It means a warrant was issued and the hosting provider surrendered the server to them. I still find it quite appalling that an exchange would operate with the vast majority of its funds on a hot wallet. This is the most souring part. I know eXch gave out free CryptoSteels around here - did they not use any of them?
I might be missing something about the timing, but If everything has been seized and shutdown on the 30th... How come OP edited his original post after the incident and announced the closure as if nothing happened? also how come TRM Labs (see above post) claims that transactions were still being processed even after the shutdown on the 30th (which at the time, they didn't knew was law enforcement).