Lol at people who don't understand that polygraphs are fake. They are designed to cause you stress that you wouldn't naturally feel, thus making it apparent on the chart. The really sad thing is that the only way to tell what is a lie and isn't is to rank the questions against each other. Meaning if you are 100% honest and no lines are representing a lie, because there are none, the the questions are then ranked against each other randomly, there is about an equal chance of that indicating a lie relating to something they care about vs not ends up ranked in a way against your favor. It's completely and absolutely bogus. People fail them all the time when they shouldn't, and people who know how they work pass them all the time most of the time no matter if they are honest or not. There is a reason why every agency's background polygraph success rate is identical no matter what standards they try to apply. You can pass a secret service polygraph equally easy as a local pd polygraph. Why? It's just the inherent success rate of passing a poly that has nothing to do with people's honesty, or the skill of the polygrapher, or what issues are covered. I could ask 100 people if they murdered someone or 100 people if they've ever smoked pot and I'll get the same distribution. The stress of the question would probably lead to more positives on the murder, which polygraphers have to account for, which then they are adding their own subjective sense of how stressed out you are by the subject matter of the question personally. Which of course they can't do, so the whole test is noise. But I guess the PD hires low IQ people who automatically trust that any process works if it has officiality surrounding it. He probably genuinely thinks the justice system works too.