Criminals released from prison on parole have generally been put under routine supervision. A recent program has allowed criminals to leave prison early under intensive supervision; they must obey curfews and in some cases they must be electronically monitored. The percentage of released criminals arrested while under supervision is the same for intensive supervision as for routine supervision
intensive supervision is no more effective than routine supervision in preventing criminals from committing additional crimes.
All of the criminals who were arrested while under routine supervision had been in prison more than once before being paroled and put under supervision.