Well here you will learn the first and most important part of professional lying !
Eye Movement is what exposes 40% of liars and if you are smart and know how to recognize this you have a huge advantage over them.
Ok, let's begin :
1 When a person is Lying his eyes will role left , When a person is telling the truth his eyes usually role right ! Why ? When somebody is lying or telling the truth 2 different things happen in the brain !
A lie creates a left eye role because usually that's what happens when a person is accessing his front brain creative lobe the blue part of the brain shown in the image ! And When a person is telling the truth he's brain is accessing the back memory lobe (the red part) creating a right eye role !
These are natural reflexes of the human body and very few people know how to master them !
But trough practice you may learn how to control these movements and become a professional liar !