Are we talking something beyond just robbing a card??...like computer hacking or an inside person.
I'd guess that bells and whistles would go off if you deposited $10 mil on you debit card or to any account for that matter.
If the story is true, there would have to be someone one the inside (or a hacker with access to that account) to transfer the money as soon as it arrived. And it would have to be a heavyweight in computer technology and security, I would think, to avoid all the government traps and traces.