A U.S. court convicted the co-founder of a cryptocurrency mixer linked to North Korean cybercriminals for conspiring to operate an unlicensed money-transmitting business on Wednesday, but failed to reach a verdict on charges of money laundering and sanctions evasion.

In a press release, the Justice Department announced that the U.S. District Court for the Southern District of New York found Tornado Cash co-founder Roman Storm guilty of operating a service that helped criminals, including North Korean threat groups, launder their ill-gotten gains by obfuscating the flow of funds.