A two-dimensional instrument to screen egocentric and unemotional traits in children was tested in this study, and the associations with the aggressive and the antisocial symptoms of conduct disorder were determined. To this end the narcissistic-egocentric and callous-unemotional characteristics associated with psychopathy were, along with the symptoms of conduct disorder, rated by teachers in a general community sample of 1179 four-to-eighteen-year-old Dutch children, and by professional care takers in a sample of 145 twelve-to eighteen-year-old incarcerated adolescents. Confirmatory factor analysis showed that the ratings of the psychopathic characteristics indeed clustered into a dimension with egocentric characteristics and a dimension with unemotional characteristics. Both dimensions were reliable and stable across age and gender groups. In both samples aggressive behavior was primarily linked to the interaction of egocentric and unemotional characteristics, while antisocial behavior was primarily linked to egocentric characteristics only. The incarcerated adolescents showed substantially more characteristics on both psychopathic dimensions than a comparable age and gender matched group with adolescents from the general community sample. The discrimination between normal and incarcerated adolescent youngsters and the linkage with aggressive behavior suggests the existence of a subtype of conduct disordered children displaying narcissism, deficient affect and disruptive social problem behavior.