How to tell if someone is lying to you

If you've got your doubts about someone, here are 10 tips from the FBI to help you decide if they are lying to you.

Sudden changes in behaviour should raise a red flag.

Try listening more and speaking less - liars tend to do the former. And they will often talk louder and faster when they are being deceitful.

Beware of too many compliments, too.

These tip and more in our video above.