1. Look for symmetry both in the face and in the body. Real facial expressions are usually symmetrical on both sides of the face. The same goes for body language. Gestures happen at the same time with facial expressions when someone is telling the truth.
2. The eyes really are the windows to the soul. Believe it or not, liars tend to make more eye contact for longer periods of time than truth tellers.
3. Liars never forget. For some reason liars forget that most people forget things so they will never admit they don’t remember a certain aspect of their story. Somehow the lie creates a super human memory – which of course they are inventing.
4. The tone of voice changes when lying. Listen for high pitched or lower tones than their normal speaking voice.
5. Liars tend to avoid details when speaking. Often they just stick to the bold facts and leave out small details in order to keep their story straight.
6. If you ask few questions, they somewhat take their time answering it. Like they need to think of something to say.