A talk with Olu Popoola, who is a forensic linguistic analyst, deception researcher, and fraud investigator. We talk about the science of using "coherence relations" (i.e., how the phrases and sentences in a text relate to each other and form a coherent structure) to detect indicators of deception. We spend most of the time talking about Popoola's work on finding indicators of deceptive Amazon book reviews, including his analysis of reviews for Hillary Clinton's recent book.