Except the communications were going through TOR in his house. If police traced the packets exiting from him, that means they already got the public IP server the porn was sent from or to, but it passed through his computer as the visible endpoint.
That meant it either proceeded elsewhere on the TOR network or stayed on his machine, and they had no external way of knowing without checking his hard drives.
That meant it either proceeded elsewhere on the TOR network or stayed on his machine, and they had no external way of knowing without checking his hard drives.