In the blink of an eye, it was the middle of July. Tanigawa City, which has been exposed to the sun for many days, finally ushered in another pleasant heavy rain.

Sun Meng stood in Room 1302, Building 29, Walnut Ridge Community, gently twisting his chin, and then he fell into deep thought.

Outside the window, the sky was pitch black, the wind was mixed with lightning, and the rain poured down. With this heavy rain, the heat has dissipated a lot.

Despite the sudden rain, the time in the rain was still quiet. This rare tranquility also gives people the space to calm down and see, to think.

Sun Meng had been standing motionless in the room for ten minutes.

The suspect chose to call at a specific time again, not only because the purpose of the ridicule was clear, but also because the suspect must have something he wanted to express at that particular point in time. This may also mean that he has already looked for the next target at this moment.

And Sun Meng has begun to suspect that there is some kind of connection between someone within their police and the suspect. Because of what the police have done in the past month, he even knows everything about it.

Just before they revisited the scene again this afternoon, the Tanigawa City Public Security Bureau also received the anonymous call again, but this time the suspect directly asked Sun Meng to answer by name.

When Sun Meng took the phone, there was only one sentence left that made his scalp tingle.

"He Shipeng was killed by me. You don't have to investigate Yan Yuhua anymore. Because I am the person who hates him the most in the world. ”

Coming to He Shipeng's house again today, Sun Meng's purpose is to restore how He Shipeng died at that time. And to speculate on the circumstances under which the suspect could have completed the murder and still be able to leave no trace.

Zhou Kai had been lying down at the place where He Shipeng died for almost five minutes.

Li Yingbo stood by and watched as he muttered words. He gently patted Zhou Kai's shoulder, Zhou Kai slowly opened his closed eyes, and beads of sweat were already oozing slightly on his forehead at the moment.

In fact, the intersection between Zhou Kai and He Shipeng in school is not deep. On the contrary, later, when He Shipeng and his ex-wife Zixin handled the division of divorce property in the court, Zhou Kai happened to finish the case there. The two of them passed by at the door, and Zhou Kai recognized him. Since then, the two single men have often gotten together for drinks. To be precise, it was He Shipeng who replaced wine with tea.

Gu Xiang was lying next to the secret door under the cupboard in the kitchen, his face facing Li Suqing outside the secret door.

In front of the fire escape is a monitoring blind spot. At this time, Li Suqing had already prepared a bottle of acetylsalicylic acid in an aqueous solution, in which a large amount of odorless erythromycin was mixed into it.

Before that, the two of them had tried many things. This includes trying to enter the house with the deceased and then taking advantage of the deceased's lack of a spare cup to complete the dropping, as well as lurking in the attic and taking advantage of the height difference between the windows connecting the attic and the interior to complete the dripping. But no matter what method of poisoning, there is no explanation for how the suspect escaped with his whole body.

Although Sun Meng's eyes were looking at Gu Xiang's side, his mind was still thinking.

"Let's go, I'm ready." Gu Xiang signaled to Li Suqing outside the secret door.

This time they took the "jet method".

As soon as Gu Xiang's head appeared from the secret door, the water solution in Li Suqing's hand sprayed out like a splash. Gu Xiang pretended to be the victim panicked and opened his mouth, and a large amount of liquid flew directly into his mouth.

Sun Meng looked at Gu Xiang, who was wet on his head, and his eyes suddenly lit up. He let out a low growl, and the rest of the scene quickly gathered around him.

"If the victim only died at home, but he was not poisoned at home, this is naturally a secret room."

"Moe team!" Li Suqing instantly understood, and his face became excited.

"Team Moe, you mean the murderer didn't actually enter this room at all, did you?"

Sun Meng nodded. Gu Xiang immediately raised a questioning voice.

"I don't agree with Team Moe. The victim was caused by the simultaneous fusion of acetylsalicylic acid and odorless erythromycin with the alcohol in the victim's body to produce toxins, which accumulated in large quantities on his severely hardened liver for a short period of time. But aspirin itself is not a highly toxic substance, so how can the murderer control the time and dose just right to make the victim die at home? In other words, how did the murderer get a victim with a rich medical background to willingly drink this glass of water? ”

An inscrutable smile appeared on Sun Meng's face. Li Suqing, who was excited just now, frowned at the moment.

"I think it should be the wine that the victim willingly drinks. As for the cup of water that could kill him, he would have drunk it at that scheduled time anyway. Sun Meng twisted her chin slightly, and the thoughts in her heart were gradually clear.

"I'm really confused, Team Moe!" Now it's not just Gu Xiang, even Li Suqing and Zhou Kai are all puzzled.

Only Li Yingbo looked at Sun Meng quietly, and when the eyes of the two people met, they both nodded understandingly.

"Zhou Kai, how is your health as Teacher He?"

"Huh?" Zhou Kai was asked by Sun Meng, but he didn't know how to answer.

"So Zhou Kai, did he fail a class when you were in college?"

