You should call the local police office ahead of time and tell them you're going to operate an exit node. Then literally label everything so that when they come in the future, they know what to take. Like I said, its best to literally have this project in its own room. Like a closet. So its very clear which equipment is used for your exit node.

Again, the Tor Project provides boilerplate letters for these things. Law enforcement usually thanks you. Remember, they use Tor too. Of course, most officers are dumb, but at least someone in their office should know about Tor at this point.