There are many occasions; you will find people are lying. They are available in every sphere of life. Sometimes they lie knowingly and sometimes intentionally and on few occasions according to circumstances. Many people lie boldly without batting the eyelid, some use sunglasses to evade eye contact. When a person tells a lie, the eyes betray and show the emotion. However, it is not expected from a consistent liar or a hardened criminal.

In many occasion, people telling lie are detectable from their blushing cheeks. This is a usual symptom for common people. This is observed by experienced people. Today, modern science has developed many gadgets to detect lie. The thermal camera with high-resolution is the best. This camera is very powerful and notices the rush of blood to the face accurately. This thermal camera is used to detect liars, criminals and terrorists. Therefore the camera is used in vulnerable places like airport Metro, busy streets and other public places.

The other means to detect a lie is to observe the body language and its movement. Avoiding looking into your eyes, acting nervously or feeling uncomfortable while switching postures, are some of the behavioral symptoms. Slip of tongue and incoherent statement identify a liar. He may try to avoid some specific incident even after repeated questions and be on the extreme defensive attitude. This will deduce that the person is trying to protect someone or hiding facts. This method is the easy way to tell when someone is lying.

It is difficult to predict lie from nonverbal behaviour. Detecting deception is hard task. Inconsistency in statements is a lie. The statements are then imposed on the individual in a tricky way and convincingly. Experienced interrogators can detect a lie easily.

People frequently say that they do not mislead others, but on the other hand, they keep back important information. This is different way of telling a lie. When they are trapped telling lies, they become extremely defensive and try to alter the subject abruptly. However, it is very difficult to prove the lie or truth from a person's behavior but your instinct will tell when someone is deceiving with lies.