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Chapter 494 Finding Evidence
The mosquito coils kept burning, but the cleaner never appeared in the surveillance.

After Zhao Hang left, Niu Feitian also ate skewers at that table.

After the two left, Ren Hongting and Yang Xiaoli also came over. They ordered twenty skewers of mutton and four bottles of beer, and left after eating.

When Yang Yifan looked back, the cleaner had already collected the dishes, wiped the tables clean, and then turned off the lights, and no one entered the cafeteria again.

After Dong Xianling watched the surveillance, she said to Yang Yifan: "I watched the video last night carefully, and I think the cleaner is the most suspicious."

Yang Yifan also nodded and said, "I also think that cleaner is seriously suspected."

Yang Yifan downloaded the two surveillance videos to his phone, and then left the surveillance room.

It's still early, and there is still an hour before the end of the exam.

Yang Yifan and Dong Xianling came to Ding Jin's room again, and after telling him the results of checking the monitoring, he also looked at the monitoring on his mobile phone and said, "This doesn't seem to explain anything. There are mosquitoes in the cafeteria, and the cleaners are sweeping the floor." It's normal to light mosquito coils every now and then. I think you should start with the skewers. See if someone in the cafeteria poisoned you. Besides, a cleaner and Zhao Hang have no grievances, she didn't poison motivation."

"If someone gives her a lot of money, do you think it's okay?"

"It's possible, that's okay, you go and check. The cleaner is in the cafeteria. You can go to the manager in the cafeteria and ask him to call the cleaner."

When Dong Xianling and Yang Yifan left the office, they pointed to the manager of the cafeteria. After hearing Dong Xianling and Yang Yifan's description, the manager of the cafeteria called the cleaner without further ado.

The cleaner came quickly.

Her back is a bit hunched, her figure is not tall, and the wrinkles on her face look like she is in her 60s.

In fact, she is only 42 years old this year.

The manager of the cafeteria looked at her and said, "Shen Xiaoyun, don't be afraid. I called you here just to get some information from you. Just answer truthfully."

"Hey, okay, but manager, what happened?" Shen Xiaoyun replied tremblingly.

Dong Xianling said gently: "Auntie, don't be afraid, we just want to ask you a few questions."

Shen Xiaoyun nodded and said, "You can ask, as long as I know the question, I will definitely tell you."

Dong Xianling said in a crisp voice: "Aunt Shen, I want to ask you, do you light mosquito coils in the cafeteria every night?"

Shen Xiaoyun nodded and said: "Yes, there are too many mosquitoes in the cafeteria. Our manager asked us to light mosquito coils in [-] places, which can repel mosquitoes and increase the fragrance of the cafeteria."

Dong Xianling felt that there was nothing wrong with what Shen Xiaoyun said, and Yang Yifan also asked the canteen manager about lighting the mosquito coils, and it was indeed authorized by him.

Dong Xianling thought for a while, looked at Yang Yifan and said, "Isn't the problem with the mosquito coils?"

Yang Yifan shook his head and said: "Based on my intuition, there must be something wrong with this mosquito coil."

Shen Xiaoyun immediately argued, and said: "What's wrong with the mosquito coils? I light the Lion brand every night, and no one says there's a problem. If you don't believe me, I can take you to have a look."

Yang Yifan firmly believed that there was something wrong with the mosquito coil, so he and Dong Xianling followed Shen Xiaoyun to the canteen on the second floor.

Shen Xiaoyun wasn't afraid at all, she led Yang Yifan to her grocery room, and showed them the place where she put the mosquito coils, she said as she introduced, every night, after I take out the mosquito coils, I put them there Divide the mosquito-repellent incense on the window sill, and after distributing, I will put them in the mosquito-repellent incense box one by one and ignite them...

After Shen Xiaoyun finished speaking, Dong Xianling said: "There is no problem here."

Yang Yifan walked to a plate with mosquito coils and looked carefully, he found that there were some strange things in the mosquito coils.

The ash of the mosquito coils is gray, but the ash of the mosquito coils there is black, as if it has not been burned.

Yang Yifan touched a little bit of gray mosquito-repellent incense ash with his finger, put it to his nose and smelled it, the smell was a bit sweet, but he also lit a black mosquito-repellent incense ash and smelled it, the smell was even more fragrant, strangely fragrant.

Yang Yifan said: "Aunt Shen, I want to ask you, how come the color of this mosquito coil ash is black?"

Shen Xiaoyun also widened his eyes curiously, and said: "Black? Impossible, did it not burn out?"

Shen Xiaoyun bent down the waist of the bucket, pointed at the black mosquito-repellent incense ash with his finger, and said, "Hey! It's really strange. I've been lighting mosquito-repellent incense for such a long time, but I have never noticed that the mosquito-repellent incense ash is still black. Really It's strange, and the scent is also different, a bit weird."

Yang Yifan looked at the surveillance cameras around him. There was only one 70-degree surveillance camera here, and he didn't know if he could see the location of the window sill. He knew that he couldn't get anything out of Shen Xiaoyun, so he took Dong Xianling to the surveillance room again.

The newly appointed security guard in the monitoring room was very polite to Yang Yifan, and he would help him check whatever Yang Yifan was looking for.

After monitoring number 70 was turned on, Yang Yifan fast-forwarded to the scene at nine o'clock last night.

Soon, a student with a cropped head and wearing the uniform of Qingyun University walked into the surveillance camera.

He secretly took advantage of Shen Xiaoyun to put the mosquito coils, and sprinkled some white things on the mosquito coils.

Then he left quietly.

Dong Xianling asked the security guard to zoom in on the screen. After seeing the student's face clearly, she said, "Isn't this Wang Zhenchang, a top student at Qingyun University?"

"It's Wang Zhenchang. I didn't expect the students of Qingyun University to be so despicable and shameless."

After Dong Xianling and Yang Yifan told Ding Jin the results of their investigation, Ding Jin slapped the table angrily and said, "Humph! This Wang Zhenchang is so audacious that he poisons people! I'm calling the police right now!"

Yang Yifan said: "Principal Ding, don't worry, I think we should go to Wang Zhenchang's dormitory to have a look first, if we can get the heartbreaker, then he won't be allowed to deny it."

Ding Jin nodded, and he immediately asked the logistics people to open the door of Wang Zhenchang's dormitory. After going in and searching, Yang Yifan found an unusual book "The Romance of the Three Kingdoms" in Wang Zhenchang's backpack. He took out the book and After flipping through a few pages, I found a white paper packet in the middle.

Yang Yifan took out the white paper bag and smelt it. The fragrance was incomparable. He showed it to Ding Jin and said, "Principal Ding, this smell is very similar to the smell in the mosquito coil. It should be the same medicine. In the future, people will have diarrhea after smelling it."

Ding Jin left a video on his mobile phone, and then angrily took Yang Yifan and others out of there.

(End of this chapter)