“paying his debt” is a silly concept. If we had slowly roasted the bastard to death it would not have paid anything.
You cannot pay that debt. There is no going back. The only thing you can do is make his punishment horrific and public so that the next sick freak that wants to rape a little girl will suppress those thoughts.
Rehabilitation? No longer poses a threat?
Sure.
Then why was he released? This is where you fail to understand me. If he has not paid his debt / still poses a threat, he does not belong among us.