The reduction of recidivism by state judiciaries utilizing six principles of evidence-based practice (EBP) is explained. Seven sections follow an executive summary: introduction; current state sentencing policies and their consequences; drug courts -- the state judiciary's successful experiment with EBP; the principles of EBP; local sentencing and corrections policy reforms; state sentencing and corrections policy reforms; and conclusion. "[C]arefully targeted rehabilitation and treatment programs can reduce offender recidivism by conservative estimates of 10-20%" (p. 72).