The U.S. government has taken full legal ownership of more than $400 million in seized cryptocurrencies, cash, and real estate related to Helix, once one of the most widely used Bitcoin mixing services on the darknet.
A federal judge in Washington, D.C., issued a final forfeiture order transferring assets to the government on January 21 following the conviction of Helix operator Larry Dean Harmon. Forfeitures include thousands of bitcoins, hundreds of thousands of dollars in cash, and an Ohio mansion purchased at the height of Helix’s business.
Helix acted as a cryptocurrency mixer, pooling and rerouting Bitcoin transactions to obscure their source and destination.
Prosecutors allege that the service was built to serve the darknet drug market and was integrated directly into the withdrawal system through an application programming interface.
According to court records, Helix processed approximately 354,468 bitcoins between 2014 and 2017, worth about $300 million at the time. Investigators tracked tens of millions of dollars from major darknet markets through the service. Harmon received a portion of each transaction as a management fee.
Harmon pleaded guilty in August 2021 to conspiracy to commit money laundering. After years of delays, he was sentenced to three years in prison in November 2024, followed by supervised release. He was also ordered to forfeit the seized assets and pay the seizure money.
Authorities said Helix worked with Grams, a darknet search engine that Harmon also operated, to help users find illegal markets. Together, these services formed part of the financial infrastructure supporting the darknet drug trade at the time.
Cash, an Ohio mansion, and millions of dollars in Bitcoin
The forfeited assets include a 4,099-square-foot home in Akron, Ohio, that the Harmons bought in 2016 for $680,000. According to a report from Realtor.com, the current value based on automated estimates is between $780,000 and $950,000.
This property sits on 1.21 acres and includes multiple fireplaces, a backyard fire pit, and a Jacuzzi tub. The home will be auctioned by the Internal Revenue Service, federal officials said.
In addition to the property, prosecutors reportedly seized more than $325,000 in cash and approximately 4,500 Bitcoin, which would be worth approximately $355 million in current prices, according to Realtor.com.
“This case shows that the darknet is not a safe haven for criminal activity,” U.S. Attorney Jeanine Pirro said in a statement, adding that law enforcement will continue to pursue cyber-based financial crimes.
Harmon was reportedly released from prison in December 2025 through an early release program after completing drug rehabilitation.
He said he plans to restart his legal Bitcoin education business and is looking for a new home following the confiscation.
