Free to read
Written for the person who has been told there is an investigation, by someone who spent thirty years running them. If one of these answers your question and you never come back, that is a good outcome.

A written account is the most consequential document you will produce in an investigation, and most people give it less care than a spoken answer. Here is how it should be built.
The meeting has a structure, and it is deliberate. Here is what each phase is for, what the investigator is doing, and the four mistakes that account for most of the damage people do to themselves.
Some questions are designed to gather information. Others are designed to work on you. Here is how to tell them apart, what each one is built to produce, and why the answer to all of them is the same.
You've been told there's a meeting about a concern, and nobody has explained what that means. Here is what the meeting is, what happens before it, and the one thing worth doing with the time you have.