On the day I was arrested at my client's office in front of my client and all my co-workers they did not have to tell me why I was being arrested - sealed arrest warrant.
That same day they searched our house and did not have to tell us what they were looking for - sealed search warrant.
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Thank you very much for posting this. Should give food for thought for everyone regarding what the threat model we need to be safe against actually is. Plausible deniability is one of the things that come to mind.