We all read the news about the owner of btc e being arrested. As stated in the articles the exchange is responsible for 4 billion of Dollars in money laundering transactions.
How on earth is it possible that the key owner of that exchange can remain anonymous for all that time?
It is impossible to know exactly how he did it, but if you combine TOR, bitcoin, bitcoin mixers and fake identities then someone can become really difficult to catch, the only one that can perform such a feat is a government with strong intelligence like the US.