When it comes to fibbing, it takes one to know one. Some research suggests accomplished liars are better at detecting lies. They may also be good actors, and lack emotions such as guilt.
Vrij's research steers away from using traditional lie detectors because similar results can occur in people who are lying and those who are just anxious. The polygraph measures skin conductance, heart rate, respiration, blood pressure and finger temperature -- which all rise when under pressure, whether you're lying or not.
If you suspect someone of lying, the key is to listen out for less detailed answers, whether they stalling for time by slowly repeating the question, or if they're watching your reaction -- these are tell-tale signs lying.
Evidence-based interrogations can be a helpful method in finding the truth. CCTV can often be used to verify suspects' answers, checking if they were really doing what they said.
Charles Ponzi is one of history's famous liars, jailed in 1920 after the collapse of his fraudulent investment scheme. Similar swindles have since been known as Ponzi schemes.
Another famous case involved Aldrich Ames, a CIA officer who was given a life sentence after it was discovered he'd been spying for the former Soviet Union since 1985, receiving $1.5 million in the process.