Federal prosecutors are leaning on a ruling from the Bitcoin Fog case to argue that Roman Storm's attempt to move his trial out of the Southern District of New York should fail. Storm, the founder of crypto mixer Tornado Cash, is fighting the government's venue argument. The comparison to Bitcoin Fog, another mixing service prosecution, gives prosecutors a precedent they can point to as they try to keep the case where it is.
Storm didn't stay quiet. In a post on X, he pushed back on the government's reasoning, noting that FinCEN once withdrew a proposed rule targeting mixers after concerns it could chill legitimate activity. The implication is hard to miss: regulators themselves backed off from treating mixers as inherently suspect, so why should a criminal court treat his venue challenge differently?
The Bitcoin Fog precedent
Bitcoin Fog was a long-running mixing service, and its prosecution produced a ruling that prosecutors now say undercuts Storm's venue argument. The details of that ruling aren't spelled out in the government's filing as summarized here, but the move is a familiar one — when the Justice Department finds a precedent in a related crypto case, it uses it. Bitcoin Fog and Tornado Cash are different operations with different fact patterns, which is exactly the kind of distinction Storm's defense would normally press. Prosecutors are betting the venue question turns on something narrower than the technical differences between the two services.
Storm's response on X
Storm's tweet did two things at once. It rejected the prosecutors' framing directly, and it reached for a regulatory data point that cuts against the government's posture. FinCEN's decision to withdraw a proposed mixer rule — made after concerns that the rule could discourage legitimate activity — is a real event, and Storm is using it to argue that the official stance toward mixers has never been as clear-cut as prosecutors want the court to believe. It's a defense-side move that tries to turn the government's own hesitancy into evidence.
Whether a tweet moves a judge is another matter. Venue fights are usually won on legal briefing, not public argument, and prosecutors rarely respond to social media posts from defendants. But Storm's post gives his supporters a clear version of his argument and keeps pressure on the government's narrative while the motions are pending.
Why venue matters so much
For Storm, the venue question isn't procedural housekeeping. Where the case is heard shapes the jury pool, the judge, and the broader legal environment. Prosecutors want the case to stay in the Southern District of New York, a jurisdiction with experience in crypto cases and, from the government's perspective, a favorable track record. Storm's team wants it moved. The Bitcoin Fog ruling is prosecutors' attempt to close off that path.
There's a larger dynamic at play too. Tornado Cash has been at the center of a running argument over whether developers can be held criminally liable for how their code is used. That argument has played out in sanctions policy, in Treasury guidance, and now in the courtroom. The FinCEN episode Storm cites is part of that same back-and-forth — a moment when regulators pulled back from a rule that could have swept in legitimate users alongside bad actors.
The venue dispute now sits with the court, and the Bitcoin Fog citation is on the record. Storm's public response won't decide the motion, but it signals that his side intends to fight the government's framing at every step. The next concrete development will be the court's ruling on the venue challenge, or any further briefing the parties file before then. Until that lands, the case stays in the Southern District, and prosecutors keep the precedent they came in with.
