@greensolace what your "expecting too much" mean coz my expecting too much is different from yours so can u explain?you said many people but sangwoo doesn't come to those "many" people there's few people like sangwoo who thinks what they are doing is completely OK. Some people get very agitated after trauma some just doesn't react. Sangwoo was both outside he was calm but inside he was agitated to the point that felt joy over killing people. That's where he lost his mind. He didn't care about things what he is done and don't feel abnormal doing it and living a life as a normal person adapted to social life. That's how there are so many people crawling in the outside world thinking they are normal and doesn't need treatment that's how they end up doing crimes. What I am saying is if psycho doesn't care about his doings then its bound to happen crimes like this. You are right he didn't cared enough to get treatment becoz he doesn't gave too much thought about his doings. If he was in his right he would go to therapist Coz every normal person would do so. It means that he already lost his mind before realizing.