Even if the gun was real the police had confiscated it. If they then wanted to shoot to immobilise Mohammed, surely they need not have shot to kill. A couple of bullets in the leg would have done the trick. When a state's police force has no interest in using minimum force to achieve its aim, something is very rotten in the state.
Austrian chancellor: Austria and Germany will allow migrants entry (Reuters)
from the article: The life and death of a toy terrorist