Ten minutes later.

Zhou Ning came to the third floor of the staff dormitory building, Liu Yongxin was waiting on the second floor, and he hadn't found this floor yet, after all, Cui Guanglin was a person with a very low sense of existence, and he was originally searching for Zhou Xiaoyu here.

Seeing Zhou Ning coming, he hurriedly followed upstairs, there was no one in the dormitory.

"Open the door and we'll take a look."

The guard said with an embarrassed look on his face and spread his hands.

"It's not that we don't cooperate, the teacher's dormitory keys are in their personal hands, just now this old man checked, we are all looking at a dormitory to find someone to open a door."

Liu Yongxin nodded.

"I checked a few dormitories downstairs, but I needed to contact the teacher to open the door, but everyone was in the multi-purpose hall, so I couldn't find Cui Guanglin's dormitory."

"How many teachers are in this room?"

Zhou Ning glanced at it and saw that there were two bunk beds in the dormitory, according to the furnishings, there were bedding on the three beds, obviously in addition to Cui Guanglin, there were two teachers living here.

As he was talking, a male teacher came over, held the key and said:

"I've got the key!"

Zhou Ning glanced at it, this person was the teacher he had met in the chemistry teaching and research department just now.

"Let's check first, if there is any dangerous item hidden, it will be safe for you to find it."

The teacher smiled.

"I understand."

Saying that, the door opened, Zhou Ning and Da Zhao approached the room with the survey box, some liquid was sprinkled on the ground and the edges were bubbling, Zhou Ning squatted down and did not rush over, but stopped Da Zhao, found a test strip and dipped it in the liquid.

The test strip was thrown down, and it was directly carbonized, turning into a black color, and the teacher covered his mouth and exclaimed.

"Sulfuric acid, this is concentrated sulfuric acid!"

Zhou Ning nodded, the chemistry teacher is still amazing, and he can guess what substance it is when he sees this.

However, the splash area of the liquid is not large, Zhou Ning looked towards the source, and a brown glass bottle was broken in the corner of the room, obviously the sulfuric acid bottle fell, and the liquid spilled out, but this thing can be placed in the bedroom, which makes Zhou Ning a little afraid.

"Da Zhao looked for a special physical evidence box, picked up the bottle fragments, and was careful not to touch the liquid, and the gloves did not touch it."

The flesh on Da Zhao's face trembled, and he hurried up, packed the pieces into a glass box, and then carefully closed the lid.

"Which bed and cabinet belong to Cui Guanglin?"

The male teacher pointed to a bed by the window and said:

"The bed, the cupboard by the window, and the desk are his."

Zhou Ning walked over, the bed was very tidy, not to mention the hair, even there was not a single wrinkle on the sheets, the mattress was lifted, there was nothing hidden underneath, and the cabinet was even more empty when it was opened, just a basin for washing, with toothpaste, toothbrush and soap in it.

Zhou Ning didn't give up, there was a broken sulfuric acid bottle at the door, obviously it was too late to clean up, and it was so clean here, was it because someone came and disturbed him?

No, something must have been missing.

But the room is so big, everything is clear at a glance, Zhou Ning glanced out of the window, opened the window, the window of this room was facing north, as soon as it was opened, the north wind quickly poured in, and Da Zhao came over from behind.

"There's nothing here, did he turn off Xiaoyu and hide here for three hours? Does this make any sense? ”

Zhou Ning didn't speak, stepped forward and stood by the window, leaning out half of his body, at this moment, he saw a plastic bag hanging on the edge of the decorative small guardrail outside the window, Zhou Ning's heart moved, and he propped up the window sill to the window.

Da Zhao didn't dare to speak, and hurriedly went over to help Zhou Ning, this is the third floor, although it is not high, but the whole person is squatting at the window, which is still a little scary.

Zhou Ning didn't get started directly, but poked the plastic bag with a swab, the bag swung for a while, and there was no reaction on the swab, so Zhou Ning used tweezers to pick up the plastic bag and hand it directly to Da Zhao.

Liu Yongxin shouted from behind:

"Don't take it with your hands, handle it gently."

Da Zhao shuddered, grabbed an oval tweezer, caught the bag and put it on the table, and helped Zhou Ning to jump down.

Zhou Ning operated the two tweezers together, opened the bag, and there were four brown glass bottles inside, exactly the same as the sulfuric acid bottle just now, Da Zhao came over and hurriedly took pictures.

"I'll go, there are still four bottles here, is it also sulfuric acid in them?"

Without waiting for Zhou Ning to speak, Liu Yongxin leaned over and shook his head.

"Go back with your things, Dr. Lu is still there, he is a professional, let him distinguish it."

Da Zhao didn't talk nonsense, hurriedly found the box, and packed the things, this thing may most likely be sulfuric acid, poured or broken, it is dangerous, and it must be kept well.

The teacher saw that Zhou Ning was leaving, and pointed to the sulfuric acid liquid on the ground.

"What are we going to do with this, can we clean it up?"

Zhou Ning nodded.

