Zhou Ning dialed Zhou Xiaoyu's phone, and a female voice came from the phone.

"The phone you dialed has been switched off or is out of service area."

After hanging up the phone, Liu Yongxin patted Zhou Ning's arm.

"Don't be anxious, caring will lead to chaos. Maybe Xiaoyu is in class, and my wife has a classmate from No. 1 Middle School. I'll ask her if Cui Guanglin went to school today to find out more."

Liu Yongxin went to make a call, and Zhou Ning walked to the window and dialed the second aunt's number directly.

"Where is the second aunt at work?"

"Well Xiaoning, why did you call me?"

"It's okay. Xiaoyu and I chatted for a long time last night. I just wanted to ask if you didn't talk about her again last night. How was her mood?"

The second aunt snorted.

"She came back later than us. She said she would walk back with you. Uncle Qi persuaded me, but I didn't say much. She left without eating this morning. She left very early and didn't talk about anything else.

.”

"I went to school today. Are there any classes?"

"You kid, are you stupid at work? Their high school boarding system allows them to have two days off every two weeks. This week is not a big day off. They even asked for leave on Friday night."

"I was busy and forgot. I just wanted to ask, Second Aunt, don't worry too much. Don't worry, Xiaoyu is not a willful child. She understands your worries."

"Okay, don't try to persuade me. I know you are a good kid, so I didn't say anything. You can try to persuade her more. I have to pass the class first!"

After hanging up the phone, Liu Yongxin had finished contacting him and was talking to Xu Dayuan when Zhou Ning hurried over.

"Cui Guanglin returned to school last night. Zhou Xiaoyu and the others didn't see him, but they sent someone to the Chinese Teaching and Research Office to look for him."

A bad premonition made Zhou Ning's fingers feel cold, and Xu Dayuan waved his hand.

"Don't wait, go directly. I'll talk to their school leaders on the way."

Several people went downstairs. Xu Dayuan had already summoned several people from the criminal police team, and the two cars drove quickly towards No. 1 Middle School.

Zhou Ning kept calling Zhou Xiaoyu's cell phone all the way, but no one answered. Zhao Ning saw Zhou Ning's actions from the corner of his eye and stepped on the accelerator even harder.

Ten minutes later, we arrived at the gate of No. 1 Middle School.

Xu Dayuan had already contacted the principal, so the guard did not stop him. The car drove straight in and parked directly in front of the office building. When he got off the car, he saw several teachers waiting there. Xu Dayuan walked directly towards the older man.

"How is Principal Bai? Have you found anyone?"

Principal Bai also had an anxious look on his face, pointing to the office building behind him and said:

"After receiving your call, I sent someone to look for him. I searched the office building and the classroom where they teach, but I didn't see anyone. I just asked two teachers to go to all the bathrooms to look for him, but he hasn't come back yet."

"Do they have classes in the morning? Are classes going on normally?"

"Teacher Zhou has no class in the morning and has two classes this afternoon. As for Teacher Cui, she went to their Grade 2 and Grade 3 classes in the morning and attended the first class, but she didn't see anyone after that."

Zhou Ning grabbed Xiao Qu and stepped forward directly.

"Check the surveillance camera. Let Xiaoqu do it. He's fast."

Xu Dayuan naturally agreed.

"Is the guard monitoring the surveillance?"

Principal Bai nodded.

"Let the security chief take you there."

Da Zhao waved his hand.

"Hurry up and the security chief and Xiaoqu get in the car. Let's go check the surveillance. Do you know Zhou Xiaoyu and Cui Guanglin?"

"know."

Several people got into the car, turned around and drove towards the guard.

Principal Bai pulled Xu Dayuan and asked in a low voice:

"I said, when looking for someone in school, we still need to reduce panic. Can you tell me what it is?"

Xu Dayuan shook his head.

"I don't want to cause panic, but things are a bit special. You also know that I am from the criminal police team. I can't tell you the details of the case. You just need to cooperate with us to find someone. Are all the teachers in the office building now?"

Principal Bai was choked and paused for a moment, but he also knew that if the matter was not serious, Xu Dayuan would not ask so mercilessly.

"There are still ten minutes left. The bell is the end of get out of class at 11:40. I have just informed all the teachers to gather in the multi-purpose hall on the second floor."

Xu Dayuan nodded, gave some instructions to He Chunyang, and the others quickly dispersed, and then he said to Principal Bai:

"Principal Bai, please go to the multi-purpose hall first and find a teacher to take me to Cui Guanglin's office. Also look for the floor plan of the school and ask the teacher with the key to follow. My people will check all corners of the school. Forensic Doctor Liu, please follow.

A teacher, go and have a look at the staff dormitory."

Liu Yongxin knew what this meant. One was to see if anyone was hiding, and secondly, if there was a dormitory, he could search for things like hair or toothbrushes. These could all be used to extract DNA. If something really happened, this could be compared.

Zhou Ning nodded to him, and Liu Yongxin carried a survey box and followed the teacher.

