The psychological test room is undoubtedly the most warm functional room of the Criminal Technology Center. There is no slogan of "Frankness, leniency, resistance and strictness" on the interrogation room, no rules and regulations, no public security badges, and no blue and white public security logos.

One wall is one-way tempered transparent glass, and the other three walls are sound-insulated, including the doors, and there is a soft carpet on the ground. The whole room is beige and there is a pot of green plants in the corner of the wall. It is very quiet and warm, and even the lights are so harmonious.

Lie detection not only requires a quiet environment, but also the room temperature must be kept between 22 and 25 degrees Celsius. Only in this way can the person who is tested feel comfortable and the data presented by various body indicators are the most realistic.

"Comrade Zhang Xingbao, don't be nervous, let's play a game first."

The technical police officers invited by Congjiang City Bureau were very satisfied with the psychological test environment of the Nangang City Bureau, and even envious. They took out a deck of playing cards like magic, and planned to play for a while based on their posture.

Zhang Xingbao looked up at the camera in the upper left corner, looked at the one-way transparent glass on the right, recalling everything that happened from morning to now, no matter how stupid he was, he understood that what he had been worried about almost every day for eleven years had finally happened.

The municipal bureau was transferred to participate in the special anti-drug operation and asked to send the inspection materials here in the morning. After completing the inspection procedures, the instruments just purchased by the Criminal Technology Center were pulled to test the instruments newly purchased by the Criminal Technology Center. All of this was arranged by the person who investigated the Xunli case.

I didn't expect that I would investigate it over the past few years, and I didn't expect that they would doubt themselves as much as the case handlers back then.

Eleven years, how many eleven years are there in life!

This matter must be settled. It is better to accept a lie test. It is a blessing or a disaster or a disaster, so as to avoid being worried all day long.

Zhang Xingbao didn't want to waste his time, so he stared at the young lie detector and asked: "Comrade, are you your surname?"

"I don't have your surname Xu, this is my colleague Xiao Tong."

"How many times have you tested it before?"

The subject of the test this time was not an ordinary suspect, but a policeman who had worked in the public security system for more than ten years. Yesterday, he was sitting in the drug rehabilitation center to interrogate drug users while inquiring, which was not easy to deal with.

Xu Hua was ready, shuffled the cards quickly in his hand, looked at him with a smile and said, "More than a hundred times, the accuracy is 100%.

"I'm sorry, I'm not worried that you've measured it too accurately, but that I'm worried that the test will not be accurate. This is to investigate the Xunli case eleven years ago. I cooperate. Actually, I have always hoped to accept lie tests. How to play, I only know a few simple things, such as fighting for the best and 80."

Zhang Xingbao was open and honest, but the people in the conference room felt a little surprised. It was not that he didn't look like a suspect who committed the crime, but that the serious lie detection turned into playing cards, it was too silly.

Han Bo and his partner looked at each other, walked to her and took the mouse, and took the projector connected to her laptop.

Professional issues shall be introduced by professionals.

Zhou Suying is both a political commissar and a professional. She has served as the director of the Medical Affairs Department of Ankang Hospital and the vice president. She is a member of the Nangang Judicial Psychiatric Appraisal Expert Group and a director of the Nangang Mental Health Association. She has been engaged in the clinical work of psychiatric departments for more than ten years, has excellent medical skills, and has conducted in-depth research on various mental disorders.

The principle of psychological testing comes from medicine and psychology, and is no different from her major.

Since he was transferred to the position of political commissar of the Technical Investigation Detachment, he has been studying psychological tests. His theoretical level is much higher than that of the two technical police officers downstairs, but he has never practiced it.

She smiled slightly and explained in fluent Mandarin: "Dear leaders, lie detection is not about testing whether the person being tested is lying, but about testing whether he has special memories of the facts of illegal crimes or a specific event. When a person is subject to a certain psychological stimulus, his physiological indicators will change significantly.

For example, accelerated heart rate, rapid breathing, increased blood pressure, changes in skin resistance, muscle tremor, etc., these subtle reactions can be sensed by psychological testers, thereby displaying changes in pulse waves, breathing waves and other parameters on the instrument.

Because the person under test has committed certain illegal and criminal acts, the image he perceived, the emotions he experienced, and the behavior he took will leave an extremely deep impression on the brain. Once asked about matters and crimes related to the case, his psychological and physiological reactions will inevitably be captured by the psychological tester, which will eventually reveal the heart of the person under test. In layman's terms, the body is betraying him."

"Xiao Zhou, I understand the principle a little bit. What I want to know is when will the test start?"

"From the surveillance video, Zhang Xingbao's mental state is relatively stable, and he should start at most half an hour. In order to ensure the accuracy of the test results, the person being tested should be as relaxed as possible in all aspects of the psychological and physiological aspects. The two technical policemen played a few small games with him, just to make him relax as much as possible."

Han Bo has experienced big scenes and has rich reporting experience.

