The Youth Level of Service/Case Management Inventory (YLS/CMI) is a structured assessment tool designed to facilitate the effective intervention and rehabilitation of juvenile offenders by assessing each youth's risk level and criminogenic needs. The present study examined the YLS/ CMI's reliability and validity in a sample of 107 juvenile offenders who were court-referred for mental health assessments. Results demonstrated the YLS/CMI's internal consistency and interrater reliability. Moreover, the instrument's predictive validity was substantiated on a number of recidivism measures for both males and females. Limitations of the current findings are discussed.A ccording to Andrews, Bonta, and Hoge (1990), effective offender rehabilitation requires the appropriate classification of an individual's criminogenic risk level and needs. The assessment of risk is important for making informed decisions about levels of super-329 Schmidt et al. / RELIABILITY AND VALIDITY OF YLS/CMI