The present study provides preliminary data concerning the efficacy of the Adolescent Drug Abuse Prevention and Treatment (ADAPT) Program, a collaborative effort involving mental health and law enforcement. ADAPT is a multi-component, cognitive-behavioral outpatient intervention serving children and youth referred directly from local police agencies. It was expected that adolescents who participated in the program would demonstrate reduced rates of substance use or abuse, recidivism, and truancy. It was also anticipated that academic performance would improve. Three hundred and three adolescents successfully completed the ADAPT Program. Results indicated improvements in all of the above mentioned areas. Clinical implications of the findings are discussed; suggestions for directions future research might take are offered.