Yes! Like they are going to keep self-incriminating evidence for potential review by outsiders! And as experts in criminal behavior, and criminal law, how could they ever be convicted of their various crimes UNLESS there are perpetrators, and probably would need more than one, within their own agency who would testify against them, but then, again, without the physical evidence, it would amount the the he said/she said kind of thing, and a jury would conclude there are "reasonable doubts".