These don't work for very good liars. They know all these tricks, often intuitively, and purposefully avoid them. The only strategy that works is listening to your gut and extending trust slowly. Keeping up a ruse is tiring and the more time you give them, the more chance they have to make a mistake. Combine that with listening to the brain in your gut that has evolved for millions of years to sense danger. In the early stages, the mistakes are often subtle and you will usually only get a feeling that something is "off".