What i mean is the announcement, most cases of mixers that was shutdown wasn't publicized (i guess) since i didnt find one. Well, it has a point, and if that's the case, i'll alter what i said.
Depends on how the mixer was shutdown.Voluntary shutdown? - Some times they announce their shutdowns like
coinmixer.se,
Bitmixer.io, BitBlender.io
Exit scam? - They always go quietly, perfect example was
Smartmixer.ioShutdown by authorities? Obviously authorities have to announce about the Seizure and if by any chance they arrest the person behind the mixer, they will proudly announce about his arrest. I don't think they would go quiet on that one.
It also depends on the extent of investigations in each case. It is not in the interest to disclose the achievements of the authorities if this does not serve the progress of the research if the case is still open, especially if there are more than one accused and there are still some of them who have not been arrested yet. In certain cases, the announcement of the arrest of one or more suspects is in the context of the investigations themselves, i.e. to serve one of the objectives of the investigations.
With regard to closed cases, the authorities will certainly proudly announce their victories, and this is their duty anyway to clarify the picture for public opinion.