The idea of your own action being evil but sacrificing yourself in order to change the world... that is the killers chosen path of being righteous. I think that would be the killers way of thinking. The killer being evil or righteous is not our place to judge. It's better to leave that up to society and ideology. We only have to catch the killer. It has no correlation to cleansing the world if we catch the killer. Righteousness...Evil...we should think of the consequences of everything. If we catch the killer, then he is evil. If the killer controls the world, then he is righteous. - Light Yagami