I know human nature, my friend, and I tell you that, suddenly confronted with the possibility of being tried for murder, the most innocent person will lose their head and do the most absurd things.
There is a psychological technique which makes it possible to interpret dreams, and that, if that procedure is employed, every dream reveals itself as a psychical structure which has a meaning and which can be inserted at an assignable point in the mental activities of waking life.
The psychology of character is interesting. One cannot be interested in crime without being interested in psychology. It is not the mere act of killing, it is what lies behind it that appeals to the expert.
The psycho-analysis of neurotic subjects the intimate connection between bed-wetting and the character trait of ambition.