Remember that when a person breaks the law, it's not only an offense against the victim but also against the authority that created the law. Meaning you have very little influence over what the justice system does once you report him.
So I think it's a matter if letting go and tempering that whatever the consequences, HE put himself in the position he's in through HIS actions. Of course, HE won't see it that way because to him, it will all be your fault, right?