Not only was keeping a private email server against the law, when asked to turn over the emails, she printed them out on paper, 55,000 pages of paper. What motive would she have for doing that, other than to make any investigation harder?
Think about whether you want police officers to wear cameras, and why you want them to wear cameras. It is because we don't trust them, and for good reason. Well, you shouldn't trust public officials either, even if they are on 'your team.'