some people cannot look you in the eye, excessive hand gestures...these are the ones I know about.
body language , i became an expert now , but some people really professional
natural intuition- something no one can hide from
A true sociopath can lie to you face to face without bl<x>inking an eye.
Eye movement away from you to side, slight increase in forehead reflectivity, hand wanders to face or scalp. Clearly sometimes their scalp itches. Plenty more signs
No. I give everyone the benefit of the doubt. Once.
How their eyes dart up and to one side while their brain tries to think of the next lie.