The first playwright to use the plot of a man searching for the culprit of a terrible crime, only to discover he is searching for himself was Sophocles and the play was Oedipus. He does not know that the man he was trying to hunt, a man who had killed his father and married his own mother, was himself. He had been set aside from his parents at a very early age, so he knew none of them. That is why he could not have known that the man he had killed was his father and that the woman he married to was his mother.
