The service offered by The Lightman Group is truly unique. Simply stated, they can tell if you're lying. It's not the words you speak that give you away, it's what your body and face have to say.Dr. Cal Lightman and his team are experts at reading micro-expressions, the fleeting tics that express, non-verbally, what we are really feeling. With their finely honed interviewing and investigating skills, they have an uncanny ability to dig up the truth.