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Lie detectors.

Gu Yi'an has seen this thing a lot of times, but it is the first time that he has gone into battle in person.

Seeing the scene here, she couldn't help but smile bitterly.

If you are an ordinary person, of course, there is no way to escape the polygraph. But for her, for those who are trained, a lie detector will not work for them at all.

It is easier to understand it in a very simple way.

Many of the polygraph's instruments are linked to the person's body to measure the person's heartbeat, pulse, blood pressure, and so on.

First, a set of simple questions, such as asking the subject's name, sex, age, etc., asked the subject to tell the truth, and used guò to determine the subject's physiological curve.

Then ask questions that require a polygraph, and if the subject is telling the truth, then his physiological curve will coincide with the previous physiological curve, and it will be the same, if there is a difference, it is a subtle difference. However, if the subject is telling a lie, his physiological curve will change greatly.

Of course, there is another way to test the EEG 'waves', but this is more troublesome.

The principle used in this polygraph is that when a person tells the truth and when he lies, his brain responds differently, which also causes changes in his heartbeat, blood pressure, and pulse.

And if you want to hide from the polygraph, you just need to have the ability to do both. You're telling a lie, but you're going to tell your brain that you're telling the truth, and you're going to believe that the lie is the truth, or you're going to believe that the truth is a lie, and after you deceive your brain, you're going to cheat your physiological response, and you're going to get different results on the polygraph.

It's hard for the average person to do this, but it's a must for professionally trained people.

And Gu Yi'an knew very well that he could do this.

Now, these methods are about to be used on her, and Gu Yi'an is a little helpless.

She was relaxed because she had nothing to hide, or rather, she wanted to know more than the other investigators what had happened!

The room was quiet, except for Gao Yang, there was only one man with glasses.

That man's temperament is very gentle, very elegant, and a gentleman.

When Gu Yi'an saw him, he knew that the person in charge of the test was him.

Her gaze flickered over him, and then, as requested, lay down on the test bench.

The man walked over and connected her to the various instruments.

"My name is Twilight." The man's voice was crisp and refreshing, with a slight smile.

Gu Yi'an nodded, "It's a good name for you." ”

"Thanks for the compliment." Twilight smiled, "These might be a little cool on your skin, but they'll be fine soon." ”

Gu Yi'an snorted and didn't say anything.

Twilight smiled again, "You don't look nervous at all. ”

"Should I be nervous?"

"Perhaps."

After a meaningless conversation, everything is connected.

"Gu Yi'an, right, can I call you An An? I'll ask you two questions first, test the instrument, and we'll start later, okay? ”

Twilight is very polite and will explain every move carefully, which will indeed give people a sense of reassurance.

But Gu Yi'an can't feel at ease at this time.

She has certain doubts about this twilight.

"Okay, my first question is, your name is Gu Yi'an, isn't it? Answer yes or no. ”

Twilight's voice is still very flat, and there is no 'private' emotional factor.

"Yes." Gu Yi'an's voice was also very calm.

"You're a doctor?"

"Yes."

"You like to be a surgeon?"

"Yes."

"Very good, the test is complete, there is no problem with the instrument." Twilight smiled and said, "Then we're going to officially get started, and you still answer yes or no, you don't need anything else, you know?" ”

"Hmm."

"Gu Yi'an, do you know the deceased Hong Chengang?"

"Yes."

"Are you happy that the deceased is dead?"

"Yes."

"Do you think the dead are innocent?"

"Yes."

"You have a hatred for the dead."

"Yes."

"You killed the dead?"

“…… I don't know. ”

"Please answer yes or no."

“…… No. ”

DiDi ......

The alarm sounded, which meant that Gu Yi'an's physiological curve had changed greatly.

Gao Yang's face changed slightly.

For the first time, he looked squarely at the weak so-called expert in front of him.

In the transcript, when asked if she had killed someone, Gu Yi'an's answer was indeed that she didn't know. This problem made the police very helpless.

But now, during the polygraph test, Twilight asks her if she killed someone, and she answers no, and the siren goes off, meaning that she may have lied on the subject. Gao Yang knew very well that if Gu Yi'an really didn't know whether she killed someone or not, then in this polygraph process, no matter if she answered yes or no, the alarm would go off.

But she couldn't answer yes, in that case it would be tantamount to admitting that she had killed someone. She could only answer no.

But when she answered no, the siren went off, meaning that she was lying that she didn't kill anyone...... So from the absolute negative meaning, doesn't it mean that she killed someone is the truth?

Although the results of this polygraph cannot be used as evidence to be submitted to the court, it is enough to use this result to continue to apply for Gu Yi'an's detention!

Gao Yang's eyes were quite complicated.

As a criminal policeman, he expects to solve the case as much as possible, but from another aspect, he also hopes that Gu Yi'an is innocent and can get away with it.

So today is the last day of detention and he is really conflicted. He is uncomfortable with or without releasing people.

But now, he really 'made' a chance not to let go, and he is even more uncomfortable.

The Q&A continues.

"Mo Yunsleeve is Bo Yi's wife?"

"Yes."

"Bo Yi doesn't know your relationship with Mo Yunsleeve."

"Yes."

"You don't want Bo Yi to know about your relationship with Mo Yunsleeve."

"Yes."

"You don't want to see Mo Yunsleeve."

"Yes."

"On the day of the crime, Mo Yunsleeve called you and told you not to sue Sù Bo Yi, and you actually didn't want to sue Sù Bo Yi in your heart."

"Yes."

"Mo Yunsleeve is missing, it has something to do with you."

“…… I do not know. ”

"Please answer yes or no."

Twilight's voice was as calm as ever. But Gu Yi'an was already sweating profusely.

“…… No. ”

Didi, the alarm sounded again.

Gao Yang's brows are already furrowed enough to kill flies!