Imagine that police got a tip from some clearinghouse about contraband someone else claimed to have received via FedEx delivery of a sealed container, so they convinced a judge to authorize them to go into the FedEx depot to search for and seize any delivery vehicle, shipping carton, shipping label, or related documentation in sight. That's roughly what happened here, but worse, the Tor exit relay operator could not trace backward from the package they delivered to the person from whom it originated, and the police knew it.
Sure, the package could have been injected by somebody at the FedEx depot, but there is no evidence of such, and thus no cause for search.
Sure, the package could have been injected by somebody at the FedEx depot, but there is no evidence of such, and thus no cause for search.