Just goes to show that it doesn't work. Meanwhile plenty of criminals who wont go straight carry guns.
If you insist on parole, then a felon like set of restrictions should be in place for the duration of their original sentence. Once that's up, they are regular citizens again.
Just my opinion, don't think once you complete your sentence you should be forever left crawling in the mud unless you go back to crime, then a hammer comes down hard.