Zhou Ning dialed Zhou Xiaoyu's number and a female voice came from the other end.
"The number you dialed is powered off or out of service."
After hanging up the phone, Liu Yongxin patted Zhou Ning's arm.
"Don't worry. Worrying too much can lead to confusion. Maybe Xiaoyu is in class. My wife has a classmate who is in No. 1 Middle School. I'll ask her to see if Cui Guanglin went to school today and get some information from the side."
Liu Yongxin went to make a phone call, and Zhou Ning walked to the window and dialed his second aunt's number directly.
"Is Second Aunt at work?"
"Well, Xiaoning, why did you call me?"
"It's okay. I talked to Xiaoyu for a long time last night, so I wanted to ask you guys how she felt after we went back home last night. I guess you didn't talk about her anymore?"
Second Aunt snorted.
"She came back later than us. She said she walked back with you. Your second uncle persuaded me, but I didn't say much. She left this morning without eating. She left very early, and we haven't talked about anything else yet."
"You went to school today. Did you have classes?"
"You kid, are you stupid at work? They have a boarding high school, so they have two days off every two weeks. This week is not a big break, and they all asked for leave to come out on Friday night."
"I was so busy that I forgot. I just wanted to ask. Don't worry, Second Aunt. Don't worry, Xiaoyu is not a willful child. She understands your concerns."
"Okay, stop trying to persuade me. I know you're a good kid, and I didn't say anything. Just try to persuade her. I have classes to attend first!"
After hanging up the phone, Liu Yongxin had also finished contacting him and was talking to Xu Dayuan. 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 Language and Literature Teaching and Research Office to look for him."
A bad premonition made Zhou Ning's fingers feel a little cold, and Xu Dayuan waved his hand.
"No need to wait, just go there. I'll talk to their school leaders on the way."
Several people went downstairs. Xu Dayuan had already gathered several people from the criminal police team, and 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. Big Zhao saw Zhou Ning's actions out of the corner of his eye and stepped on the accelerator .
After more than ten minutes, we arrived at the gate of No. 1 Middle School.
徐达远已经跟校长联系过，所以门卫没有阻拦，车子长驱直入，直接停在办公楼前，一下车就看到几个老师等在那里，徐达远直接奔着那个年长的老头走去。
"How is Principal Bai? Did you find the person?"
Principal Bai also had an anxious look on his face. He pointed to the office building behind him and said:
"After receiving your call, I asked people to look for him. We searched the office building and the classroom where he teaches, but we didn't see him. I just asked two teachers to search all the restrooms, but he hasn't come back yet."
"Do they have classes in the morning? Are they going to class normally?"
"Teacher Zhou didn't have classes in the morning, but has two classes this afternoon. As for Teacher Cui, she went to their Grade 2 and Grade 3 class this morning and taught the first class. She hasn't been seen since."
Zhou Ning pulled Xiao Qu and walked straight forward.
"Let's check the surveillance. Let Xiao Qu check it. He's fast."
Xu Dayuan naturally agreed.
"Is the surveillance at the gate?"
Principal Bai nodded.
"Let the chief of security take you there."
Da Zhao waved his hand.
"Hurry up, Chief Security and Xiao Qu, get in the car. Let's check the surveillance. Do you know Zhou Xiaoyu and Cui Guanglin?"
"know."
Several people got in the car and turned around and drove towards the guard.
Principal Bai pulled Xu Dayuan aside and asked in a low voice:
"I say, when looking for someone in school, we should reduce panic. Can you tell me what's going on?"
Xu Dayuan shook his head.
"I also want to avoid causing panic, but this is a special case. You know I'm from the criminal police team, so I can't tell you the details of the case. You just need to cooperate with us in finding the person. Are all the teachers in the office building now?"
Principal Bai was choked and paused, but he also knew that if it wasn't a serious matter, Xu Dayuan would not ask so mercilessly.
"There are still ten minutes left. The get out of class bell will end at 11:40. I have just notified all the teachers to gather in the multi-purpose hall on the second floor."
Xu Dayuan nodded, gave He Chunyang a few instructions, and the others quickly dispersed. Then he said to Principal Bai:
"Principal Bai, please go to the multi-purpose hall first and ask a teacher to take me to Cui Guanglin's office. Also, find the school floor plan and ask the teacher with the key to follow. My people will check every corner of the school. Forensic Doctor Liu, please follow a teacher to check the dormitory building for faculty and staff."
Liu Yongxin knew what this meant. First, it was to see if there were any Tibetans. Second, if there was a dormitory, he could search for things like hair or toothbrushes, all of which could be used to extract DNA. If there was really something, it could be compared.
Zhou Ning nodded at him, and Liu Yongxin followed the teacher, carrying a survey box.
