ChainCatcher news, according to Sisa Journal, a key figure in the alleged billion-dollar KOK token fraud case has been arrested in the United States and is currently undergoing trial in immigration court. South Korean authorities are working to extradite this individual, and discussions have taken place between the two countries regarding the matter. The South Korean Ministry of Justice declined to comment, stating that the investigation is still ongoing, including information related to diplomatic relations.It is alleged that the cryptocurrency KOK, launched in September 2019, was used to raise funds through a pyramid scheme, with industry experts estimating that South Koreans alone lost 40 trillion won (2.89 billion dollars) in the scam.