Three experiments were conducted to identify a limited set of indicators of truthfulness and deception in oral narratives and exchanges, as well as to train laypersons to use the indicators. In Experiment 1, participants attempted to judge whether an actor in a video was being truthful or deceptive during a consensual conversation with a law enforcement officer. Truth and deception were defined by a limited set of indicators compiled from the research and literature review by McCormack et al. (1). The results showed a strong bias toward judgments of deception. In Experiment 2, research volunteers were instructed to give arguments that were either consistent with their true beliefs or opposite their true beliefs. Differences in verbal, vocal, and behavioral components were quantified and were used as training materials in Experiment 3. With limited training on the indicators, laypersons in Experiment 3 did not improve their rate of accuracy. Practical implications for detecting deception and implementing training protocols are discussed.