Basically there are no unusual signs. There is no trick that gives you information if person is lying that gives out on the spot. As much as pop-culture would

Basically there are no unusual signs. There is no trick that gives you information if person is lying that gives out on the spot. As much as pop-culture would like some eye movement or what not. Only thing that gives away lies is cross examination and asking multiple times about the same thing in a slightly different way. After asking 10 or 20 times about the same thing you might see that things don’t add up. It might be easier if you have 2 or more people making stuff up because if you separate them they will lie in a different way. Of course there are also people so bad at lying that will give out at first interrogation…