U.S. charges Helix operator Larry Harmon over Bitcoin mixing service
U.S. prosecutors charged Larry Harmon with operating Helix, a darknet-linked Bitcoin mixer alleged to have laundered more than $300 million worth of bitcoin.
Federal prosecutors unsealed charges against Larry Harmon in February 2020 over Helix, a Bitcoin mixing service he allegedly operated from 2014 through 2017. The indictment charged him with money-laundering conspiracy and operating an unlicensed money-transmitting business.
According to the Justice Department, Helix allowed users to send bitcoin in ways intended to conceal the source or owner of funds and was linked to Grams, a darknet search engine. Authorities said Helix had moved more than 350,000 BTC, worth over $300 million at the time of the transactions, with substantial activity connected to darknet markets.
The case was historically important because it placed a Bitcoin privacy service squarely inside U.S. money-transmission and anti-money-laundering enforcement. It also illustrated the government's growing ability to pair blockchain tracing with conventional criminal investigations rather than treating Bitcoin activity as technically unreachable.