While mtgox/Mark doesn't talk much and IIRC just said the coins are "lost" or "temporarily unavailable" it is widely assumed that they have been stolen by hackers or embezzled. AFAIK there's just legal actions going on concerning mtgox' bankruptcy (protection). Why no criminal investigation and search for the coins? If there is a bank robbery or even a house burglary the police come and investigate. Why not with mtgox where insane amounts of value was lost? Did we just forget to report it to the police? Why don't we report it and they confiscate the servers and investigate, as they would in a case of child pornography ... instead of risking that Mark or the hackers (if they still have access) wipe any traces.
I know some Tokyo residents have complained to the police, and there is a police investigation going on, separately from the bankruptcy proceeding.
From today's newspaper (Sankei Shinbun):
http://headlines.yahoo.co.jp/hl?a=20140417-00000505-san-sociMy translation (Warning - IANATranslator):
The bitcoin exchange Mt Gox has had its application for rehabilitation denied by the Tokyo District Court and seems likely to file for bankruptcy, but the police continue their investigation, both by analyzing data provided by the company and by gathering evidence from users who are claiming losses. However, they have not yet formed a full picture of what occurred.
In the data they presented to the police after their application for rehabilitation, Mt Gox said that their bitcoins were stolen through a system problem. The police are gathering evidence from Mark Karpeles and continue to analyse data.
A source close to the investigation said, "If this theft happened it may be a classifiable as a computer fraud, like theft of electronic money", but says that they have not yet confirmed that the theft really happened.
The investigation source claims Mt Gox did not even talk to them about losses amounting to 2,800,000,000 yen in cash, and says, "Not to have reported this is astonishing. I wonder if it was really stolen."
