begins his trial for the crime of telling the truth. it s the subject of tonight s after 35 years of calling the polygraph an insidious orwellian machine big brother has had enough and is threatening him with prison. they ve done this before two years ago. they claim people such as williams are helping criminals hide their crimes. but if this machine is so reliable why is it so easy to trick? you can t teach a course on tricking a radar gun cops use to catch you speeding but polygraphs have contributed to thousands going to prison and