I don’t go by often, but usually there aren’t people outside around there. From the first news report, the only who might have witnessed it was the Indian guy in the pizza store. He was inside the building and making pizza, so the perp was long gone by the time he rushed out. I don’t think it’s accurate, in this case, to say anybody stood there in shock, or could have run after him.
Witnesses (plural -CO) said the victim was injured but refused to go to the hospital.
Just taking my impression from the report.