Chapter 95 Three-hour window period

Zhou Ning followed Xu Dayuan and ran towards a building behind the office building. He came to a room on the third floor. The door had been opened.

The room was filled with various test instruments, and it was obvious that this was a laboratory. When Zhou Ning saw several familiar criminals squatting in a corner, he hurried forward. Zhou Xiaoyu was lying on the ground and fainted. He was covered with tape on his mouth and white tied on his hands and feet.

Zhou Ning quickly squatted down, cut off the cable tie, raised his hand and tried Zhou Xiaoyu's carotid artery. His heartbeat was normal. As his fingers passed through his hair, a blow on the back of his head was revealed, but it was just a crescent-shaped skin trauma. Such an external trauma would not cause coma.

Zhou Ning's heart was already in his throat and his eyes were a little sore.

He quickly hugged the person in his arms and gently patted Zhou Xiaoyu on the cheek, Zhou Ning called out.

"Xiaoyu, Xiaoyu wake up!"

Zhou Xiaoyu slowly opened her eyes. Seeing her eyes open, Zhou Ning's hanging heart was relieved.

"Brother, why are you here? Why am I here?"

"Do you remember what happened?"

Zhou Xiaoyu held her head and sat up, as if she was still a little dizzy now.

"I don't know, wait for Cui Guanglin, and hit me with a water cup, and while I fell down, I rushed over and covered my mouth, and then I don't remember it."

Zhou Ning checked Zhou Xiaoyu's neck again and pressed the periphery of the wound to make sure that the injury was not serious and there were no fingerprints on her neck. Seeing her lipstick rubbing a little, she quickly used a cotton swab to extract Zhou Xiaoyu's lips and nose, put it away, and then comforted her:

"Okay, everything has passed. Now let's recall, when did you meet Cui Guanglin today?"

Zhou Xiaoyu rubbed her wrists, and the marks on it were already broken. She took a breath of pain.

"I just arrived at the school in the morning and saw Cui Guanglin in the corridor of the office building. He waved his hand at me and put my bag back into the office. I felt that I was right and had to say something clearly, so I left the office and saw him at the corner of the corridor.

He said that whether he will continue to prepare for marriage or break up in the future, at least he must make it clear that there are too many people here and it is better to go to the laboratory and be quiet, so I followed him to the laboratory on the third floor of the Science and Technology Building.

But as soon as the door opened, I smashed the back of my head from behind, and then he covered my mouth and nose. I was very panicked at that time. I didn’t know what Cui Guanglin was going to do. I struggled a few times, but I didn’t have the strength to do it. Then I didn’t know anything. What’s going on with my brother?”

Zhou Ning hugged Zhou Xiaoyu who was still trembling, felt scared in her heart, patted her back and comforted her:

"Don't be afraid, brother is here. Be good, please go to the hospital for a check-up. As for Cui Guanglin, we have been caught by us, as for his affairs, the investigation here will be over later. I will tell you, Da Zhao, please help me find someone to take Xiaoyu to the hospital!"

Da Zhao had come over and helped Zhou Xiaoyu up.

"Don't worry, I'll ask Sister Feng to take Xiaoyu to the hospital. You can call Director He."

Zhou Xiaoyu grabbed Zhou Ning's hand and looked a little anxious.

"Don't tell my mom!"

"Don't worry, I won't say anything. I'll worry them if I say it, but you have to listen to me and check it out."

Zhou Xiaoyu nodded and followed Da Zhao downstairs. Zhou Ning glanced at the position where Zhou Xiaoyu had just sat on the ground. Under a table next to her was a cabinet. The doors were all open, and there were signs of rubbing and trampling inside. Zhou Ning narrowed his eyes.

"Is Xiaoyu stuffed into this cabinet?"

Xu Dayuan patted Zhou Ning on the shoulder, and he could feel Zhou Ning's anger. If it were him, he would probably not be able to control his emotions.

"It's not only that Xiaoyu is stuffed inside, but also locked it. The laboratory has searched it. The second search, I opened the cabinet and found Xiaoyu. Fortunately, I'm fine."

Zhou Ning nodded, this sentence is the key, fortunately, people are fine, if Xiaoyu has something to do, Zhou Ning doesn't know how to blame himself.

"I should have let Xiaoyu rest for a few days last night, but I was careless."

"Come on, don't be sad about spring and autumn with me. So many teachers are in the multi-purpose hall. I'll deal with it first. Cui Guanglin takes it away. Check it out here and go back to the team. Da Zhao stays to help. Actually, I don't understand why Cui Guanglin controls Xiaoyu?"

