I wonder if this guy was surprised to see this traced back to him so quickly. There is something else different compared to 2014. Looks like tracing become so good that any significant amount of crypto moved is automatically analyzed. I have my doubts that privacy coins are really... private to the "right" eyes.
I think they've must've somehow traced his wallet. Since Blockchains are like open ledgers, I guess they just had to attach or identity which wallets were his. There's always one geeky tech bro that can always do this for the government