I've recently started watching the series Lie To Me on Netflix. I wondered if there was any actual science behind the feats of Dr. Cal Lightman (main character) and started doing some research. Turns out that the series is based on the work of Paul Ekman, a psychologist who studies emotions and their relations to facial expressions.

Long story short, I believe that in order to maintain a strong frame with anyone you should have the ability to read that persons emotions and see if they are lying or being truthful.

I went looking for books on the subject and started with this one titled: Detecting Deceit by David Craig. After I'm done with this one I'll be reading Telling Lies by Paul Ekman.