There isn't any specific answer to the question you ask, in the sense that what might be kept confidential will differ d'un examen à l'autre, par exemple. What I do is reveal only enough information to support the conclusions I'm offering in the report. Remember that the investigations are conducted in private, and we try to guard confidentiality as much as possible. The only exception we make is when we feel we have to reveal something in order to support the recommendations the report is making. We don't know in advance what kind of information it's going to be.
On September 20th, 2006. See this statement in context.