I met a child the other day, or rather he stared into the depths of my soul.... and i really truely felt he wished me dead. It was quite frightening. Still i felt the need to explore this, to understand why.
Also i have known a sociopath, very well indeed, and no it was not easy to see... it took me nine years to work it out because he believed in everything he said (and did) at the time he said (and did) it. Even he is not beyond redemption