If the fact will not fit the theory - let the theory go - Agatha Christie

Murder, you see, is an amateur crime... One feels, very often, as though these nice ordinary chaps, had been overtaken, as it were, by murder, almost accidentally. They've been in a tight place, or they've wanted something very badly, money or a woman - and they've killed to get it. The brake that operates with most of us doesn't operate with them... They continue to be aware that murder is wrong, but they do not feel it. I don't think, in my experience, that any murderer has really felt remorse... Murderers are set apart, they are 'different' - murder is wrong - but not for them - for them it is necessary - the victim has 'asked for it,' it was 'the only way.

It is the quietest and meekest people who are often capable of the most sudden and unexpected violence for the reason that when their control does snap, it goes entirely.

“It’s so dreadfully easy — killing people… And you begin to feel that it doesn’t matter… That it’s only you that matters! It’s dangerous — that.”