Chapter 406 Xiao Bing is lying
If Xiao Bing is the murderer, then he must know much more information than ordinary people. He would either deliberately conceal it and try to clear himself, or he would accidentally reveal some information.
At the same time, Zhou Yi can also observe his reaction when he speaks to see if he is lying.
There is a professional technique called micro-expression theory.
This thing didn't exist in 1997. During interrogations, it was basically the experienced police officers who judged whether the suspect was lying based on their experience.
Around 2003, a team from the Institute of Psychology of the Chinese Academy of Sciences published the first experimental paper in China to study the characteristics and recognition of micro-expressions.
Later, the department introduced the micro-expression theory from the United States and opened experimental courses in some criminal police academies.
Later, with the development of science and technology, the capture and analysis of facial micro-expressions gradually became systematic and began to be piloted in first-tier cities to assist in criminal investigations. It is said that it can accurately capture expressions such as pupil tremors and slight pursing of the lips in just 0.2 seconds.
Although micro-expressions cannot be used as evidence, they have indeed helped criminal investigators make breakthroughs in investigations in many cases.
Of course, Zhou Yi had not specifically learned this technology, but on the recommendation of his colleagues, he watched a foreign TV series called "Lie To Me".
Although the TV series is too fantastical, Zhou Yi has watched it many times because he combined it with his own criminal investigation work and found that many of the techniques in it can indeed be found in reality.
"Teacher Xiao, just tell us what you heard. It's fine. It's actually a help to us, because we really don't know how this case is being spread outside." Zhou Yi smiled casually, "After all, no matter how much the news spreads, it won't reach us."
Xiao Bing nodded and said, "Okay, but I don't know if what I said is true or not. After all, I just heard it in the office."
Zhou Yi made a gesture of invitation.
"They said that the female student who was murdered was from the School of Accounting?" Xiao Bing said, then looked at Zhou Yi and then at Chen Yan.
Zhou Yi's face remained calm.
Seeing that the two of them didn't respond to his question, Xiao Bing could only continue, "I think her name is Xu Liu, a freshman. She said the school arranged for teachers and students to identify the body, and everyone who went was terrified. I think they only saw a head."
When Xiao Bing finished speaking, there was a hint of fear on his face, mixed with some regret.
Zhou Yi had been staring at him, observing him. Seeing that he had stopped talking, he asked, "Anything else?"
"If anything, everyone is guessing who the murderer is."
"Oh? How did you guess?"
"Well, these are just baseless guesses. Some say he met some shady people outside, while others say he got into an argument and was retaliated against." Xiao Bing said seriously, "Some people like to talk about this, but I don't like to hear it. I think no matter what, death is the greatest thing, and we can't just make up stories about people."
"Besides, Officer Zhou, you will definitely get to the bottom of this matter. Every profession has its own expertise, so we have to trust you professional police officers."
After hearing these words, Zhou Yi realized that Xiao Bing was a little difficult to deal with.
He didn't reveal any flaws, and the information he gave was very little and superficial.
Moreover, he never used himself as the subject from beginning to end, but always said "they said", thus clearing himself of the issue.
Either he really just heard it from others, or he was very cautious and knew that the more he said, the more mistakes he made, so he avoided revealing any flaws.
And this last sentence, which seemed to be a compliment, actually kicked the ball back to Zhou Yi.
But Zhou Yi didn't see any sign of lying in his reaction.
He decided to take the initiative.
"Teacher Xiao, do you know the murdered girl Xu Liu?" Zhou Yi asked.
Xiao Bing shook his head and said, "I don't know him. I teach French, and the only compulsory public course in the School of Accounting is College English, not French."
"What about public electives?"
Public elective courses are a special case because they are open to the entire school and do not restrict majors.
Freshmen at Hongda can register for two public elective courses each semester, and the registration information is recorded in their student files.
In the previous life, based on archival records, the task force included the teachers of Lu Xiaoshuang's two public elective courses in the core investigation scope.
In this life, the task force also included the elective course teachers chosen by Lu and Xu in the core investigation scope.
However, among the elective courses that Xu Liu signed up for, there was no French course, but there was an International Business English course.
Xiao Bing shook his head again. "There's no such student. Actually, not many people sign up for my elective course. After all, it's not as instrumental as English. So I'm sure there's no such person as Xu Liu."
Zhou Yi took out Xu Liu's photo from his pocket and placed it on the table.
Xiao Bing's eyes immediately fell on the photo.
"Teacher Xiao, please check if you have seen the person in the photo in or near the school."
Xiao Bing looked up and asked, "Is this Xu Liu?"
Zhou Yi nodded.
Xiao Bing sighed softly: "Ah, still so young..."
"Think carefully about it."
Xiao Bing looked at the photo and thought for a while, then shook his head. "I can't say I've never met this classmate in school. After all, the school is so small. But I really don't have much impression of this classmate Xu."
