I heard that looking to the left means that the guy is telling a lie. But some people also say that people will look to the right when they are lying. I think looking left or right towards the ear or other parts all mean that the person is trying to recall what they heard or to remember what they saw. If we can't remember clearly we will try hard to think about something and try to put the pieces together. If the person is under such circumstances, you can't say that they are lying. And look toward left or right may depend on different people. It is a good way to watch them closely about how they answer everything. But we can't judge whether it is a lie in this way.