Our mandate is to investigate, to find out what happened and why it happened, not to attribute blame or to assign criminal or civil responsibility. That leaves our interaction with people very free in terms of their being forthright in telling us what happened, because they know it can't be used against them for either enforcement purposes or civil or criminal liability. I think that we get a lot more benefit from the fact that it can't be used against them, in terms of identifying what went wrong and what needs to be done to prevent it from happening again.
That being said, if we identify something such as inappropriate use of electronic devices or some other issue, we do not refrain from reporting on it, because somebody else might infer blame.