He needs to suffer more and more. If he cannot be punished with the prison system, then everything that can be taken from him, his life aside, should be taken from him.
As he fattens, let him watch his little wanker shrink and shrink.
Let him watch as nobody with half a brain cell wants to date him.
Let him see the world direct all of its hate toward him.
And then, at the end, let him fail to commit suicide, and be paralyzed from the waist down.