If "clean coal" is the right term for coal that is not as toxic in one of the steps of using it, then we may call "good hitman" to the ones who don't kill child

If "clean coal" is the right term for coal that is not as toxic in one of the steps of using it, then we may call "good hitman" to the ones who don't kill children nor woman; or we may call "positive genocide" the massive killing of only convicted criminals.