The old man was in a wheelchair. But he refused to drop the knife. And he was a threat - should he have suddenly lunged out of the chair, he easily could have stabbed one of the cops.
This is not the easiest of calls. But I’d say the cops acted within reason … except they were too damn close when they were talking to the guy.
I think he wanted it like OKSooner says .
Really strange incident
And again, they’ve put the officers on trial. I think that’s going to far
It was a butter knife
Fire hose or extinguisher is another option.