Considering that there might be a "cold situation" before psychological tests and formal interrogation, I deliberately did not report any situation when I reported it just now, and clicked the mouse to project a beautiful girl on the screen.

Zhou Suying understood it and pointed to the screen and said, "Dear leaders, this girl is called Liang Liyun. This is a photo from eleven years ago. She was also a staff member of the seafarers club that year. The victim's blood was found in the scrapped car No. 8. When determining the investigation direction of the man-killing investigation, we first suspect that the murderer's real target was not Zhang Xiaoyuan, but Liang Liyun.

The reason for this suspicion is that she had a relationship with Zhang Xingbao back then, and Zhang Xingbao was so suspicious back then, and now he was diagnosed with blood in the car he drove. We directly think that he had turned into hatred because of love. On the night of the wedding banquet, Deputy Secretary Bi first sent home and then returned to the near the seafarer club to commit the crime.

As a result, the investigation found that they had a good relationship at that time. The breakup happened one year after the incident, and Zhang Xingbao first proposed the breakup. According to Liang Liyun's recollection, the reason for the breakup he proposed at that time was really untenable. He said that he had transferred to the Public Security Bureau, the salary was low, the salary was not good, and he had no future, so he didn't want to delay her."

"It's untenable."

An old cadre lit a cigarette and pondered: "He drove for Secretary Bi. He couldn't go to any unit. If others have no future, he wouldn't have no future."

"Liang Liyun thought he had changed his mind and married a British seaman after breaking up. Although his household registration was not cancelled, he is now a British citizen. The cultural differences between the East and the West were too great. The decision to marry at that time may have something to do with the breakup. He was not very happy. He divorced his husband five years ago and opened a small restaurant in the UK alone."

Women like to listen to gossip, but leaders like to listen to it too.

The problem of the cold situation was solved, and Zhou Suying continued: "She was not happy, and Zhang Xingbao was not happy. He is still single and has never been married. His family and branch leaders and colleagues have introduced him many times, but he declined it with various excuses. Many people think that he has suffered some injuries on the battlefield, has physical problems, cannot have children, and dare not get married.

Judging from the current situation, he was not changing his mind and had no health problems. He was worried that the police investigating the 12/26 case would find him one day, and he could not prove his innocence, and he was worried that it would impair his family and his wife and children as a result."

If this case really has nothing to do with him, the police officer who is about to be tested on the screen is really a man.

Unfortunately, he had concealed important situations and was not responsible for legal responsibility. However, he was obviously not suitable to wear this police uniform. Director Chen sighed secretly and focused on the LCD screen.

As Zhou Suying said, the technical police felt that Zhang Xingbao's mental state was now available for testing. On his body, wrist, and finger links, he looked at the laptop screen, confirmed that the device was normal, and started asking questions.

"Have you ever been to the East China Sea?"

“Have been.”

"What do you do?"

"Police, police officer."

When a person tells the truth, the brain only needs to listen and speak. There will not be much time to actively think, and the data fluctuations detected by the instrument will not be obvious. But if you lie, the brain needs to do is listen, think, and say this process, although very short, can be accurately captured by the lie detector.

Just now, these are carefully designed "standard" questions. When answering these questions, the subjects will generally answer with or without a calm answer. The physical indicators when answering these questions will be used as general indicators for the subjects being tested.

Then ask questions related to the case. If the tester's heartbeat, breathing, blood pressure and other values ​​change drastically when answering, and the indicator is higher than the indicator of the "standard" question, it may be lying.

After asking a few questions that are not painful, he responded calmly without thinking.

The lie detective suddenly asked: "Have you ever lie on some major issues?"

"No...yes!"

“Sure or not?”

"have."

"Why did you kill Xunli?"

"No, I didn't kill Xunli!" Zhang Xingbao's decisive voice was much higher than when he answered the previous questions.

The lie detective looked at the laptop and asked again: "What's your name?"

"Zhang Xingbao."

Yesterday, when we studied the case for one day, two young lie detectors designed a total of 5 groups of 10 questions. In the next 45 minutes, we repeatedly asked questions that were not related to the case, such as "what are you named?" and "what are you doing?" and other related questions interspersed with questions such as "why did you kill Xunli", "who was killed by Xunli".

The graph shows that whenever he answers related questions, his heartbeat did not significantly accelerate, his blood pressure did not increase significantly, and the fluctuations in his physiological characteristics were not very severe, which shows that he was not guilty.

No one wants his colleagues to be the murderer!

After asking the last question, the technical policeman showed a knowing smile, got up and shook his head at the camera, then took off the sensor, and began to clean up the equipment.

The results of lie detection cannot be used as evidence, but can be used as an important reference for whether the suspect is related to the case.

Inferring that's right, Han Bo also breathed a sigh of relief and pointed to the screen and introduced: "Dear leaders, now are Comrade Tian Guogang and Comrade Wu Changcheng, the police officers in the special task force, who are in charge of the case. The old director may have an impression that they participated in the 12.26 case that year, and they will be responsible for inquiring next."

