How to discover a liar

Hello, I need to learn how to identify a liar before it is too late and you lose your stack for believing more in your confidence and not seeing your opponent who always ends up stealing from you, precisely because of his ability to force you to fold your hand.

collecting information on each player will help you
for this you need concentration of attention throughout the game and the ability to read the board and the approximate range of your opponent

Yes, at a table it works, but in a tournament it is a lottery, try to apply what you say, but so far it did not have good results