Zhou Ning shook his head, he couldn't understand this. If Cui Guanglin was really the murderer of the 3.10 case, it is likely that he might also be the murderer of the serial murder case in red. Such a person has serious obsessive-compulsive disorder and is so rigorous. The only thing missing is the fishing person, but what happened today?

Is it because of the Zhou family’s reaction?

Or, if you can't get it, you will be destroyed. When Zhou Ning thought of this, he was even more scared and took a deep breath to control his emotions.

"Xu Da, go and do it. I'll ask Xiao Qu to check the surveillance in the building. As for this, it's not difficult for a chemistry teacher to create some chemical preparations that make people feel unconscious for a short time."

Xu Dayuan waved his hand and led the people away. Da Zhao ran back quickly.

"Sister Feng took Xiaoyu to the hospital and followed the 120 car. Have you called?"

Zhou Ning took out his cell phone and called He Shancun's phone number.

"He Shancun me, Zhou Ning."

"I'm busy talking about it!"

"My sister Zhou Xiaoyu was sent to your hospital by 120. She arrived in a while and was injured in the pillow. Check for fractures and concussions. In addition, I suspected that she was dizzy. I collected her nose and edges of her lips. I don't know if there could be any residue. Please help me check Xiaoyu carefully.

According to Xiaoyu, she was stunned before eight o'clock and was awakened by me just now. If it weren't for anesthetics, then what chemical preparations could cause such a long time to fall into a coma?"

He Shancun paused, obviously shocked by Zhou Ning's words.

"What, your prospective brother-in-law did it? I remember you said last night that he was just teaching chemistry, right?"

"Well, give me a direction, I'm in their school's chemistry lab."

"Don't be anxious. As inhaled anesthetics, we often use heptaflurane and deflurane, but there are many similar flurane, enflurane and isoflurane, which can also be used as anesthetics.

I remember reading in a magazine that as long as hexafluoroisopropanol can be used to react with dimethoxymethane in the presence of a catalyst, and then add a strong acid or something, you can get sevofluorane. As long as you are a master in chemistry, these are not difficult things.

However, this thing is a gas and is difficult to store, while fluorane is a liquid with an aromatic smell, but this thing has poor stability.”

Zhou Ning was a little confused when he heard this, but he remembered these names.

"I understand. I found these chemical preparations. If Cui Guanglin's fingerprints are on it, it's fine."

"Well, that's about it. By the way, look for the trash can. If he has used something like bottles and gauze that can be discarded around, it will metabolize into hydrogen acid when it encounters light or heat, which can be tested."

"Thank you, Xiaoyu has given it to you."

After hanging up the phone, Zhou Ning looked at Da Zhao.

"Let's start looking. Cui Guanglin's fingerprint has been collected just now. We need to find the bottle and gauze in the trash can. If we find fluorane, hexafluoroisopropanol and dimethoxymethane here."

Da Zhao nodded.

"Don't worry, I heard it, and I also found out which words it was, and I started to do it!"

As he said that, he began to search on all the test benches. Zhou Ning looked and went straight to the trash can at the door. As soon as he opened it, he saw a piece of gauze and a brown glass bottle on the top. He directly clamped out the two things.

When collecting fingerprints on the brown bottle, Zhou Ning didn’t need to compare them and found that there was a mark on the edge of the fingerprint, which was obviously a trace left by the Band-Aid.

"Big Zhao, I found it!"

Da Zhao came over and put the cable tie into the physical evidence bag.

"It seems that this man was in a hurry and didn't have time to deal with these things."

Zhou Ning nodded, put all the bags of physical evidence into the survey box, and stood up.

"In the first class at 8 o'clock, Cui Guanglin led Xiaoyu here and stuffed her into the cabinet. He wasted too much time. He went to see if there were any new discoveries in Xiaoqu."

The two went downstairs and drove towards the guard. It was lunch break and many students looked at them. The police car was still too conspicuous at school.

When I came to the guard's guard room, I saw Xiao Qu wave his hand as soon as I entered.

"This Cui Guanglin seems to be very familiar with surveillance on campus. He avoided surveillance in and out of class. Even when he couldn't avoid it, he was still hidden among the students. I found a few pictures. You see, at 8:45, he went out through the side door and followed several students.

Then at 8:59, I entered the staff dormitory building, but there was no surveillance here. The guards on duty said that the floor surveillance of their faculty and staff had been broken for a long time, and I don’t know where he was during the period between 8:59 and 11:50.”

What can Cui Guanglin do during the three-hour window period?

"Let's go to the dormitory building. Master has passed."

(End of this chapter)
Chapter completed!