US DOJ Takes Legal Ownership of $400 Million Linked to the Infamous Bitcoin Mixer Helix

The US Department of Justice has seized more than $400 million in cryptocurrency, cash and real estate linked to the Helix Bitcoin Mixer.

The US Department of Justice (DOJ) has officially seized more than $400 million worth of cryptocurrencies, real estate and cash linked to the Helix Bitcoin Mixer.

The forfeiture was completed in late January 2026, ending a years-long lawsuit against Helix’s operator, Larry Dean Harmon.

Helix’s illegal activity and Harmon’s case

Helix, which operated from 2014 to 2017, was marketed as a tumbling service designed to anonymize Bitcoin transactions. Investigators found that it had become a major hub for money laundering linked to drug trafficking, hacking and other illegal activities. Court records show that Helix processed more than 354,468 Bitcoin, valued at around $300 million at the time, for its users.

Harmon, who also created the darknet search engine Grams, enabled the platform to integrate directly with major darknet markets. The Application Programming Interface (API) allowed them to connect the service to their Bitcoin withdrawal systems, earning a percentage of each transaction as commission and fees. Researchers have also traced tens of millions of dollars in illicit proceeds from various darknet markets through the mixing service.

The Ohio-based operator of Helix was first charged in 2020 with money laundering and operating an unlicensed money transmission business. In August 2021, he pleaded guilty to conspiracy to commit money laundering and was sentenced in November 2024 to 36 months in prison, three years of supervised release, a judgment of forfeiture of money and seized assets.

On January 21, 2026, Judge Beryl A. Howell of the U.S. District Court for the District of Columbia issued a final forfeiture order, officially transferring the assets to the government.

Regulators are simplifying action against crypto mixers

The Helix case is part of a broader regulatory crackdown on cryptocurrency mixers and privacy tools. Platforms such as Tornado Cash have also faced sanctions and enforcement actions in recent years. While crypto advocates argue that these services can provide legitimate privacy protections, authorities continue to focus on their potential use in criminal activity.

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In a related development, Michael Lewellen, blockchain entrepreneur and Coin Center fellow, filed a lawsuit against the DOJ last year, seeking a ruling that his non-custodial crypto crowdfunding platform, Pharos, does not violate money transmission laws. The legal action argues that software developers who create non-custodial privacy tools are unfairly targeted.

The Justice Department later announced that it would no longer pursue criminal cases against crypto exchanges, developers or users for regulatory violations. This development follows the dissolution of the National Cryptocurrency Enforcement Team (NCET), the specialized unit responsible for investigating crypto-related criminal activity.