Yes. But wasn't an ambulance allegedly also on it's way ?
I get the idea that the 'teens' weren't blocking the entire road, but according to the witness, when the cop backed up, Mike was close enough to the door that he inadvertently knocked the door back closed (what kind of cockamamie bs is that?).
It seems to me more like this;
The cop drove past them, yelling at them to get on the sidewalk. They refused. He backed up either because he was going to make them move, or because he recognized Mike from a BOLO call. As he backed up, Mike charged the police car.
The rest we know, more or less.
The ambulance was only on its way AFTER the shooting —