"Psychodynamic theories of criminal behavior focus on development of the psyche in infancy. From this perspective, motivation for criminal behavior is rooted in an individual’s psychodynamic structure and development. Contemporary psychodynamic theories of criminal behavior are rooted in Freud’s theory of the id, ego and superego. Freud postulated that behavior is the product of the interaction of the id, ego, superego with the environment. The id represents the human drive for pleasure, the ego regulates the id in accordance with the demands of the external environment, and the superego reflects the conscience and ego ideal or the parental voice inside one’s head that says “Do the right thing.”"