The United States Department of Justice has finalized the forfeiture of more than $400 million in cryptocurrency and other assets connected to Helix, an early Bitcoin-era darknet mixing service, according to a statement released Thursday.
The assets were seized from Larry Harmon, the operator of Helix, which facilitated Bitcoin transactions between 2014 and 2017. The mixer was designed to obscure the origin and destination of Bitcoin, primarily serving users linked to darknet marketplaces.
The forfeiture follows a Jan. 21 order from the US District Court for the District of Columbia, which formally transferred ownership of the seized assets to the federal government. The final court ruling grants the government legal title to the digital assets, real estate, and financial holdings associated with Helix’s operations.
The move marks the conclusion of one of the most significant early prosecutions involving a Bitcoin mixing service. The case highlights how large-scale crypto enforcement actions can take years to fully resolve, even long after the underlying criminal activity has ended.
Helix processed hundreds of thousands of Bitcoin
According to the DOJ, Helix processed at least 354,468 Bitcoin during its years of operation, valued at roughly $300 million at the time. Prosecutors tied much of this activity to darknet drug markets attempting to launder illicit proceeds.
Harmon also ran Grams, a search engine created to support major darknet marketplaces active during that period. Investigators said Helix’s application programming interface allowed marketplaces to integrate the mixer directly into their Bitcoin withdrawal systems, enabling large-scale money laundering.
Authorities reported tracing tens of millions of dollars from darknet markets directly to Helix.
Forfeiture finalized years after sentencing
Harmon was arrested in February 2020 and pleaded guilty in August 2021 to conspiracy to commit money laundering. In November 2024, he was sentenced to three years in prison and ordered to forfeit assets worth more than $400 million.
Last week’s court order finalized the forfeiture, officially transferring ownership of the assets to the US government. As previously reported by Cointelegraph, Harmon’s sentence was reduced after he cooperated with investigators, including providing testimony in the Bitcoin Fog case against Roman Sterlingov.
