I am surprised why this case has not been resolved yet. Do Kwon is wanted for an international crime. He was arrested and should have been extradited to his country to be tried.
I do not know what happened to cause all this delay in his extradition, and now, according to the article, he has been released and is under house arrest, and there is a dispute over his extradition to South Korea or the United States. It does not matter to which country he is extradited, what matters is that he receives his just punishment in the end.
Criminal cases between countries are unfortunately very complex, but in the end, criminals should not be protected and punished, no matter how much there are differences in laws between countries.