Key Takeaways
- The U.S. government seized over $400 million in assets linked to Helix, a major Bitcoin mixer.
- Larry Dean Harmon, Helix’s Ohio-based operator, pleaded guilty to money laundering conspiracy and was sentenced to 36 months in prison.
- The case, finalized in January 2026, underscores advancements in blockchain tracing and international cooperation to combat crypto-enabled crime networks.
The U.S. Department of Justice announced last week that it obtained legal ownership of more than $400 million in cryptocurrencies, real estate, and other monetary assets tied to Helix, a notorious darknet mixing service.
This represents one of the largest asset recoveries in the history of digital currency enforcement.
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DoJ Seizes $400 Million From Helix
In a major crackdown on cryptocurrency-facilitated crime, the DOJ finalized the forfeiture of over $400 million in assets connected to Helix.
These assets include cryptocurrencies, real estate, and funds previously seized from Larry Dean Harmon, the Ohio-based operator convicted of conspiracy to launder money.
Helix operated as a Bitcoin “mixer” or “tumbler” from 2014 to 2017, blending funds from multiple users to obscure their origins and destinations.
The service was particularly popular among darknet drug dealers and other criminals seeking to launder illicit proceeds.
During its operation, Helix processed approximately 354,468 Bitcoin—valued at around $311 million at the time—through more than 1.2 million transactions.
Much of this Bitcoin came from prominent darknet marketplaces like AlphaBay, where vendors sold narcotics, stolen data, and other contraband.
Investigators traced tens of millions of dollars from drug sales, fraud schemes, child exploitation material, and even extremist groups through Helix’s operations.
Larry Dean Harmon, a 41-year-old Akron, Ohio resident with ties to Belize, founded Helix.
He also developed Grams, a darknet search engine designed to help users locate vendors on hidden marketplaces.
Investigation, Arrest, and Legal Proceedings
Harmon was indicted in February 2020 on charges including conspiracy to commit money laundering and operating an unlicensed money transmitting business.
Authorities arrested him following searches of his Ohio and Belize residences, seizing cryptocurrency storage devices and records documenting millions in assets.
After shutting down Helix in 2017, Harmon ran Coin Ninja, a cryptocurrency exchange featuring a mixing service called DropBit, designed to bypass know-your-customer (KYC) requirements.
In August 2021, Harmon pleaded guilty to conspiracy to commit money laundering, admitting his role in laundering over $300 million in illicit Bitcoin.
He agreed to forfeit assets, including over 4,400 Bitcoin (valued at more than $200 million at the time).
In November 2024, U.S. District Judge Beryl A. Howell sentenced Harmon to 36 months in prison, three years of supervised release, and a forfeiture money judgment.
The Financial Crimes Enforcement Network (FinCEN) separately imposed a $60 million civil penalty for Bank Secrecy Act violations, which remains outstanding.
On Jan. 21, 2026, Judge Howell issued a final order transferring legal ownership of more than $400 million in assets, including cryptocurrencies, real estate, and monetary holdings, to the U.S. government.
International cooperation, including assistance from Belizean authorities, played a critical role in this effort.
The Helix investigation was led by the IRS Criminal Investigation Cyber Crimes Unit and the FBI Washington Field Office, beginning around 2019.
Blockchain analysis tools demonstrated that even mixed transactions could leave traceable patterns over time.
