Judicial System Paper

Mini Paper 3
OK, I've changed, ...honest. Now let me go home!
It is clear to me that an inmate who leaves prison with the same education, 
the same job skills, the same employability rating, the same social circle, 
the same decisions making processes, the same personal / spiritual values, 
etc. They had before they were incarcerated will re-offend; that is, will
commit another crime once they are released from the confines of the 
institution. In that case, what should happen to the inmate who hasn't 
"changed" by the end of their criminal sentence?
Some say leave him in prison...which is a little troublesome because the 
Constitution says he can't be deprived of liberty without due process of law 
and he has already served his sentence for the crime he committed. Some say he 
has to be released (see above)....which seems wrong since we know that he is 
likely to commit another crime, which means another victim's loss, pain, 
suffering or maybe death. Isn't the criminal justice system responsible for
protecting the community from such predators.
What about the other side? What should happen to an offender who clearly and 
convincingly has changed, and still has a significant amount of time on his 
sentence. Should that individual be kept behind bars at the expense of the 
taxpayers, under state care, custody and control, until at least he is 
eligible for parole; or should he be released.