Write an article based on this "Ask for details about what they are telling you. Ask them to repeat what they previously said. Ask different variations of the same question. Keep asking questions.The deeper into the lie they get, the harder it will be for them to make up information and stick to it. Ask them if they are lying in a non-accusatory way."
For example, what time were they there; who did they go with; when did they leave? Liars often haven’t worked out the details of their story, and can get nervous or trip themselves up when they try to flesh it out. For example, you might say, “Wait…I’m confused, what did you say happened again?" Especially when making up the story as they go along, liars can't always keep track of what they have said. If you ask them to repeat the story, they may not remember exactly what they told you before and you may reveal that they are lying. For example, first you might ask, “How long were you there”. Then, a few minutes later you might ask, “So you stayed there about how long”. This technique is often used on surveys to check for consistency, and can be used in the same way when trying to determine if someone is lying. This will also lead to them panicking, therefore giving off vital clues to their deception.  Ask who, what, when, where, why, and how questions. For example, you might ask, “Who did you see there?”; “When are you getting here?”; “Where did you find it?”, etc. Vary the pace of your questioning in order to keep them off-balance. Ask a few questions back-to-back, without really giving them a chance to completely answer. Then slow down, and wait a few seconds between their answers and the next question. Then pick up the pace again. Try not to ask rhetorical questions like “Do you think I’m dumb?” or “Do you really expect me to believe that?” Questions like this can make people become immediately defensive While most people will answer “no”, regardless of whether they are actually lying or not, many people feel bad about lying and may admit it when gently confronted.  For example, you might try saying, "I feel like you're not quite telling me everything" or "I think there might be more you want to tell me".  Also, their reaction to the question might tell you more than their answer. For example, do they get extremely defensive or start behaving differently after you ask?