The best way to tell if someone is lying body language.
Most honest people form relaxed body positions as they speak; their arms are held naturally at their sides or are used to animate the discussion.
When someone is lying, he/she tend to cross his/her arms across his/her body, forming a shield from scrutiny.
People who lie rarely leave their arms in a relaxed position or use their hands to emphasize a point.
That's because lying causes the body to tense up, which results in stiff arm motions and loss of animation.
