U.S. Seizes Over $400 Million in Crypto and Assets Linked to Helix Darknet Bitcoin Mixer

The U.S. Department of Justice has officially taken ownership of more than $400 million worth of cryptocurrency, cash, and property connected to Helix, a Bitcoin “mixer” that played a major role in helping darknet drug markets hide illicit funds.

The assets—ranging from digital currency to real estate—were previously seized from Helix’s operator. A final forfeiture order issued on January 21, 2026, transferred legal ownership of those assets to the U.S. government, closing the loop on a case that has been years in the making.

Background on Helix

Helix operated between 2014 and 2017 as a cryptocurrency “tumbling” service, designed to mix users’ Bitcoin together to make transactions harder to trace. While such services can be used for privacy, prosecutors say Helix became a go-to tool for drug traffickers and other criminals looking to launder money from darknet marketplaces.

According to court records, Helix processed at least 354,468 Bitcoin, worth roughly $300 million at the time. It also offered direct technical integrations with darknet markets, making it especially easy for illegal proceeds to be funneled through the service and obscured.

The Operator and Legal Outcome

Helix was run by Larry Dean Harmon, who pleaded guilty in August 2021 to conspiracy to commit money laundering. In November 2024, he was sentenced to 36 months in prison, followed by three years of supervised release, and agreed to forfeit assets tied to the operation.

The latest court order cements the government’s legal claim over those seized assets, formally bringing the forfeiture process to an end.

Why It Matters

This case ranks among the largest crypto-related asset forfeitures linked to darknet crime in U.S. history. It shows how law enforcement can still trace, seize, and reclaim digital assets years after an illegal service shuts down.

It also sends a clear signal to the crypto world: privacy tools that cross into facilitating crime will continue to face intense legal and regulatory scrutiny, even long after their operators are caught.