Detectives of Detective World

Although it is just a feeling, for criminals, criminal intuition is actually very important.

Although this is a mysterious and mysterious feeling, it is the feedback brought to them by the accumulation of experience.

And after watching the video, Tang Ze and Officer Mumu and others made the same judgment.

There must be something wrong with Yoda Uno.

Generally speaking, even a person with no problems will feel panic and anxiety in the face of doubt when they enter the interrogation room.

But the other party has no such feeling at all, and some just feel aloof.

It's a bit like a game player, no matter how powerful the monster in the game is, you know that he can't jump out of the screen to hurt you.

So you can play wildly, play with the characters in the game, and become the "fourth natural disaster" without any scruples.

This was expressed in the other's demeanor, tone, and even in every move.

In particular, one detail made Tang Ze even more certain that the other party had a problem.

When Mikako Sato opened the door of the interrogation room, Yoda Uno stretched out his hand to check the time, and then showed a calm smile.

Then, after police officer Mumu got the news of the deliveryman, he told him that he could leave.

That gesture seems to have known the answer in advance.

If he is not a prisoner, then he should not know the time of Kouji Xiangyou's death.

Even if he did meet the delivery guy at 9:10, that shouldn't be his confidence.

But where did this confidence come from?

This may be the crux of the case.

But unfortunately, all Tang Ze watched was video footage, and he didn't have a chance to communicate with the other party.

In the video, after Officer Megumi signaled that the other party could leave, Yoda Uno stood up and straightened his suit.

"The estimated time of death was known through autopsy. Sure enough, the power of science is great."

Before leaving, Daitian Yuno looked at everyone and said with a smile: "You people, don't always doubt others without basis.

We should make more use of the power of science, so that we can find out things clearly. "

Before leaving, Yoda Uno smiled smugly at the silent three people in the interrogation room, and then opened the door to leave.

"Wait a moment!"

After hearing Yoda Uno's words, he seemed to be reminded, but Takagi on the side suddenly stopped the other party, "If you say that, can I delay you for a while?"

"What? Is there anything else?" Yoda Uno stopped and turned to ask.

"We would like to ask you to cooperate with the polygraph test." Takagi looked at Yoda Uno and said solemnly, "Since you said that you are not the murderer, naturally you won't feel guilty, right?"

"Exciting tactics? You don't have to use this method. If you feel that you can feel at ease, I will cooperate with you."

Daitian Yuno spread his hands and said with a smile: "Anyway, I have nothing wrong with me. After the test, you shouldn't harass me again, right?"

"Naturally." Officer Mumu said solemnly.

The video ends here, and soon Takagi called up another video for him.

This video is in another room with a polygraph, which was recently opened by the Metropolitan Police Department.

Soon, a person from the forensics class came to the room, and after communicating with the other party, he asked Yoda Uno to put on a polygraph.

The lie detectors of this age are still very simple. The instrument is placed on a table, and then one side of the sensor is tied to the other's chest and fingers.

As mentioned earlier, the lie detector is based on breathing, blood pressure and pulse, as well as changes in skin temperature and heat.

In particular, the skin resistance indicated by the red line will change significantly.

This red line is really the red line. The current polygraph shows that the fluctuations are not on the electronic screen, but the kind with line-drawing ticks on the scroll of the paper.

Of course, simple and simple, the function is still the same, and the pointer can also change according to the skin resistance.

After the instrument is put on, the video starts the pre-check, which is the test with playing cards mentioned earlier.

In the video, Daida Uno still cooperated with the supervisors and began to deny one by one.

And when the poker "6" is the card he saw, and the other party answered "no", the red line that had not fluctuated immediately began to swing up and down in a big way, drawing on the white paper that was moving forward. A sharply fluctuating red line.

This also proves that the lie detector is not malfunctioning and can detect the lies told by the other party.

But even so, Yoda Uno remained indifferent after the test.

After that, the forensic staff handed over the list of questions that need to be asked later to the other party, so that the other party can check and confirm.

That's right, before the official test, the subject will be informed in advance of the questions to be asked later.

This is the "questioning method at the highest point of tension", and the content of the question is mixed with a thing that only the prisoners and their criminals know.

And let the subject know the next question from the beginning, just to prepare his heart.

When it is time to ask the right questions after the false information is denied one by one, the subjects who have been prepared for a long time will unconsciously get nervous.

This is a normal physiological reaction of human beings, and there is no way for ordinary people to completely calm down.

This is also the key to this approach.

In the video, the first question asked by the forensic personnel was "Do you know the color of the clothes Kouji Xiangyou was wearing on the day of the crime?"

red, green, blue...

After asking the colors on the question sheet one by one, the needle on the polygraph did not fluctuate drastically until the end.

Including the "yellow" question for the correct answer, the polygraph still hasn't changed.

Afterwards, the supervisors followed the question sheet and asked the other party if they knew how Kouji Xiangyou was killed.

Strangled with bare hands, strangled with a tie, strangled with a towel...

When asked about the "rope" of the correct answer, Yoda Uno's answer was still "I don't know", but the lie detector did not respond at all like the previous answer.

"Okay."

After all the questions were asked, the forensic staff took off the lie detector for the other party: "Thank you for your cooperation."

"It doesn't matter, if this can save me a little trouble, I'm still happy."

In the video, Yoda Uno looked up at the camera and said with a smile: "As expected, the machine is still reliable, and it won't make redundant, unreasonable, and unfounded speculations like people do with the concept of being trapped in the main."

