I think at some point you might be able to detect lying with high accuracy given a DNA sample, a high resolution/high fps camera pointed at the person's face, and a vocoder-generated questioning regime.
However, it would be very expensive to develop the training data for such a system, and it might not work on rare ethnicities. Or other abnormal people, like autists and evil geniuses.
However, it would be very expensive to develop the training data for such a system, and it might not work on rare ethnicities. Or other abnormal people, like autists and evil geniuses.