Well, assuming they had a warrant for the seizure in the first place, fine and good that they did their job looking for the bad guys. But I don't think a judge would have given them a warrant to break in and return the server unless they thought no one had noticed it was gone. Why did they not just call the owner and say they wanted to return the server. Were they trying to be nice by returning it to its rightful place. How did they get in to return it? Has this place no security? Did they bully some pimply faced security guard into opening the door? Did the guard have authority to grant them access to the cage? No legal access means trespassing; the feds are not above laws on criminal trespass.