Psychopath. The word alone evokes powerful emotions and images. Attaching that label to a juvenile offender is a serious charge, and should be done so with caution, especially given that the standard assessment tools for psychopathy were originally developed for adults, not juveniles. As the MacArthur Research Network on Adolescent Development and Juvenile Justice has shown, and as the U.S. juvenile justice system recognizes, adolescent offenders are different from adults in important ways. Therefore, simply applying adult measures of psychopathy to juveniles may overlook important aspects of their developmental stage. Gaining a better understanding of juvenile psychopathy is imperative given that judges are facing increasing pressures from burgeoning caseloads and shifting public policies to waive juveniles to adult courts. In making their determinations of whether youth should be tried as adults, judges often consider potential for future violence and amenability to treatment in the juvenile system. To help them in their decision-making, judges often rely on the results of psychological assessments. For adults suspected of psychopathic tendencies, the most highly regarded assessment tool is Hare’s Revised Psychopathy Checklist (PCL-R). Given its effectiveness in predicting tendencies toward future violence, the PCL-R has been adapted, with only slight modifications, for youth.