The identity of the driver was not important; the fact that he was dangerously out of control and a threat to the life of others was.
The police officer made his decision to shoot based on the fact that Kaba's action in ramming the cars could have killed one or more of the police at the scene. If he had managed to ram the police cars aside he would have been driving very dangerously in an attempt to escape and likely to have crashed into other vehicles and/or people. He was a severe risk to the lives of others.
No fun being old under Andy Burnham .
So Harry and family are coming back!
