I would even go as far as saying policemen killing people, armed or not should be solvable. Why don't we have nonlethal incapacitant weapons by now? Something t

I would even go as far as saying policemen killing people, armed or not should be solvable. Why don't we have nonlethal incapacitant weapons by now? Something that would immediately make you pass out or something. Is there even any R&D put into this?