Somehow, Nate Cain’s name got out as a whistleblower in the Clinton Foundation ^investigation^ (key word, here).
Once that started to go “viral” among derps, DOJ (Huber/Whitaker/Sessions) put together a search warrant to get the documents and preserve them for the ^investigation^.
Up-shot is that Cain’s property was in danger of being “tossed” and, if he was at home at the time the derps invaded, his physical safety was at risk.
Derps may have been able to arrange a SWAT or...in the case of Cohen, arrange a convenient fire to gain access.
As I said later in the thread, DOJ has his 6.