What are some tips for figuring out if someone is lying?

To catch a person in a lie, listen for inconsistencies, statements that deviate from normal human behaviors. Look and listen for parts of the story that do not fit. Watch for unusual demeanor, as in uncharacteristic nervousness in a usually calm person or eerie calm in an anxious person.

Smiles are hard to fake, so notice if the speaker's smiles look genuine. The timing of the smile may be wrong, it may last too long or it may not look real. Sometimes when a speaker is lying, his words may be saying one thing, but his body language says the opposite.