FinCEN fines a Bitcoin mixer operator a $60 million civil money penalty

From 2014 through 2017, Harmon routed more than $300 million in Bitcoin belonging to AlphaBay darknet users through his services. Over 1 million transactions moved through the system. Investigators documented roughly 356,000 separate transactions via Helix during this period.

Harmon ran Helix without registering as a money services business. FinCEN's investigation exposed systematic failures to meet compliance requirements. "The investigation demonstrated that Mr. Harmon deliberately disregarded his obligations under the [Bank Secrecy Act] BSA and implemented practices that allowed Helix to circumvent the BSA's requirements. This included a failure to collect and verify customer names, addresses and other identifiers on over 1.2 million transactions," the agency said. He kept no transaction records and established no anti-money laundering controls. He purged customer information he had gathered, including data tied to criminals and drug traffickers.

Bitcoin mixers combine coins from different users to hide transaction origins. US law enforcement has treated this anonymity with suspicion, viewing mixers as tools for crime when criminals use them. Exchanges block accounts linked to mixer activity, signaling industry consensus on the practice.

Harmon's case comes as federal authorities strengthen oversight of cryptocurrency infrastructure. Government agencies have issued repeated warnings to companies handling encrypted assets about compliance. The Internal Revenue Service announced a $625,000 reward for anyone who could crack privacy coins like Monero or reveal Lightning Network transactions. Federal law enforcement has started offering bounties to software developers and fintech professionals to help investigate cryptocurrency-related crimes.