maybe the same way someone i used to work for didn't miss over a hundred grand. Because the IRS can talk to the bank, seize as much as they want, and the bank doesn't have to notify you. All accounts looked normal and no money was "missing" (according to the online statements). But in fact, that one account, had a lot of money seized from it, before the actual IRS raid happened. The only clue was that the account was "locked". Stolen more like it and nothing that the boss could have done about it either.
and people wonder why i don't trust them.