He also turned around a defense theme -- "don't trust the messenger" -- and said it was the defense who were not to be trusted.

CNN: Prosecutors underscore evidence in final argument

But what they will take away from scandals like these is that banks cannot be trusted, and what lots of folks in the financial world neglect to understand is that without trust, their business (and all business) dies .

FORBES: Why the Barclays Scandal Matters for Marketers