Answer:
The related case was the prominent Morrissey vs. Brewer one, carried out to determine the basis for parole violations, to be "on parole" refers to prisioners who got early released from jail under certain conditions; the liabilities of these procedures can be further consulted in the Robert D. Hanser's book "Essentials of Community Corrections".
The answer is "True", the related Morrissey vs. Brewer case established those rights.