When you ask the bank why they close your account, whether their answer? In my opinion there is only one reason why the bank closed the account of the person, ie since the bank go bankrupt. In my country there ever bank that went bankrupt and closed more than 1 million accounts of customers and amount to trillions. I personally still believe the bank because I am sure the bank that I chose is a bona fide bank. You can sue him in court if you do not make mistakes that lead to your account closed.
In this case the account is closed and the bank is still operational. I think Op is hiding something. As far as I know bank cannot freeze or close your account unless there is a court order. About balances being drained, there is a fee using their service to store your money. So don't surprise if in the long run your account balance become negative.
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In a day to day operation of the bank as well, we do receive memorandum from AMLC for suspicious person and we double check it with our system and report directly to them in an encrypted report file.
Hear it from the bank guy. This might be the case with OP.
You obviously overlooked details in my original post. The banks in the United States DO NOT need court order at all to freeze or cancel anyone's account. There are NO such laws require banks to obtain court orders to kick their customers out. If you want to sustain your views then please bring evidence to the table.