Community sentences are more effective at rehabilitation. For example, only 34% reoofend within 12 months of starting their sentence, compared to 64% among those serving sentences of less than 12 months. Those who reoffend might do so due to:1. Inadequate support for complex needs -often too few places on specialist programmes to addres those (e.g. drug addiction treatment, anger managment).2. Inadequite supervision by probation services -probation has been too lax allowing offenders to miss appointments.3. Failures by CRCs -have been failing to meet their targets.