John Grogan knows if you’re lying. As a professional Polygraph Examiner, he’s tested everyone from infamous criminals and celebrities, to cheating spouses and lying employees. We talk lie detector tests, how to tell if someone’s lying and the only way to beat a polygraph test. Then, we countdown the Top 5 TV Shows We’d Like to Be On.John Grogan: Learn more about your ad choices. Visit megaphone.fm/adchoices