9 ways to catch a liar

1) If you believe someone is lying, change the subject and they will follow along the new subject willingly.

2) If someone is lying, you can see some unwanted gestures being done by them.

3) A liar will use your words to answer your questions.

4) Liars hesitate while they answer.

5) Ask something unexpected.

6) Liars make constant eye movement and Uncharacteristic Blinking.Liars often move their eyes up and then left.(If they are right handed and vice versa for left handed )

7) It is believed that liars have difficulty in swallowing. 

8) Most liars have tendency to overact.

9) Confuse them and they will get irritated.