" The prime marks of the murderer are a sense of helplessness, impotence, and nagging revenge carried over from early childhood. Intertwined with this core of emotions which color and distort his view of life and all his actions are his irrational hatred for others, his suspiciousness, and his hypersensitivity to injustices or rejection. Hand in hand with these go his self-centeredness and his inability to withstand frustration. Overpowered by frequent uncontrollable emotional outbursts, he has a need to retaliate, to destroy, to tear down by killing. "

― ,