According to a press release from the Department of Justice on November 29, 2019, Virgil Griffith, resident of Singapore and U.S. citizen, was arrested for a criminal complaint where he was charged with violating, “...the International Emergency Economic Powers Act (“IEEPA”) by traveling to the Democratic People’s Republic of Korea (“DPRK” or “North Korea”) in order deliver a presentation and technical advice on using cryptocurrency and blockchain technology to evade sanctions.
https://www.forbes.com/sites/jasonbrett/2019/11/29/us-authorities-arrest-virgil-griffith-for-teaching-cryptocurrency-and-blockchain/
