This proposal is in response to RFA-DA-04-008, Group Treatment for Individuals in Drug Abuse or Alcoholism Treatment. Of particular interest to the agencies are group therapies for Conduct Disordered adolescents, reducing the spread of infectious disease, and mechanisms of action. This proposal targets these areas of interest. This study will focus on treating substance abusing incarcerated teens using 2 individually administered Motivational Interviewing (MI) sessions followed by 10 group sessions of Cognitive Behavior Therapy (CBT). MI is conceptualized as preparation for group CBT. The control group receives individualized Relaxation Training (RT) followed by group Treatment as Usual (TU). Currently, there is little research regarding effective group treatments for incarcerated teens and this study will address this gap in our knowledge base.