thread have a lot of catching up to do. The monday night shooting had eyewitnesses. The weapon has been identified as a Chinese made AK-74. It's the same weapon used in at least 5 other shootings (the rest are assumed to be the same). The perp was middle eastern in appearance, according to three witnesses. He got into a white van and drove away. He was seen crossing the interstate median to avoid the roadblocks. the witness to this got a partial licence plate number. There's more, but I'm out of breath.
At least get up to speed on the other threads before repeating week-old theories.