novice forensic medicine

Chapter 95 The Three-Hour Void Period

Zhou Ning followed Xu Dayuan, ran towards a building behind the office building, came to a room on the third floor, and the door was already opened.

The room is full of various experimental instruments. Obviously this is a laboratory. Seeing a few familiar criminal police squatting in a corner, Zhou Ning hurried forward. Zhou Xiaoyu was lying on the ground and passed out, his mouth was taped , with white cable ties tied on his hands and feet.

Zhou Ning quickly squatted down, cut off the cable tie, and raised his hand to test Zhou Xiaoyu's carotid artery. His heartbeat was normal. As his fingers passed over his hair, a blow wound on the back of his head was revealed, but it was only a crescent-shaped skin trauma. , such a trauma, will not be in a coma.

Zhou Ning's heart had reached his throat, and his eye sockets were a little sore.

Hugging him in his arms quickly, and gently patting Zhou Xiaoyu's cheek, Zhou Ning called out.

"Xiaoyu, Xiaoyu wake up!"

Zhou Xiaoyu slowly opened his eyes, seeing her open them, Zhou Ning let go of his hanging heart.

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

"Do you remember what happened?"

Zhou Xiaoyu supported his head and sat up, as if he was still a little dizzy.

"I don't know, wait for Cui Guanglin, he hit me with a water glass, and when I fell, he jumped up and covered my mouth, and then I don't remember."

Zhou Ning checked Zhou Xiaoyu's back neck again, and pressed around the wound to make sure that the injury was not serious, and there were no fingerprints on her neck. Seeing that her lipstick was a little rubbed, she quickly used a cotton swab to extract Zhou Xiaoyu's lips and nasal cavity, After putting away the cotton swab, he comforted me:

"Okay, everything is in the past, now recall, when and where did you meet Cui Guanglin today?"

Zhou Xiaoyu rubbed her wrist, some of the strangle marks on it had been broken, she took a deep breath in pain.

"I just arrived at the school in the morning, and I saw Cui Guanglin in the corridor of the office building. He waved at me. I put the bag back in the office. I thought what you said was right, and I needed to make something clear, so I left the office. position to see him.

He said, no matter whether we continue to plan to get married in the future or stop, we must at least make it clear that there are too many people here, and we should go to the laboratory to be quiet. I followed him to the laboratory on the third floor of the Science and Technology Building.

But as soon as the door opened, he hit the back of my head from behind, and then he covered my mouth and nose. I was very panicked at the time, not knowing what Cui Guanglin was going to do. I struggled a few times, but I was exhausted, and then I didn’t know anything. Alright, brother, what's going on? "

Zhou Ning hugged Zhou Xiaoyu, who was still trembling, feeling scared for a while, patted her on the back, and comforted her:

"Don't be afraid, brother is here. Be good, go to the hospital for an examination with your colleagues first. As for Cui Guanglin, we have already caught him. As for his matter, after the investigation here is over later, I will tell you, Da Zhao, help me Find someone to take Xiao Yu to the hospital!"

Da Zhao has already come over and helped Zhou Xiaoyu up.

"Don't worry, I'll ask Sister Feng to take Xiao Yu to the hospital, and you can call Director He."

Zhou Xiaoyu held Zhou Ning's hand, with a look of anxiety on his face.

"Don't tell my mother!"

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

Zhou Xiaoyu nodded and followed Da Zhao downstairs. Zhou Ning glanced at the place where Zhou Xiaoyu was sitting on the ground just now. Under the next table was a cabinet with all the doors open. There were traces of rubbing and trampling inside. Ning narrowed her eyes.

"Xiao Yu was stuffed into this cabinet?"

Xu Dayuan patted Zhou Ning's shoulder. He could feel Zhou Ning's anger. If it was him, he might not be able to control his emotions.

"Not only did Xiaoyu stuff it in, but also locked it. The laboratory has been searched once, and the second time I searched, I opened all the cabinets and checked to find Xiaoyu. Fortunately, he is all right."

Zhou Ning nodded, this sentence is the key, luckily he is fine, if something happens to Xiao Yu, Zhou Ning doesn't know how to blame himself.

