~snip~
We can only speculate, but CM has also left $47 million in addition to the 7 TB of data. So far, I haven't heard of Minh Nguyen arrested. This is like a replay, although not involving a mixer anymore but only one that's mislabeled as such.
Recently, in the topic about mixers in the Meta board, someone confirmed that the person you mention is still at large - and as we can see, there are definitely some similarities between the two cases. Besides, those who launched an attack on eXch know who is behind the project - at least those who sent them a warning, right?