The old comrade asked the old policeman that this was the best arrangement. Director Chen nodded with satisfaction.

In the psychological test room, Tian Guogang and the other sat in front of Zhang Xingbao, one asked questions and the other took notes.

Zhang Xingbao was not very familiar with Lao Tian, ​​and was so familiar with Lao Wu that he could not be more familiar with him. He suddenly saw him a little surprised. He subconsciously touched his pocket and took out a cigarette to his mouth. He found that there was no ashtray on the table and the environment in the room was so good that he could only put down the cigarette.

"If you want to, just suck."

After misunderstanding that he had been so many years, Old Wu felt a little guilty and put down his paper and pen and went out to find an ashtray.

The leader was watching in the conference room. Tian Guogang did not dare to waste time and said bluntly: "Comrade Zhang Xingbao, I am Tian Guogang, a policeman of the 12.26 case task force. You know Comrade Wu Changcheng, so there is no need to introduce it. We will ask you in accordance with the instructions of the superiors and the case handling procedures. Please answer every question truthfully."

"yes."

"On the evening of December 26, 1990, where did you go after sending Deputy Secretary Bi of the Municipal Party Committee back? What did you do?"

"Go to the seafarers club and pick up your girlfriend from get off work."

"What's your girlfriend's name?"

"Liang Liyun."

"Have you received it?"

"No."

"Why didn't you receive it?"

This incident was so impressive that I remembered it almost every day in the past eleven years, so I really thought it was done by myself for a while.

Recalling the bloody scene that night, Zhang Xingbao took a puff of cigarette and said solemnly: "When he drove to the near Huafeng Machinery Factory on Changgang South Road, he found a man lying on the ground, struggling in pain, and the ground was covered with blood. I have been a soldier, fought wars, and had been in the cat's ear piercing for more than half a year, and worked in the municipal party committee. How could I not save you when I die?

I didn't think much about it at that time, so I stopped the car to save the person. My first reaction was to stop the bleeding. I didn't have a first aid kit at hand, so I could only use her scarf to tie her. After tying it, I recognized her as Secretary Li's lover. I didn't have a cell phone at the time and there was no one around. I called out several times that there was no one, so I could only carry her into the car and planned to take her to the hospital immediately.

When I put her flat in the back row and was about to close the car door, her head suddenly dropped down. I had seen a dead person. A comrade in the front line of Laoshan fell into my arms, stretched out his hand to breathe, and no longer breathed! Touching her neck and wrists, no more pulse!

Comrade Tian Guogang, Lao Wu, please believe me, it was not me who killed me, it was really not me who killed me. Xun Li and I have no grudges, and I have no conflicts with Secretary Li. Why did I kill her? I really wanted to save people at that time. I was a veteran, a party member, and a driver of the small car train in the municipal party committee. I have the obligation and responsibility to save her..."

"What happened later?"

"She died, and I suddenly thought of a question, who was so cruel and who did it? The person was unable to save him, and the murderer didn't see the shadow. Instead, my hands, body, and car were covered with blood. When the police asked me what I said, I will tell the truth that the police would believe it?"

A man doesn’t cry easily, but he hasn’t reached the sad place.

Zhang Xingbao burst into tears and wiped his tears: "Only those who have been on the battlefield and experienced the war know how precious life is. I am not afraid of you two jokes. When I came down from the front line, my legs were weak. Not only me, but all of us are in the class. If we don't choose to retire and stay in the army, we all can help us who can save our lives, but we didn't stay, and we just want to go home for a few days of safe life.

I am afraid of death, and even more afraid of unjust death!

I died on the battlefield, Zhang Xingbao, a hero and a martyr. Although my parents were sad, they were glorious. The government would help them with their elderly care for me. I have heard people tell me how the police handled the case. If the murderer is not caught, I will be the murderer. If I was shot as a murderer, would I be wronged or not? What should my parents do?"

He burst into tears after he had been in his heart for more than ten years.

Han Bo felt bad, so he hurriedly used the walkie-talkie to send a pack of tissues to the police downstairs.

After waiting for two or three minutes, when his mood eased a little, Tian Guogang then asked, "What about later?"

"The more I think about it, the more I feared it. I dared not send someone to the hospital, and I dared not call the police. I remember there was a trash can behind me, so... I put her in the trash can. I am sorry to Secretary Li. She is so beautiful, so young, and so nice, and she shouldn't be lying in such a dirty place.

Thinking of the blood on my hands and on the car, I took off my scarf and wiped it first, but didn't dare to go to the seafarer club again. I drove the car home, found a poke, went to the river to fetch water to wash the blood, opened the car door to ventilate and scattered the smell of blood, sprinkled flower dew to cover it, and I was busy all night."

"Then I thought about it later, I became more and more scared. I couldn't help but wonder if anyone saw me when I got off the car, if anyone saw me when I was carrying her into the car, if there would be wheel marks on the ground, and I had nightmares every day, and I felt like a murderer. You found me again, asked me where I went that night, and checked the car while I was not paying attention.
Chapter completed!