What if there was an app for determining if people are telling the truth? On the surface, the truth is simple. It weaves its way through all human communications. It's in people's eyes, how they hold their hands, how they tilt their heads, and particularly in the position of their feet. It is also in how they put their words together, in the words themselves and the stress in their voices. The FBI and the Department of Defense and police departments use this knowledge to compel suspects to betray themselves. That's what GUS SAINTE wonders about when he returns from Guantanamo with the pain...