New Scientists reports on the development of a lie detector that works by tracking blood flow through the blood vessels in your face. The system is being developed by (natch) the Us Department of Defense.
As I relax into the chair, the questioning begins. An automated voice instructs me to answer a series of questions with a simple yes or no. "Is your name Susan?" Yes. "Do you understand that I will not ask any trick questions on this test?" Yes. "Did you stab that woman downstairs this afternoon?" No.My voice remains calm and even, and I feel no sense of flushing as I continue answering questions and read through a list of potential murder weapons, including the one I guiltily remember using earlier, a screwdriver. But as Ryan's colleagues look through the data afterwards, they pull out two images and set them side by side. The first image looks normal. On the second, large highlighted rings of blood encircle my eyes.
If I were a real criminal, that picture could be big trouble for me.
