Worked in retail banking for 7 years. Can tell you that the tellers are required to submit illegal activities to the investigation department. Not only this but things like elder abuse, child abuse, identify thief (happens too often with parents and their unwilling kids).

Ya, don’t mess with banks. Because you might mess yourself up or someone you care about.

Bonus Story: I had someone come into the branch wanting me to try and change a line item that said something like blowjobs from a coworker that was paying him back for lunch. Dude was getting a divorce and that shit caused a ton of headache for him.