I've never seen you make a reasonable post yet. Hopefully that changes eventually. This was a clear show of excessive violence by the police. The police are supposed to discharge their firearm only under extreme circumstances, and firing on a person armed only with a close quarters weapon was unnecessary. They would have had ample time to disarm him or fire upon him if he even looked to attack somebody, but he didn't. This is so far beyond the use of reasonable force in detaining a suspect.
Things like this are becoming more common. There was that video of where the police fired upon that dog in front of his owner, like four times, which is once again, excessive violence. Thankfully, things like this don't seem as common in Australia.