"I should have let Xiaoyu rest for a few days last night, it was my carelessness."

"Come on, don't be sad with me. There are so many teachers in the multi-purpose hall. I will deal with them first. Cui Guanglin will take them away. You can check them here and go back to the team. Da Zhao will stay and help. Actually, I don't understand, why did Cui Guanglin control Xiaoyu?"

Zhou Ning shook his head. He couldn't understand this point. If Cui Guanglin was really the murderer of the 3.10 case, there is a high probability that he was also the murderer of the Hongyi serial murder case. Such a person has severe obsessive-compulsive disorder and is so rigorous. Dulou is a fisherman, but what happened today?
Is it because of the reaction of the Zhou family?
Still, if you don't get it, you will be ruined. Thinking of this, Zhou Ning is even more afraid, so he takes a deep breath to control his emotions.

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

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

"Sister Feng sent Xiaoyu to the hospital, followed the 120 car, did you call?"

Zhou Ning took out his mobile phone and dialed He Shancun's number.

"He Shan keep me Zhou Ning."

"Say something, I'm busy!"

"My sister Zhou Xiaoyu was sent to your hospital by the 120, and she will arrive in a while. She was injured by a blow to the occipital area. Check for fractures and concussions. In addition, I suspect that she was fainted. I collected her nasal cavity and the edge of her lips, but I don't know. If there is any residue, please help me to check it carefully for Xiaoyu.

According to what Xiao Yu said, she was stunned before eight o'clock, and was just awakened by me. If it wasn't an anesthetic, then what chemical agent could cause such a long-term coma? "

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

"What, did that brother-in-law of yours do it? I remember you said last night that he teaches chemistry, right?"

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

"Don't worry, as inhalation anesthetics, we commonly use sevoflurane and desflurane, but there are also many similar halothane, enflurane, and isoflurane, which can also be used as anesthetics.

I remember reading in some magazine that as long as hexafluoroisopropanol and dimethoxymethane can be reacted in the presence of a catalyst, and then some strong acid is added, sevoflurane can be obtained. As long as you are a master of chemistry , these are not difficult things.

But this thing is a gas, so it is not easy to preserve, and halothane is a liquid with an aromatic taste, but this thing is not stable. "

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

"Understood, I found these chemical preparations, if there are Cui Guanglin's fingerprints on them, it will be fine."

"Well, that's pretty much what it means. By the way, look for it in the trash can. If he's used it, at least he can throw away things like bottles and gauze around. These things will be metabolized into hydrohalic acid when exposed to light or heat. This can be tested."

"Thank you, Xiao Yu will leave it to you."

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

"Let's start looking. Cui Guanglin's fingerprints have been taken just now. We need to look for the bottles and gauze in the trash can. If we find halothane, hexafluoroisopropanol and dimethoxymethane here."

Da Zhao nodded.

"Don't worry, I've heard it, and I've also searched for those words, let's get started!"

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

Fingerprints were collected on the brown bottle. Without comparing Zhou Ning, he found that there was a mark on the edge of the fingerprint, which was obviously a mark left by a Band-Aid.

"Big Zhao, I found it!"

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

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

Zhou Ning nodded, put all the evidence bags into the investigation box, and stood up.

"In the first class at [-] o'clock, Cui Guanglin led Xiaoyu here, and put her in a cabinet. Too much time has been wasted. Let's go to Xiaoqu's place to see if there are any new discoveries."

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 in the school.

When he came to the guard room of the guard, he saw Xiao Qu waving his hand as soon as he entered.

"This Cui Guanglin seems to be very familiar with the surveillance in the campus. He avoids the surveillance in and out of class. Even when he cannot avoid it, he hides among the students. I found a few pictures. Look here at 8:45. He came from the side door. Go out and follow a few students.

Then at 8:59, I entered the staff dormitory building, but there was no surveillance here. The guard who was on duty just now said that the floor surveillance of their faculty and staff had been broken for a long time. where. "

What can Cui Guanglin do during the three-hour window?
"Let's go, let's go to the dormitory. Master has already passed."

(End of this chapter)