Children's cruelty

I just watched a TV show. TV show was about the fact that two eight years old children killed a five years old boy.It was scary and strange to look for. The question is why they did it and who is guilty: the children or their parents, which do not look after their children. One of main the responsibilities of the parents is to teach the child to distinguish between what is good and what is bad .....Children's cruelty has always existed, but not this .... How to deal with these children?

    8Theresa Gould
    I don't know, it baffles me. Where in the world is the restraint among people nowadays? I agree with Elena though that everyone, young and old have the potential to be dangerous, but it's those with self-control and restraint that won't follow through with harmful or dangerous thoughts, you know?