"There is no moe team. Professor Ho mainly teaches in the School of Clinical Medicine and the School of Traditional Chinese Medicine, and our forensic medicine major only has two courses: Clinical Forensic Science and Anatomy. Think about it, I can come to such an excellent family as the forensic department of our municipal bureau, can I fail the department when I go to school? ”

Zhou Kai's serious appearance really made Sun Meng laugh. The tense and serious atmosphere just now happened to have a nice relaxation.

"Alright, I'm not going to sell anything to you. In fact, we have all fallen into a misunderstanding. Sun Meng's expression was full of confidence.

"We found the deceased here, and at the same time the deceased died of aspirin poisoning. Referring to our previous experience in handling cases, it is natural to set this place as the first scene. But there was no trace of the murderer at the scene, and we were at an impasse. ”

Sun Meng turned around and walked to the door, beckoning everyone to pack up their things and leave with him: "That's it in the house." Follow me to the entrance of the community. ”

Before I knew it, it was evening, and the heavy rain that had been falling all day had already stopped. In the afterglow of the setting sun, a rainbow appears in the sky of Tanigawa City.

The Walnut Ridge community is lively. One after another, cars coming home from work drove into the community. The old people who sat in the damp pavilion and breathed in the fresh air after the rain greeted the people who passed by in front of them from time to time.

As time went on, the people in the community had forgotten about the case that happened here a month ago.

Some people who had just returned home to prepare dinner came out with a couple of buckets. Their destination was the cabinet water dispenser located at the entrance of the community.

Tanigawa City was earlier known as a city for heavy industry. The rapid development of heavy industry has led to the serious destruction of Tanigawa's groundwater resources. Therefore, almost every community in Tanigawa City has several cabinet water dispensers placed there. An upscale community like Walnut Ridge will also have two more direct drinking water dispensers next to it.

Such a mundane thing has never been the focus of the police. But now when they think that the water dispenser may become a breakthrough in He Shipeng's case, everyone's hearts are full of excitement.

There are a total of three cabinet water dispensers in the second phase of the Walnut Ridge Community, and they are all arranged on the left hand side of the south gate of the community. Next to the three cabinet water dispensers are two direct drinking water dispensers, one of which can store solar energy and has a heating function. These five water purification devices are lined up on both sides of the community wall with the security office at the south gate. In other words, you can't see it from the security room.

Sun Meng stood in front of the water dispenser squinting and twisting her chin. From time to time, he leaned over to the water dispenser's inlet to take a closer look.

These water dispensers plus the base are two meters five high. The location of the water outlet is almost on the chest of an adult man.

The direct drinking water dispenser next to it is all made of stainless steel, with three layers up and down. The top layer is a direct drinking water pipe, the second level can be washed with reflux water, and the bottom layer is a removable filter and plumbing unit. The visual height is about 70 centimeters.

Sun Meng put his hand into the bottom layer of the direct drinking water dispenser and twisted it gently, and the filter element was exposed.

He raised his wrist and looked at his watch: "It only takes about 5 minutes to walk here from He Shipeng's house." ”

"In fact, He Shipeng's lethal factor is not the only one!"

Sun Meng said to the people who sat back in their cars. When they came in the afternoon, they parked their cars in the ground parking lot at the south gate of the community. Now sitting here, I can see the water dispenser directly opposite.

"The last time Lao Li had an autopsy, it was found that He Shipeng had very severe liver cirrhosis before his death. In fact, what I interrupted him at the time and didn't ask him to go on was that his cirrhosis had progressed to the point of early liver cancer. ”

Li Yingbo nodded, and Zhou Kai sniffed unconsciously.

"Zhou Kai just mentioned a very important information, that is, He Shipeng also taught in the College of Traditional Chinese Medicine. Then according to common sense, he should also have a certain knowledge of Chinese medicine. Therefore, you forensic doctors should know how TCM treats liver cancer. ”

Zhou Kai was a little confused for a while. Li Yingbo pushed his glasses and gently spit out two words: "Arsenic." ”

"Yes, there is a method in Chinese medicine that uses arsenic trioxide powder as medicine. But He Shipeng, as a doctor, must understand the consequences of using such a thing. So the only possibility that he is still firmly using this medicine is that he has other medical conditions. ”

"Syphilis?" Lee Ying-bak blurted out.

"Yes, Lao Li. So tomorrow I want you to do another autopsy. Focus on examining He Shipeng's lymph nodes and raw organs to see if my guess is accurate. ”

"Team Moe, I still don't understand what you are talking about has to do with the water dispenser." Gu Xiang shook his head.

"I'll tell you about it slowly when I get back to the game. Now can you determine the simulated portrait of the suspect? Sun Meng still had a smile on his face.

"He has a wealth of medical knowledge, is familiar with the surrounding environment of the community, knows the victim's physical condition well, and knows his work and rest rules very well." Gu Xiang snapped his fingers and said.

"Plus one, knowing that the victim must have drunk that day."

"Moe team! I seem to know! Zhou Kai's eyes lit up.