Investigative reporting is only as powerful as the truth it tells. Even the smallest error in a media investigation can be used by critics to devalue the entire project. Hall offers advice about how to make sure your investigation is error-free. The tips include "Ask tipsters why they want you to do the story" and "Keep going back to your main sources, quizzing them again and again on points to make sure their stories stay the same." All together Hall offers 17 pointers.