Or it was transferred to Accrum Exchange and used to buy Liberty Reserve.
I think Aurum Exchange is not that anonymously. If this was the case, they could probably identify the hacker, once given some information. But because all information that could lead to the hacker is classified by MtGox we will never know.
The idea that the thief did a wire transfer to their personal bank account is just stupid.
I agree, but even then, have you ever seen single police investigation in Bitcoin land? There have been a number of heists and not a single one. So why now? Why do you believe, that it will be different this time?
BTW, it is still be possible that one of the involved parties (Consultancy,Zhou,Tihan,...) was withdrawing.
The community could recognize some account number or anything. I doubt that some complete Bitcoin-virgin that did steal this.
I give you an example: someone recognized Zhou exchanging some 40k$ LR to RMB for some bad rate in a hurry a day after the theft. Zhou said it was unrelated, but this shows that a community can recognize way more than some astonished local Japanese police officer.