Comment by jacquesm

I highly doubt it is that simple for LE to enter a DC without a warrant signed by a judge, but insiders have all of that access and plants in DCs can and do happen.

I was present when Dutch LE seized a bunch of servers on behalf of an FBI liaison officer in NL and everything went 'by the book', there is no way an LE officer without a signed order from a judge would have been granted access.