Why did hackers stole 750.000 Bitcoins only from MTgox and did not touch any other exchanges?

What is Karpeles doing at the moment? Can he get out of Japan or is he "arrested" to Japan?

Does somebody know this?

I´m still sure Karpeles stole that coins and say hackers did that. Can he go to jail for the insolvency? or is it really so easy to open up an exchange, let people invest millions and then shut it down? I mean, easy way to get rich!?