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HomeCRIME & PUNISHMENTCYBERCRIMELarry Dean Harmon, Operator of Helix Darknet Cryptocurrency 'Mixer', Sentenced in Money...

Larry Dean Harmon, Operator of Helix Darknet Cryptocurrency ‘Mixer’, Sentenced in Money Laundering Conspiracy, to Forfeit Over $400m in Assets

An Ohio man was sentenced today to three years in prison for his operation of the darknet cryptocurrency “mixer” Helix, which processed transactions involving over $300 million worth of cryptocurrency from 2014 to 2017.

According to court documents, Larry Dean Harmon, 41, of Akron, ran Helix, a darknet mixer that laundered customers’ bitcoin.

Helix was connected to Grams, a darknet search engine also run by Harmon. Helix was one of the most popular mixing services on the darknet and was highly sought after by online drug dealers who needed to launder their illicit proceeds.

Helix processed at least approximately 354,468 bitcoin — the equivalent of approximately $311,145,854 in U.S. dollars at the time of the transactions — on behalf of its customers, including customers in the District of Columbia.

Much of those funds were coming from or going to darknet drug markets. Harmon retained a percentage of these transactions as his commissions and fees for operating Helix.

Harmon worked to ensure Grams and Helix connected to or otherwise supported all of the major darknet markets at the time. Harmon developed an Application Program Interface (API) to allow darknet markets to integrate Helix directly into their bitcoin withdrawal systems.

Harmon also customised features of Helix to ensure compatibility with significant markets. Investigators traced tens of millions of dollars from darknet markets to Helix.

On August 18, 2021, Harmon pleaded guilty to conspiracy to commit money laundering.

In addition to his term in prison, Harmon was sentenced to three years of supervised release, a forfeiture money judgment in the amount of $311,145,854, and forfeiture of seized cryptocurrencies, real estate, and monetary assets valued at over $400 million.

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