They know it's happening, not how. Thirteen people were the living ledger of a secret, unhackeable bank: thirteen men and women with eidetic memories and a compulsive need to tell the truth. Twelve are dead.
The bank's customers will switch to cryptography and isolated systems, but light will have inched toward the dark deeds they hide.
I'm the last one --- the most protected man on Earth, thanks to my eidetic memory and my compulsive need to tell the truth.
The latter can take many forms. I put the gun in my mouth and press the trigger.