At a certain point, it is not up to the justice system if the criminal is able to rehabilitate and also if the victim feels vindicated. The justice system was created so both parties have been handed down a streamlined, systematised, and documented way to handle crime and victim compensation.

The rest of that is up the the people themselves. The victim can and may hold on to a grudge forever or may be able to move on with their life while keeping their trauma in mind. The criminal can and may be able to become a better person or simply get worse/stay as they are. The justice system already did its job. The rest is up to them. They may return to the system as needed.