8 year study analyzed the supervision and outcomes of 359 offenders with mental illness. 52% of traditional probationers were re-arrested over a 2-year follow-up period, compared to only 29% of those in speciality mental heath programs

See the source article by following the link below:
8 year study analyzed the supervision and outcomes of 359 offenders with mental illness. 52% of traditional probationers were re-arrested over a 2-year follow-up period, compared to only 29% of those in speciality mental heath programs