That hasn’t got a hope in hell of working with the majority of prisoners, because most are habitual, and I presume you are talking about murderers, for god’s sake get real, apart from a minute percent you could never trust them again however many credits they had. The murderers lost all credibility when they carried out their heinous crimes, they are there to be punished, and that is only because they escaped the death penalty.
Regards ian 2411