Unless he has assets I wouldn't bother. Been there. All they do is file bankruptcy, you end up spending more money on a bankruptcy attorney to protect your judgement than you end up collecting.
Unless there are punitive damages the judgement will be discharged. Even if there are punitive damages you may have to go to trial in bankruptcy court to substantiate the punitive damages.
Bankruptcy laws have changed somewhat since I had a judgement against someone who filed bankruptcy but I imagine it's still basically the same.
Then you have the trustee. He hires himself as the attorney and his goal is to try and get al the money that he collects through attorney fees. It's a very frustrating system, if you are the creditor.