The U.S. Department of Justice has seized more than $400 million in cryptocurrency, real estate, and currency assets connected to the Helix darknet mixing service. Helix operator Larry Dean Harmon pleaded guilty to money laundering conspiracy in August 2021 and was sentenced in November 2024 to 36 months in prison, followed by three years of supervised release and asset forfeiture. Helix processed over $300 million in crypto transactions from 2014 to 2017. The final forfeiture order was issued by Judge Beryl A. Howell of the District of Columbia on January 21.