On 29 January 2026, the US DOJ announced the completion of a forfeiture exceeding USD 400 million in seized cryptocurrencies, real estate and monetary assets. These assets were tied to the operation of Helix, a darknet cryptocurrency mixing service.
Judge Beryl A. Howell of the United States District Court for the District of Columbia entered the final order of forfeiture on 21 January 2026. The order declared the assets forfeited to the United States government.
Helix operated from 2014 to 2017 as a Bitcoin tumbling service. It blended cryptocurrency from multiple users and routed funds through a series of transactions. The service was designed to obscure the sources, destinations and ownership of funds. Helix processed at least 354,468 Bitcoin, valued at approximately USD 300 million at the time of transactions. Investigators traced tens of millions of dollars from darknet marketplaces through the mixer.
Larry Dean Harmon of Akron, Ohio, operated Helix. He also ran Grams, a darknet search engine. Harmon pleaded guilty in August 2021 to conspiracy to commit money laundering. He was sentenced in November 2024 to 36 months in prison, three years of supervised release, a forfeiture money judgement and forfeiture of seized property.
Helix integrated its Application Programming Interface (API) directly with major darknet marketplaces. This enabled seamless Bitcoin withdrawal through the mixer from illegal drug markets.
The IRS Criminal Investigation (IRS CI) Cyber Crimes Unit and FBI Washington Field Office investigated the case. The US DOJ Office of International Affairs and the United States Attorney’s Office for the Northern District of Ohio provided assistance.
Compliance Considerations on Cryptocurrency Mixers and Privacy Tools
The Helix forfeiture is one of the largest asset recoveries connected to a cryptocurrency mixing service globally, specifically against mixing platforms that fail to implement AML and KYC controls. The case sets a precedent for regulatory treatment of privacy enhancing crypto tools. It signals that platforms designed to obscure transaction trails face criminal liability irrespective of when the illicit activity took place. Since 2020, the US DOJ Criminal Division’s Computer Crime and Intellectual Property Section (CCIPS) has secured over 180 cybercrime convictions and court orders returning more than USD 350 million to victims. The forfeiture demonstrates that blockchain forensics and international cooperation can trace and recover crypto assets years after the underlying offences.
