Unfortunately when the potential perp is dead the responsibility falls in the lap of the police shooter. Thousands of incidents daily don’t reach the level of deadly force, and most normal people respond appropriately when confronted by LE. I am talking only of a method to avoid the potential for deadly force when you have a combatant person who you have no idea what is driving them. They may not be in control of themselves and you need backup and a vet with a dart gun and tranquilizer rather than a bullet. Even a bean bag might be preferable. Now we are talking more money for equipment.
Two axioms come to mind:
1. You can't fix stupid.
2. You can make most anything fool-proof but you can't make it damn-fool proof.
This was a case of a man acting as if he was armed and ready to shoot cops - while there may be after-the-fact solutions, one can't expect a cop to just stand there and wait for the bullet - or to allow a potential bullet being sent after regular civilians.
The sad thing is that we have gone from law and order to "give the bad guys some leeway to do damage. If we went back to the 'olden times" where looting/mayhem/arson/destruction of property were valid shoot situations, there would be a whole lot less of the terrible situations going on in fairly short order and more humane actions on others might become viable again.