The document discusses how law enforcement officers can use nonverbal communication cues to aid in interrogation and deception detection. It focuses on four key areas of nonverbal communication: facial expressions and gaze, kinesics or body movements, physical appearance, and vocalics or paralanguage. The document provides lists of potential deceptive tells or cues in each of these areas that officers can look for, such as increased blinking, fidgeting or hand movements, pitch and speech errors. It emphasizes that these cues are not completely reliable indicators of deception on their own.