[Spooky23]

Any time there is an investigative event, whether a internal one, litigation, police, etc, written communication is a used to infer all sorts of things. Attorneys and others build careers out of sussing these details out of email.

Do some googling of “Enron email corpus analysis” or similar things for examples.

It’s very easy for someone to say even innocuous things that in a different context sound damning or infer a state of mind that may or may not be accurate, but can give someone a way to dig into more detail.