My brother- in-law used to get cash every few weeks to go to CASH ONLY auctions to buy various equipment/trucks/scrap metal etc.
I can imagine that with SS's various businesses, he had times he needed access to cash as well. If he had large accounts with the bank, then he is legally allowed to withdraw some of it. It is his money. And the bank has to write a report when it is over 10k, but it can do so. And given the urgency of the situation, I am sure that SS explained it was vital that he be given some of his cash.
Banks don't do cash withdrawals of $10,000 over the telephone. For anybody. The only way Bank of America would do a cash withdrawal for SS was if he did the paperwork and submitted it before he phoned them on Thursday.
JMO