Karpeles has nothing to do with the US, there is no way as foreign citizen who did not commit any crime on US soil would be extradited to US, ever.
Only Japan have the right to judge him because he committed his fraud and his company was registered under Japanese jurisdiction.
Even if he is really married to US citizen woman, he has right to refuse trial in the US - if that ever happen.
I'm going to have to disagree with you there. Try telling Big-Kim.com. Hongkong company with him living and based in New Zealand. Still a target.
If you EVER touch US Dollars, which mtgox definitely did, the 'Reasonable and Non-Draconian' US Government has you in their sights.
Also - the Domain, mtgox.COM puts you in a grey area, as that is how they went for Kim in the first place. The traffic was being directed from a US server.