Child Conduct problems (CP), as found in Conduct Disorder (CD) and Oppositional Defiant Disorder (ODD), are common and chronic. Although laboratory research studies have yielded promising initial outcomes, follow-up effects are often not studied and, when they are evaluated, are often limited. Maintenance procedures have been generally administered after acute treatment in the form of periodic booster sessions to enhance long-term outcomes (Whisman, 1990). Although the conceptualization and application of maintenance therapies has been described frequently with adults, there is limited information regarding the role of maintenance treatment in child and adolescent psychotherapy (see Eyeberg, 1998). A few studies of booster treatments have reported the return of behavioral improvements (Baer, Williams, Osnes, & Stokes, 1984; McDonald & Budd, 1983; Patterson, 1974) and other improvements in conduct-disordered children (Lochman, 1992) and depressed adolescents (Clark et al., 1999), suggesting potential benefits in extending the durability of treatment effects. What is not yet known is the extent to which patients respond positively to a booster (maintenance) treatment condition that is administered after long-term (i.e., three-year) follow-up, one that is designed to reduce recurrence of behavioral dysfunction and the development of new forms of dysfunction during adolescence. The justification for this additional intervention derives from our initial findings and the young age of our sample, which, in most instances, has yet to traverse the period of heightened risk for delinquency.