The U.S. Department of Justice announced the formal seizure of over $400 million in assets tied to the Helix darknet cryptocurrency mixer, including cryptocurrency, real estate, and other monetary instruments. This is one of the largest forfeitures ever linked to darknet mixing services.
Helix's Operations and Scope
Court records show Helix was run by Larry Dean Harmon from 2014 to 2017, processing roughly 354,468 bitcoin — valued at over $300 million. The service obscured the origin and destination of funds, working closely with the Grams darknet search engine and major darknet markets, making it a vital channel for illegal proceeds, particularly from drug sales. Harmon earned commissions from the transactions and pleaded guilty to money laundering conspiracy in 2021, receiving a sentence in 2024.
Coordinated Investigation Across Agencies
The investigation involved the IRS Criminal Investigation Cyber Crimes Unit, the FBI's Washington D.C. field office, and the government of Belize (including the Attorney General and police). A. Tysen Duva (Assistant Attorney General), Jeanine Ferris Pirro (U.S. Attorney), Guy Ficco (IRS-CI Chief), and Brett Leatherman (FBI Assistant Director) jointly announced the final seizure. The Justice Department's Computer Crime and Intellectual Property Section (CCIPS) handled the litigation; since 2020, CCIPS has prosecuted over 180 cybercriminals and recovered more than $350 million for victims.
The case demonstrates the growing sophistication of law enforcement in tracing blockchain transactions, even against large-scale mixing operations, leveraging on-chain analysis and international cooperation to intercept assets.