Signs that Show if Someone Is Lying The following are signs you should look for when attempting to spot a liar: Body Language: Liars usually hide their palms and dont sit straight while telling a lie. They also avoid eye contact at the time of the lie and generally use negative evaluation gestures if they feel bad while lying (For more information, check the full page on a liar's body language). Eye Accessing Cues Mismatch: According to NLP The direction the eye takes reflects the function taking place in the brain at the time. For example, looking towards the upper left side means that you are constructing an image in your mind while looking at the upper right side would mean that you are recalling an image. How can that be of use? Well, think about it, if someone looks towards the upper left when asked about something, he's probably constructing an image of the lie he's about to tell. This is just one sign that he might be lying.(See the full guide to eye accessing cues and liar detection). Inconsistencies in the Story: In different places and times, the story is more likely to change every single time it is discussed. He will forget a word, add something completely new, or remove something that he had previously mentioned. Regardless of the type of inconsistency, it shows he is lying. Feeling Anxious: Almost anyone who lies feels anxious, with various degrees depending on how professional the liar is. One of your concerns should be trying to spot his state of anxiety; talk as much as you can about the subject in order to keep him anxious. Check out anxiety body language in order to be able to detect anxiety. Avoiding the Subject: A person who wants to hide something will usually try to avoid bringing it up in the conversation or even talking about anything remotely related to it. Try to talk about anything related to the situation without addressing it directly and see if he tries to jump out of it into another topic. Lack of Assertiveness: Unless that person is a special agent who is professionally trained to lie, he will usually lack assertiveness while lying. His tone of voice will be lower and he will appear to be less confident. Speaking Slowly: When lying, the person will usually be making up events as he goes along, which will result in slower speech or even several complete stops to think about what he's about to say.