From the questionable Tilda Swinton, currently starring as the mother of a sociopath in the film We Need To Talk About Kevin, from The Guardian:
The rest of the article is interesting as well.
"Years ago, when James Bulger was murdered, every newspaper front page was talking about evil. At that point, having suppressed it for years, I remembered when I was four or five, I tried to kill my own brother. He was newly born and I was disappointed, because he was the third boy. That was enough as far as I was concerned.I went into his room to kill him, saw some ribbons from a bonnet going into his mouth, and began to pull them out. And I was discovered saving his life. So I had this strange reputation - my brother's savior - and no one knew I wanted to kill him. It took the Bulger case for me to remember that I'd seriously wanted to.""Whenever there are children killing children, or perpetrating great acts of violence, there's always this word 'evil' pulled out of the top drawer. Not even the bottom drawer. It's a very quick response. And I'm always struck by it, because from the age of four and a half I have known that it ain't in no drawer. It's at closer hand. Isn't that the triumph of civilisation? That we manage not to be monstrous?""Does one ever feel it," she says, "or is one simply monstrous? I mean, I've been monstrous, I think."