Well OP has done something already by starting the legal process, so that's already better than many when it comes to fighting evil. And I don't think he should

Well OP has done something already by starting the legal process, so that's already better than many when it comes to fighting evil. And I don't think he should need to feel he has any more duty than anyone else. EDIT: My assumption is that they engaged a lawyer but if not that's obviously my advice #1.