OP, no offense, but you should stop reading third-rate news portals that produce clickbait headlines, and their whole story boils down to mere speculation involving some kind of blockchain-spying company. Does it even matter through which mixer those funds went through (if they did at all), and who says they didn't use some other mixer as well?
First, I believe that the appropriate board for this topic is not Reputation, but Service Discussion.
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The OP (as well as some others) obviously think that topics like this are appropriate for the Reputation board, although it would be more appropriate to post them elsewhere. Insinuations that some mixer laundered funds from this or that hack are completely meaningless, especially if we know that no mixer has a blacklist and does not limit coins that may come from suspicious sources or are connected to illegal activities.