Zhou Ning followed Xu Dayuan to the third floor of the office building. The names of various teaching and research offices were hung on the door plates, but this third floor seemed to be the teaching and research offices of the second-year high school department. When they reached the end, it said the high-school chemistry teaching and research office.

Pushing the door open, there were two teachers inside. When they saw someone coming in, they naturally looked over. Xu Dayuan had already raised his ID without the introduction of the accompanying teacher.

"I am Xu Dayuan from the Criminal Police Team. Please put down your work and answer a few questions. Have you seen Cui Guanglin this morning?"

An older female teacher stood up directly, nodded and said:

"5:40 is the time for morning self-study. When I arrived at the teaching and research office at 5:35, I happened to see Teacher Cui going out with a thermos cup. I looked in the direction of the west building, which is their Grade 2 and Grade 3 classes."

Another male teacher then said:

"After the first period of get out of class, I went back to the teaching and research office with Teacher Cui. He tidied up the desktop, then took the car keys and went out. He didn't say where he was going. Principal Bai just called to ask, and I have already said it again."

"Do you know what kind of car he drives?"

"Teana, silver gray 2010 model, cost 240,000, and took delivery of the car for a month."

Zhou Ning didn't wait for the teacher to speak and spoke directly.

The teacher nodded and looked at Zhou Ning as if somewhat surprised.

"Yes, it's Teana. The interior of the top trim is all leather, but how did you know?"

"I am Zhou Xiaoyu's brother. Have you seen Zhou Xiaoyu this morning?"

Both of them shook their heads, as if they had figured out something, and the male teacher said quickly.

"After the first class, when I met Teacher Cui, I asked him, how was it when meeting the parents last night? Did they set a date? Teacher Cui just smiled and didn't see any special emotions.

He left in a hurry, so I didn’t ask any questions."

Zhou Ning walked to the table with Cui Guanglin's sign on it. The tabletop was very neat. Although there were several piles of homework books and papers, there were not even a single crease. The thermos cup was also empty, with no water droplets outside.

Zhou Ning opened the survey box, picked up the thermos cup with gloves, and scanned it. There was not a single fingerprint on it. This discovery made him even more panicked. Would a normal person avoid leaving fingerprints by swiping the cup?

Then the brush swept across the table, and traces of wiping appeared. Zhou Ning opened all the drawers and saw a bottle of 75% alcohol solution in the bottom drawer. He leaned over and smelled the table and looked at Xu Dayuan.

"The tabletop and all items have been carefully cleaned, and there are no fingerprints left. Such cleaning is meaningless unless there is a special smell or blood stains on the hands."

The last two words were spoken by Zhou Ning through clenched teeth. At the same time, he grabbed the luminol reagent in the survey box and sprayed it towards the table and thermos cup.

A crescent-shaped fluorescent trace appeared at the bottom of the thermos cup and on the table. Zhou Ning lifted the thermos cup and found that the fluorescent spot at the bottom of the thermos cup was sunk in. This should be the blood stained by the impact.

Zhou Ning's fingers were already trembling a little, so he quickly collected the sample with a cotton swab, and put the thermos cup into the evidence bag.

Xu Dayuan directly dialed Da Zhao's mobile phone, and the other party connected almost instantly.

"Xuda, we quickly checked the surveillance. Cui Guanglin's car entered the campus at 8:30 last night and was in the parking lot on the west side untouched. Zhou Xiaoyu arrived at the campus gate at 7:30 this morning.

We have been looking for just now, but we have not found the two people or Cui Guanglin's vehicle that has left the school gate. Even if there is a vehicle that has gone out, we have not found any trace of the two people on it."

"That is, confirm that they are all on campus?"

"Yes, it is confirmed that they have not left the campus. The north gate of the school cannot be opened. There are anti-crawling nets on the high walls around it, and they are all covered with surveillance cameras. It is impossible to leave quietly. Even vehicles entering and exiting the cafeteria are strictly unpacked here.

Check, and they are all facing the surveillance, there is nothing missing.”

After getting this answer, Xu Dayuan breathed a sigh of relief. As long as he did not leave the school, at least the scope was limited. He immediately dialed a number, reported the things here, and mobilized manpower.

At this moment, the female teacher's cell phone rang. She looked at Zhou Ning and pointed at the cell phone, asking Zhou Ning if she could answer the phone. Zhou Ning glanced at the word "Principal Bai" on it, and waved his hand to signal to the girl.

The teacher answered.

The female teacher was quite smart and answered the phone hands-free. Principal Bai on the other side of the phone shouted urgently without waiting for the female teacher to speak.

"Team Xu's phone number couldn't be reached. Teacher Sun told the police that Teacher Cui had been found. No, Teacher Cui had already come to the multi-purpose hall."

Xu Dayuan heard the movement and quickly came over and grabbed the phone.

"Tell me again, where is he?"

Thanks to Zhu Xin C for the tip!
Chapter completed!