Conduct disorder is a psychiatric category marked by a pattern of repetitive behavior wherein the rights of others or social norms are violated. Symptoms include verbal and physical aggression, cruel behavior toward people and pets, destructive behavior,lying, truancy, vandalism, and stealing. Conduct disorder is a major public health problem because youth with conduct disorder not only inflict serious physical and psychological harm on others, but they are at greatly increased risk for incarceration, injury,depression, substance abuse, and death by homicide and suicide. After the age of 18, a conduct disorder may develop into antisocial personality disorder, which is related to psychopathy. Depressive conduct disorder is a combination of Conduct disorder with persistent and marked depression of mood with symptoms such as loss of interest, hopelessness, disturbances in sleep patterns and altered appetite.