The exchange said that they are working closely with other exchanges - in order to prevent the dumping of coins on an exchange.
I dont know how much they can work with mixers. Most of them remain off the grid and dont get known till FBI cracks on them. Torando cash owners are publicly known on wikipedia.
The guy called Roman Semenov already has a nice FBI page on his name:
https://www.fbi.gov/wanted/wcc/roman-semenov/download.pdfConnection to the Lazarus group. What else do you need to get a recipe for disaster?
Sadly those who lost their money, are probably never getting it back and this is the hard truth about money being stored in exchange wallets. They have been prime hacking targets since a long time.