Can't remember the airport, but a few months back, TSOs summoned LEOs at the checkpoint. IIRC, the woman had several consecutively numbered personal checks in a pocket. The TSOs found the checks and decided she was cleaning out the joint bank accounts and running away from her husband.

I'm not sure how that related to aviation security. The LEOs were summoned. The LEOs did not ask what this had to do with TSA's alleged mission, aviation security. The LEOs attempted to reach her husband, it turned out that everything was completely above board.

(No one ever explained why it was a TSA or LEO matter. After all, in the absence of court judgments, if the woman hasn't forged the checks (and what reason was there to suspect that had happened), I don't think it's illegal to clean out a joint account anyway.)

And you should read up on Bierfeldt. IIRC, according to one of our resident (real or alleged) TSOs, they are still allowed/required to report large amounts of currency, particularly if the pax won't tell them how much money there is. Also, the BDO at BUF who got busted for escorting drug dealers around security was apparently doing so not because they were carrying drugs, but because they were carrying large sums of cash (and I think fake IDs, too, although those seem unlikely to look suspicious on an x-ray).

Even if the drug dealers were carrying more than $10k, if they were travelling domestically, there should have been no reason for concern, because it is supposedly not illegal to carry large sums of cash in the US. However, the BDO clearly knew that if the sums were discovered, there would be follow up - otherwise, she wouldn't have taken the risk of openly escorting these guys and their cash around security.