A co-founder of Tornado Cash, a digital-currency “mixing” service that was used by North Korean cybercriminals to launder stolen funds, was convicted of one of the three criminal charges he had faced, after a three-week trial in New York federal court.

A U.S. jury deadlocked on Wednesday on money laundering and sanctions evasion charges against the founder of Tornado Cash, a firm that makes cryptocurrency transactions harder to track. The jury in Manhattan federal court could not reach a verdict on charges Roman Storm conspired to launder the proceeds of hacks,

A co-founder of Tornado Cash was convicted of conspiring to run an unlicensed money-transfer operation that laundered more than $1 billion through the crypto platform in a closely watched case with sweeping implications for open-source development and blockchain privacy.