then make it public once the refund is done. Making this information public can in no way harm you. Why are you so averse to doing it? He's a criminal, and doesn't deserve your protection. Any of the criminals involved in this should already know: returning the funds doesn't mean this is over. This isn't over until justice has been served.

...so there's no reason to not trust and co-operate with me when I can deliver my promise of the $100K and 20,000 BTC.