The goal of this study was to evaluate the effectiveness of a mental health intervention for youthful offenders, specifically the Special Needs Diversionary Program (SNDP) by comparing the treatment group with the control group. The sample consisted of 328 mentally ill youths: 168 youths participated in the SNDP and 160 youths in other court-ordered programs. To examine the empirical relationships among the covariates, the current study uses a two-step approach: (a) logistic regression; and (b) Cox Proportional-Hazards Regression. The findings reveal that participation in the SNDP was strongly associated with reduced recidivism compared with nonparticipation in the SNDP among mentally ill youthful offenders throughout the 12-month follow-up. Study limitations and implications for future research are discussed.