He should spend 15 years breaking rocks (with his face), interrupted by daily gang-rapes, and then “released” in the care of the victim’s father (in restraints, tied to a rope fastened to the back of a pickup truck).
In all seriousness, people like this should be sold as slaves, and the proceeds given to their victims. Let somebody chain them up and force them to work at some horrible tasks for the rest of their lives. This would make them worth a decent amount of money to buyers, so that the victims would get a decent sum.