One of the most important things to remember when trying to catch someone who is lying or betraying you is to pay attention to their body language. If a person shifts in their chair, avoids eye contact, or speaks quickly, they may be trying to hide something. Additionally, it can be helpful to ask questions that require more detailed answers. This can help you gain more insight into what the person is really thinking and feeling. Finally, if you think someone is lying or being untruthful, it may be a good idea to get a second opinion from someone who knows the person well.