We have an English word that describes what was done to this man - SLAUGHTER!
I carried a badge for over 30 years; this was uncalled for, was incompetently handled, and verges on murder.
Something is wrong here. The guy had a mental problem. A situation like this calls for a taser. As soon as the guy stopped moving towards them they should have stopped the shooting.
Having SAID that, part of the problem here is the “police force of occupation”. This is turning into a racial incident - white cops versus black victim. We need to re-establish residency requirements for cops. If they don’t live in a jurisdiction in which they want to work, they should move there. If they were locals they might have known this guy better as a mental case. At the very least, some of them or all of them, might have been black which would have diffused the anger.
There should be a better way to handle a mental case with a knife than blowing him away with 46 bullets. Had the guy had a gun, my reaction would have been totally different and I think they would have been wholly justified.