Do Kwon, the South Korean cryptocurrency entrepreneur behind two digital currencies that lost an estimated $40 billion in 2022, was set to appear in U.S. court on Thursday to face criminal fraud charges after being extradited from Montenegro this week.

Kwon faces charges in the US and South Korea after the TerraUSD stablecoin and its sister token Luna crashed in 2022, causing investors to lose $40 billion in the process. Both countries have issued extradition requests for Kwon,

PODGORICA, Montenegro (AP) — Montenegro on Tuesday extradited a South Korean mogul known as “the cryptocurrency king” to the United States, following a decision of its justice ministry earlier this month to accept a U.S. request, while refusing a South Korean handover plea, the Balkan country’s authorities said.