This is a very complex process almost like they are mixing the money. And in reality this is how money laundery works I even believe that they are sophisticated and almost undetectable ways not how yet to be discovered in this type of fraud.
What I like most about this types of stories is that they will always end up getting caught. It may not happen immediately but it does sooner or later. Criminals cannot win.
All this approach applied by the criminals are absolutely a delay tactics unfortunately, they were being tracked and got caught. I am just hearing this kind of story for the first time where fiat undergo a mixing processes and then converted to crypto, this is dramatic, the criminal could not win and i commend the great effort of the investigating team.