Only then did Jiang Bai understand why Gu Lai was so confident.

In addition to the same advance notice as the cooks, there are also listening devices in this special classroom.

In this way, even if a student tells the truth, he will be able to know and adjust accordingly.

When he came to the toilet, Jiang Bai found a pit to go into.

"And now?"

"It's gone."

Du Yiheng said, "In this way, we should have no way to ask for news at all, and Principal Gu's arrangements are just work and rest." ”

"It seems that I can only ask Cheng Xiaoman in private."

Jiang Bai had a plan in his heart, and planned to leave the school later.

After Du Yiheng informed them that they had eavesdropped, Liu Zifeng and Yan Xiyue became more serious in their speech in the classroom.

They knew that they couldn't let Gu Lai know what they had found.

With the "hiding" of both sides, this investigation has become more and more formal, and Liu Zifeng almost always asks the same questions.

The students' answers were similar, and even the answers of several teachers in Wang Xinyu's class were very different.

I just want to create Wang Xinyu's usual popularity, but he seems to be in love recently, and then he disappeared without knowing what stimulation he received.

After Jiang Bai came back, he nodded at Liu Zifeng.

"Go ahead."

He said and sat back in his seat.

Gu Lai not only arranged these, but also mixed up with people who only had one side with Wang Xinyu among the students.

It's like a deliberate attempt to slow down their investigation.

Before three o'clock in the afternoon, the most important person came.

Cheng Xiaoman pushed open the door and walked in.

Liu Zifeng's brain was spinning rapidly, and he knew that Cheng Xiaoman should not tell the truth in this environment.

But he wanted to know Cheng Xiaoman's psychological state.

"Hello, I'm Liu Zifeng, the captain of the criminal police, and we have to ask something about Wang Xinyu. Can you answer truthfully? ”

Liu Zifeng saw Cheng Xiaoman sitting at the table, so he said. He looked at Cheng Xiaoman, paying attention to her subtle changes bit by bit.

Jiang Bai was also observing, he didn't need to be distracted by talking, he could watch Cheng Xiaoman's expression change more intently.

It is difficult for people who have not undergone "professional training" to hide their true thoughts with their expressions.

Especially Cheng Xiaoman, who was only a student.

"Okay."

Cheng Xiaoman nodded, his expression slightly flat.

"Many students say that you have been close to Wang Xinyu recently, is this true?"

Liu Zifeng said, his eyes never left Cheng Xiaoman.

Cheng Xiaoman's expression was still slightly flat, but when he talked about Wang Xinyu, his eyes unconsciously revealed a glimmer of hope, mixed with sadness.

"We don't have anything to do with each other, my grades have dropped recently, and I happened to meet him as well, so I'll talk a little bit."

Cheng Xiaoman said, his eyes were dodging, but his expression was still slightly flat.

"Do you think Wang Xinyu's disappearance may have been abducted by someone else?"

Liu Zifeng continued to ask.

Jiang Bai found that when Cheng Xiaoman heard this question, his eyes seemed to tell them, "Yes!" ”

"I don't know, I don't have much contact with him."

Cheng Xiaoman's expression began to change slightly.

It's a struggling expression that you want to say but don't dare to say.

Maybe Cheng Xiaoman himself didn't know what he was thinking, and he had unconsciously revealed it on his face.

"Okay."

Liu Zifeng nodded, pretending not to find anything, "Next question, when you met Wang Xinyu, did you find anything wrong with him?" For example, the mood is extremely low and so on. ”

His question at this time was clearly oriented.

The problem says it's down, but there are only two options: yes and no.

"I can't feel it. It's just a stranger, maybe it's a drop in grades and a feeling of depression. ”

Cheng Xiaoman was already holding back at this time, and the expression on his face was a little distorted.

Every time Liu Zifeng said Wang Xinyu, her expression became more and more tormented.

"I understand, and finally ask, how does the principal usually do you do with students?"

Hearing this question, a kind of horror suddenly appeared in Cheng Xiaoman's eyes.

But due to the torment of her expression, she didn't show much panic.

"School ...... The principal was very good to us. He is a chemistry teacher and teaches ...... Very interesting. ”

Cheng Xiaoman stumbled and said these words.

"Very well, you can go back first."

Liu Zifeng nodded and asked Cheng Xiaoman to leave.

At this moment, whether it is Jiang Bai or Yan Xiyue, or Liu Zifeng and Li Qiming, they all understand something in their hearts.

It's just that it's still under surveillance, and they can't discuss it.

There are still a few students left, and after Liu Zifeng formally asked some casual questions, the questioning at school is over.

"Can you do me a favor?"

Du Yiheng said in the headphones, "Pretend to walk around the school with your mobile phone, especially next to the principal's office? I'm going to connect to your phone camera, and I need what's going on inside the principal's office. ”

"Hmm."

Jiang Bai said quietly.

Leave the classroom, open the door and wait outside.

"How? Is there a catch? ”

Gu Lai still kept that smirk, of course he knew if he could get a clue.

"Well, the harvest is not small, thank you Principal Gu."

Liu Zifeng nodded and said, "By the way, there are some things, I want to talk to you before leaving." ”

"What's the matter?"

Gu Lai asked with some confusion.

It didn't take long for them to arrive at the principal's office.

Jiang Bai pretended to play with his mobile phone, took out the mobile phone, and looked at the mobile phone while pacing back and forth.

"It's about lectures."

Liu Zifeng also squeezed a smile as he spoke, "Safety lectures are still necessary, students can't run around, and they must pay attention to safety." I think I'll do the lecture after two days of preparation. ”

"Exam this Friday, or next week?"

Jiang Bai breathed a sigh of relief when he saw Gu Lai talking.

"Okay, Principal Gu, you can do it."

Liu Zifeng nodded, "Then let's go back first." If there is a new investigation request, you will be notified first. ”

In less than a few minutes, Jiang Bai paced back and forth with his mobile phone, and had already helped Du Yiheng get the full picture of the principal's office.

At the same time, with the signal of Jiang Bai's mobile phone, he traced the computer port of Gulai's office.

The computer in Gulai's office is not integrated with the entire school network, but is pulled separately.

Therefore, when Du Yiheng first broke through the school network, he did not find the information of Gulai's computer.

Leaving the school, everyone returned to the car.

"It's so depressing inside!"

Yan Xiyue said with a sigh of relief, "By the way, do you see that something is wrong with Cheng Xiaoman?" ”

"Well, she should want to tell the truth, but there is no way to say it, she should have been spoken by the principal in advance like other students."

Liu Zifeng analyzed.

"Well, I also feel that Cheng Xiaoman's expression is very abnormal."

Li Qiming nodded, he also felt that something was wrong.

"It's more than that."

Jiang Bai said suddenly.