Another signs showing the person is lying is that they are going to touch their mouth,or nose but their hand will be infront of their mouth. It is like they are trying to not let go the lie out of their mouths.
Another sign that someone is lying to you is right there in their eyes. When they try to think of the lie, their eyes tend to move up and to the right in their eye sockets. When a person is trying to remember something his eyes move up and to the left, when they lie they go to the right.