When Xiao Bing was looking at the photo and talking, Zhou Yi looked at him and didn't notice any small movements or micro-expressions.
So far, Xiao Bing's performance has been very natural.
Could it be that he really knows nothing?
No, it seems I have to add fuel to the fire.
"I see. It's true that Teacher Xiao has never taught this student, so it's normal that he doesn't know him. If you remember anything later, please feel free to provide us with clues."
Zhou Yi said this as he put away Xu Liu's photo, looking like he was ready to end the conversation.
But Chen Yan knew that it was definitely not that simple.
More importantly, Xiao Bing also sat there without moving.
Zhou Yi changed the subject and said, "Teacher Xiao, have you heard that another student from the School of Accounting has also gone missing? She's from the same major and roommate as Xu Liu."
Xiao Bing was slightly stunned: "Really? That's not the case."
Lu Xiaoshuang's situation is different from Xu Liu's.
After Xu Liu's head was discovered, the inevitable thing was to identify the body and conduct an investigation around her. These things could not be concealed.
But Lu Xiaoshuang's disappearance from noon on the 30th to May 1st was during the holiday, and no one noticed it except Zhou Yi.
After rescuing the person from the mine on the night of the 1st, the school and family were not notified. It was only after the special task force was established and the murder weapon with Lu Xiaoshuang's fingerprints was found that Wu Yongcheng proposed that for the confidentiality of the case, only the school leaders should be informed, and the school should arrange for the counselor to make up for Lu Xiaoshuang's long vacation.
Although Lu Xiaoshuang's request for a long vacation at this time might arouse suspicion from those around her, at least no one except the counselor and Mo Youyou would care too much.
So theoretically, no one should make a strong connection between Lu Xiaoshuang's "leave" and Xu Liu's murder. Even if someone occasionally thinks of it, there is no channel to confirm the information.
It's normal that Xiao Bing, who is not from the same college, doesn't know.
But the problem is that Xiao Bing's micro-expressions have changed.
Zhou Yi discovered that he was blinking much faster than before.
In micro-expression studies, this is a reaction when a person begins to feel nervous.
Zhou Yi continued, "And you also know this missing person."
"I know him?" Xiao Bing was startled. After thinking for a moment, he asked, "Could it be Lu Xiaoshuang?"
Zhou Yi observed that when Xiao Bing said this, his eyes moved quickly to the right.
This made Zhou Yi feel a little strange. Micro-expression studies say that when people lie, their eyes will move to the upper right, because the left brain will be active when making up lies.
But what's there to lie about?
Zhou Yi neither denied nor admitted Xiao Bing's question.
"How long has classmate Lu Xiaoshuang been missing?" Xiao Bing asked.
"Teacher Xiao, when was the last time you saw Lu Xiaoshuang?" Zhou Yi asked back.
"Noon on the 30th."
Xiao Bing's answer made Zhou Yi's heart skip a beat.
"What time exactly? Where?"
"It was downstairs in Teaching Building No. 6. I had just finished class and was heading back to the office when I ran into Lu downstairs." Xiao Bing said calmly, "I didn't see the exact time, but my class ended at 12 o'clock."
"What did you talk about at that time?" Zhou Yi leaned forward and asked in a deep voice.
As if feeling the pressure from Zhou Yi, Xiao Bing leaned back involuntarily and said, "I didn't say anything, just said hello. Oh, I also casually asked why I hadn't seen Officer Zhou recently. Classmate Lu said you were on a business trip."
After saying that, Xiao Bing reached out and scratched the tip of his nose.
At the same time, the eyeballs moved quickly to the right.
Zhou Yi was immediately shocked. Xiao Bing was lying!
When people lie, their faces quickly become congested, causing the nose to swell and itch, so they subconsciously touch their noses to relieve this condition.
Before this, Xiao Bing had never touched his nose, but when he mentioned what he had said to Lu Xiaoshuang, he touched his nose for the first time.
This means that it was true that he met Lu Xiaoshuang at noon on the 30th, and he did not hide it.
But as to what he and Lu Xiaoshuang said, he might have lied!
Moreover, Zhou Yi seemed to have discovered that his two consecutive rapid eye movements to the right were not a sign of lying.
Instead, he was looking at something to the right.
Chen Yan also caught this reaction.
He was standing nearby, keeping a distance.
While Zhou Yi was questioning, Xiao Bing's attention was completely focused on Zhou Yi. He began to observe the situation everywhere, mainly to find things related to the modus operandi of this case: a knife, oil and a pot.
He caught it the first time Xiao Bing's eyes moved.
But he felt a little strange, because from this angle Xiao Bing was looking at him.
He thought it was a reaction to the other person's inner nervousness.
The second time, Xiao Bing's gaze was still focused on himself.
But something wasn't right.
Suddenly, he and Zhou Yi both understood.
Xiao Bing was not looking at Chen Yan.
But it was the door to the inner room that was blocked by Chen Yan!
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