Looking at the sarcastic expression of the other party in the video, coupled with the sarcastic words, Tang Ze could already imagine the expressions of the people watching the surveillance in the observation room at that time.

But unfortunately, they can only be incompetent and furious.

As Yoda Uno said, their speculation is based on being the master without any basis. Just because the other party has always been "frivolous", they put the other party in the ranks of suspicion.

The polygraph machine, on the other hand, has no emotions and no bias.

It just records all the data faithfully and objectively, but it is a more fair existence.

They even suspected that there was a problem with the instrument at one time, but when Takagi sat up and tried two questions, they found that the polygraph was not wrong at all.

This fact is irrefutable.

Even if they are not reconciled.

The detection map without any changes clearly told everyone a fact.

Yoda Uno is really not the murderer, he doesn't know any details of the murder.

Of course, generally speaking, the failure of a lie detector is not a big deal, after all, nothing can be 100% accurate.

After all, the lie detector is based on the physiological response of people when they lie to judge whether the person to be tested is lying.

Some people may be born with abnormal constitutions, otherwise it is not a big problem at all, but they can escape the detection of lie detectors.

So if the lie detector fails, it is understandable.

But this guy is a little unusual, his suspicion is too great.

Not only the performance, the tie clip dropped at the crime scene is too suspicious.

Although it is true that as the other party said, it may be a necessity for his tie clip to fall on the scene of the crime, but for the search, all accidents are inevitable!

At least they have to use this attitude to eliminate every suspicious point.

As for the impact, it is also because the identity of the testers this time is somewhat special.

The other party is a physicist, and he passed the polygraph test under such great suspicion.

This makes the above people have concerns.

If the other party is really not the murderer, it's okay, if it is the murderer, will the other party have some means to let him avoid the detection of the polygraph.

If there was a way to block polygraph detection, that would be a big problem.

If this problem is discovered after large-scale use, there will be a possibility of wrong cases in countless cases before.

So this impact is absolutely huge and absolutely cannot be ignored.

If there is any possibility, then Tang Ze's decision will be cut off mercilessly.

Even if there is no convenience, at least there will be no problems in the operation of the Metropolitan Police Department.

And once it is found that the other party really has the means to block the polygraph, it proves that the "polygraph" has become a thing of the past.

The so-called science is like this, and the continuous upgrading of technology will make some existing technologies obsolete.

Check and balance, and the development of technology has always been like this.

But Tang Ze felt that even if such a situation would occur in the future, at least it was not the case at hand.

There is absolutely something wrong with that guy!

He thought that if the instrument was fine, he would be able to prove his innocence?

It can only be said that the professional habits of scientific researchers make him a little "arrogant".

This may be the case in other occupations, but definitely not the criminal one.

Their work is full of lies and deceit, and the enemies they have to face are trying every means and tricks to escape their sins.

It's just a test of an instrument, it's impossible to dispel their suspicions.

Even when Tang Ze implemented this policy, he said that the polygraph can only be used as an aid, and cannot be completely new.

The purpose is to prevent inaccurate things from happening, which is also known to the upper-level bosses, and the initial positioning is indeed to use it as an auxiliary tool.

This time, it was because he was afraid that the other party would master the means of evading the lie detector.

If countermeasures have emerged, there is no need for large-scale use of polygraphs.

In simple terms, the error rate can be tolerated above, which is inevitable, but it cannot be tolerated that the instrument has a cracking method.

This is conceptually different.

When an auxiliary tool and even the reference can be greatly distorted, there is no need to exist.

It is precisely because of the different nature that Saito Hiroshi called Tang Ze quickly to inform him of the seriousness of the matter.

"That's the situation." After Tang Ze watched the information and video, Officer Mu Mu said, "We can't confirm whether the other party has any problems now.

But the polygraph did show that he didn't know the details of the killing..."

"The case is deadlocked now." Takagi on the side also sighed and said, "My investigation couldn't find any place for the other party, and his alibi is perfect."

"I don't know what happened to the murder, it doesn't mean there is no problem."

Tang Ze said solemnly: "Generally speaking, even people who have nothing to do with the case will be a little nervous or even suspicious when they undergo this kind of examination for the first time.

But his performance is too calm, I found in the video that he has hints to induce you to use a polygraph against him. "

"What!?" Takagi was shocked when he heard the words: "Are you saying that we are all tricked?"

"Generally speaking, people's nature is to seek advantages and avoid disadvantages. Since you have proved your innocence, there is no need to provoke criminals, right?"

Tang Ze said: "The public always avoid criminals in the office for fear of getting into trouble, but the other party mocked you before leaving, which obviously does not conform to the psychology of ordinary suspects.

There are so many fools who can become associate professors. Weighing the pros and cons is something every adult will do.

In other words, he should have done it with a purpose. "

"You should use the power of science more, so that you can find out things clearly."

It was these words with strong and hidden hints that made Takagi think of using a polygraph.

Tang Ze even suspected that the other party knew that the Metropolitan Police Department had recently introduced a "polygraph" decision, and then made a "trick" based on this decision.

After all, if the other party does not induce a "polygraph" test, then the police will definitely continue to investigate the other party.

But now, the lie detector has also done.

If you can't come up with tangible evidence or breakthrough progress, you don't even have an excuse to ask the other party to cooperate with your "informal search".

People say that I have even checked the polygraph, and I will block you to death, and there is no room for manoeuvre.