"It's been sampled, there is no need to keep the scene, please clean it up, I think you are more professional."

The man breathed a sigh of relief and hurriedly poured water on the room, after all, it was not much spilled, and this amount could be diluted and cleaned up, and it would not hurt anyone.

......

Half an hour later.

Interpol squad.

Zhou Ning jumped out of the car with his things, Da Zhao held the box, Liu Yongxin followed, and the three of them walked quickly to Dr. Lu's office.

"Dr. Lu, please help me take a look, this is a bottle found outside the window of the suspect's dormitory, he broke a sulfuric acid bottle on the floor of his room, and sprinkled a little on the floor, I'm not sure what these substances are."

Dr. Lu happily leaned over, quickly asked someone to take the bottle, and intimately instructed:

"Don't destroy the bag outside, Zhou Xiaozhou still needs to extract fingerprints, this is also evidence for them, by the way, let's extract the outside of the bottle first, just give me the powder and brush, we can come here."

Zhou Ning naturally didn't talk nonsense, Da Zhao and Liu Yongxin tossed with him until now, but they didn't eat, and he couldn't help it, so he hurriedly left the relevant tools.

"Then it's hard Dr. Lu, let's go get something to eat."

"Let's go, just now Xu Da arranged for someone to send you a boxed lunch, it's all tossed to this point, hurry up and eat."

Liu Yongxin waved his hand.

"You go to eat with peace of mind, I will follow to the city bureau, this time the amount of inspection is very large, and the various tests are very complicated, Xiao Liu explained, I am afraid that there is any omission."

Zhou Ning was a little worried, of course, more apologetic.

"Master, let's go after eating."

Liu Yongxin glanced blankly.

"Less nonsense, listen to mine and listen to yours."

Saying that Liu Yongxin left, Zhou Ning knew that the master was worried about himself, and this matter really made Xiao Liu unclear alone, and it was easy to make mistakes, so the master followed the past, and the speed of detection was naturally fast.

Thinking of this, he immediately dragged Zhao Xinli out of Dr. Lu's office, Da Zhao looked stunned, and looked Zhou Ning up and down several times, as if observing Zhou Ning's state.

"I said, why aren't you in a hurry at all, Cui Guanglin is interrogating, and Xiaoyu is still in the hospital, why are you in a hurry to eat?"

Zhou Ning shook his head.

"Cui Guanglin is not in a hurry, he will not explain in a short time, we also have to wait for the test results to come out, only if the comparison is successful, can we say the next step, as for Xiaoyu, what good exists, but we have to eat well, so that we have the energy to do more things."

Da Zhao sighed, although Zhou Ning said so, he also knew in his heart that Zhou Ning was really anxious, and it was the kind of anxiety that couldn't help, the more calm he was at this time, the more uncomfortable he felt in his heart.

"That's okay, listen to you, let's eat first!"

The two washed up, quickly resolved the battle, and poured a large glass of water, Zhou Ning dialed He Shancun's mobile phone, and when the bell rang, the other party connected.

"I'm still wondering, why are you so calm and don't care about your sister's state?"

"Isn't it up to you, I'm not worried."

He Shancun smiled, he was very satisfied with Zhou Ning's answer.

"Xiaoyu is in a good state, the wound on her head is not deep, she has six stitches, and her hair has not been shaved too much, so as not to affect her appearance, I asked her to do various blood tests, and no problems have been found so far.

The nurse also carefully examined the body, and there was not a single needle hole, but if he was unconscious by inhaling anesthetic, he could not find it in the blood, after all, it was five or six hours ago. ”

Zhou Ning knew that the hospital's laboratory conditions were limited, and now he could only wait for the results of the testing center.

"I know, as long as Xiaoyu is fine, the nurse you are looking for will give Zhou Xiaoyu a physical examination?"

"Ah, what's wrong? Why don't I check it out? ”

"Less, I mean, I didn't find a female doctor to examine her carefully, I was afraid that she had some scars on her body, or...... Let's put it this way, in the previous case, of the several deceased people found, four were HPV positive and one was HIV positive, and I can't tell if it's their own virus or the murderer's problem. ”

He Shancun was stunned, and his face became serious.

"I understand, I'm going to do a body surface examination now, and related tests, why didn't you tell me earlier, did you collect the blood sample of her scumbag boyfriend? Is there a screening for related viruses? ”

"He sent it at noon, I just thought of Xiaoyu, I still want to check it and rest assured, okay, then I'll hang up."

After hanging up the phone, He Shancun pinched the phone and misplaced, feeling a little careless in making friends.

Glancing at the intern beside him, the man was so frightened that he quickly shrunk his neck, eager to bury his face in the monitor.

He Shancun dialed a number, and the other party didn't have a good attitude when he connected.

"Director He received a call from you, I have a pain in my legs and stomach, what's wrong?"

"Hehe, private matter, private matter, a friend's sister was sent to the emergency room in a coma, we are not sure if we have been violated, after all, the suspect has been arrested, this person has a lot of diseases, and it is HIV and HPV, or can you take a look?"

"Five minutes, I'll be there!"