They did, and then they used something called parallel construction (legal term) to not give away the warrantless search that entails. Wanted to avoid fruit of the poison tree, or public backlash, or maybe even both.
Once he was identified, they trolled through his internet history to find something that if they were luckier than any investigators ever they might have found without cheating. Then claimed they actually did that. It was all horseshit. None of this is controversial. Didn't even have to hack Tor, traffic analysis sufficed.
Once he was identified, they trolled through his internet history to find something that if they were luckier than any investigators ever they might have found without cheating. Then claimed they actually did that. It was all horseshit. None of this is controversial. Didn't even have to hack Tor, traffic analysis sufficed.