How would you react to being asked whether you’d killed your neighbor and buried them under a rose bush in your back garden? Would it make you break out in a sweat or make your voice quiver? What about any activity in your brain? Judging from countless crime shows on TV, your body would probably do something that any seasoned detective could interpret as a sign of your lying – no matter how you answer.
And if the detective misses any of the tell-tale signs – you can be sure that the simple lie detector or polygraph will pick them up.