If it was me I would give his money back to this guy (with proofs) :
This is in the dox section that is not available via google.
here is the bitcointalk version of the thread
Ok so it looks like this motherfucker owes me 3.25btc. 3btc I deposited to nextponzi and before I got it back the site was gone and 0.25btc I deposited to bit-dividends. How do I claim my money back? I have my old wallet ready with proof of transactions. Who should I contact?
For now i can only advise you to follow the scam accusation, and we will know how it will end, and what about the money locked by Alex.
And then half of the money back and the other half to charity.
This guy is a serial scammer. He is part of what makes BTC so toxic. Let's do some good with his money.
Refunding the gy with proof of been scamed is legit, but you can't donate the funds as long as there is a justice procedure ongoing, so it is up to Alex to decide what to do.
I totally agree with you about what makes bitcoin toxic, people like this guy should be banned from all the bitcoin related websites/forums/platforms.
Oh and, even for the refund, if there is a justice procedure, the funds shall not be moved.