Zhou Ning followed Xu Dayuan to the third floor of the office building. There were names of various teaching and research departments hung on the doorplates, but this third floor seemed to be all teaching and research departments of the second grade of high school. When they reached the end, it was written on it the teaching and research department of the second grade of high school chemistry.
Pushing the door open, there were two teachers inside. When they saw someone coming in, they naturally looked over. Without the accompanying teacher introducing him, Xu Dayuan had already raised his ID.
"I'm Xu Dayuan from the Criminal Police Team. Please put down your work and answer a few questions for me. Have you seen Cui Guanglin this morning?"
An older female teacher stood up and nodded and said:
"5:40 is the morning self-study time. I arrived at the teaching and research office at 5:35 and happened to see Teacher Cui going out with a thermos cup. From the direction I saw, she was heading to the west building. Oh, that's their Class 2-3 of Senior High School."
Another male teacher continued:
"After the first get out of class, Teacher Cui and I went back to the teaching and research office. He tidied up the desk, then took the car keys and left. He didn't say where he was going. Principal Bai called and asked me just now, and I told him once again."
"Do you know what car he drives?"
"Teana, silver-gray 2010 model, cost 240,000 yuan, got the car one month ago."
Zhou Ning spoke without waiting for the teacher to speak.
The teacher nodded and looked at Zhou Ning with some surprise.
"Yes, it's the Teana. The interior of the top-of-the-line model 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 something out, and the male teacher quickly spoke.
"After the first class, I ran into Mr. Cui and asked him how the meeting with parents went last night and whether a date had been set. Mr. Cui just smiled and didn't seem to have any special emotions. Seeing that he was in a hurry to leave, I didn't ask any more questions."
Zhou Ning walked to the table with Cui Guanglin's sign on it. The tabletop was very tidy. Although there were several piles of exercise books and papers on it, there was not even a crease on them. The thermos cup was also empty, with no water droplets on the surface.
Zhou Ning opened the investigation box, picked up the thermos cup with gloves on, and scanned it. There was not a single fingerprint. This discovery made him even more nervous. Would a normal person wash the cup without leaving fingerprints?
Then the brush swept across the table, leaving traces of wiping. Zhou Ning opened all the drawers and saw a bottle of 75% alcohol solution in the bottom compartment. He leaned over and smelled the table, then looked at Xu Dayuan.
"The table and all items have been cleaned carefully. There are no fingerprints left. There is no point in cleaning it this way unless there is a special smell or... blood on your hands."
Zhou Ning uttered the last two words while gritting his back teeth. At the same time, he grabbed the luminol reagent in the investigation box and sprayed it on the table and the thermos cup.
There was a crescent-shaped fluorescent mark on the bottom of the thermos cup and on the table. Zhou Ning lifted up the thermos cup and found that the fluorescent spot on the bottom of the thermos cup was sunken. This should be the blood stain caused by the impact.
Zhou Ning's fingers were already shaking as he quickly collected the sample with a cotton swab. The thermos cup was also put into the evidence bag.
Xu Dayuan directly dialed Da Zhao's cell phone, and the other party answered almost instantly.
"Master Xu, we quickly checked the surveillance footage. Cui Guanglin's car entered the campus at 8:30 last night and has been parked in the west parking lot without moving. Zhou Xiaoyu arrived at the school gate at 7:30 this morning.
We have been searching until just now, but we have not found the two of them, nor Cui Guanglin's vehicle, leaving the school gate. Even if there was a vehicle leaving, we did not find any trace of the two of them on it."
"That is, to confirm that they are all on campus?"
"Yes, we confirmed that they did not leave the campus. The north gate of the school cannot be opened. There are anti-climbing nets on the high walls around, and they are all monitored. It is impossible for them to leave quietly. Even the vehicles entering and leaving the cafeteria are strictly unpacked and inspected, and they are all facing the surveillance cameras. Nothing is missed."
After getting this answer, Xu Dayuan was relieved. As long as he didn't leave the school, at least the scope was limited. He then dialed a number, reported the situation here, and mobilized manpower.
At this moment, the female teacher's cell phone rang. She looked at Zhou Ning and pointed at the phone, asking Zhou Ning if he could answer it. Zhou Ning took a look at the three words "Principal Bai" on it. He waved his hand, signaling the female teacher to answer the call.
The female teacher was smart enough to answer the call directly on hands-free mode. Principal Bai on the other end of the phone shouted anxiously without waiting for the female teacher to speak.
"Captain Xu's phone number was unreachable. Teacher Sun told the police that Teacher Cui had been found. No, Teacher Cui was already in the multi-purpose hall."
Xu Dayuan heard the noise and hurried over and grabbed the phone.
"Tell me again, where is the person? "