There is a unique sense of horror at the scene of death at dusk. There are no ghosts, but when it comes to the topic of death, it is always chilling.

As a collective charcoal burning suicide site, the Sato family soon quieted down after the initial uproar, and the crowd dispersed, leaving only a cordon around the house.

Under the leadership of Maori police officer, Gao Cheng and Dr. Sancheng go through the blockade belt and enter the yard. After putting on shoe covers, they follow him into the house.

The typical Japanese style house is similar to the old house where the smart incident happened in the past. I don't know if it was affected by the case. Looking at it, it's always depressing. There seems to be a sense of despair in the air.

The scene of the incident was in the living room, a room of about 16 square meters. In addition to the body being removed, the others remained the same.

Gao Cheng checks the sealed doors and windows with a flashlight, and looks at the room furnishings silently with photos provided by the police.

There are four coal stoves on the short table. The corpse just falls on the tatami around the short table. It doesn't look different.

"What a tragedy..."

"That's all."

Maori police officers are always a little stiff in front of Gao Cheng. After all, it's a lot of energy to be a special adviser to the general administration.

"We suspect that after Seiichi Sato froze to death, he moved here with his car, and then burned charcoal with the other two people to commit suicide..."

"But why do you have to freeze to death before you bring it here? If you are ready to burn charcoal and commit suicide, why don't you just do it here?" Gao Cheng questioned.

"Well, maybe it was after killing the girl that I thought of burning charcoal to commit suicide..."

"There are also contradictions in time."

Gao Cheng browsed the call Post released by Seiichi Sato in the suicide forum.

"The posting time was a few days ago. The girl can't have been frozen to death for a long time..."

"And it doesn't match the calculation results," Sancheng wrote on the data. "I heard that when the police arrived at the scene, the indoor carbon monoxide was 204ppm, but according to the volume and the amount of carbon burned here, there should be 1800ppm carbon monoxide at most in the house..."

Sancheng goes to the window pasted with adhesive tape. The scene is sealed tightly, and only one door can be opened and closed.

"The air change hole is blocked, the window seams are sealed with paper and tape, and the door seams are also very small. The air tightness of this room is quite high. Judging from the suicide results, 204ppm is too low."

"It's a bit low," officer Maori wondered, "but what does that mean?"

"From the time when the three died to the time when the police came," Sancheng ignored Maori and said to Gao Cheng, "someone opened the door of this room, so the carbon monoxide content decreased... It was this person who moved the girl's body into the room."

Gao Cheng takes his eyes away from the room and turns to Sancheng.

I'm a forensic doctor. I'm so professional

"So there's another prisoner?" Officer Maori was stunned.

"That makes the most sense."

"That is to say, if the prisoner knows that the body of charcoal burning suicide will be orange pink, he will mix the frozen body into the suicide scene?"

Maori police officer's brain is a little confused. He interrupts Sancheng's words and thinks again: "is this really possible?"

"If there is no dissection, this is a perfect crime," Sancheng light look to Gao Cheng, "city door detective, if it is you, should be able to profile the criminals?"

"Profile?" Gao Cheng said, "I'm not good at this kind of thing... I know a lot about suicide, and I know that there will be people who commit suicide by burning charcoal in this room. It's very likely that they have logged into the suicide website. They live alone, have a lonely personality, and the age difference between them may not be too big. It's probably that they meet two girls through the Internet..."

Seeing that police officers Sancheng and Maori have their eyes on themselves, Gao Cheng has a headache and says: "there are too few clues. I can only guess these. However, starting from the suicide website, we may get something."

"No," officer Maori said stupidly, "it's very powerful to know so much. If there is another girl named Xiaohua, it's just like foretelling. Detective Chenghu knew that Sato was not the murderer at the beginning, right?"

"It's just basic logical reasoning. Doesn't the detective just want to know what's inside before opening the box?"

Gao Cheng puts away the information and smiles at Sancheng: "please, doctor Sancheng, I will follow this case. If you find the prisoner quickly, the girl named Xiaohua will be less dangerous."

"The trouble is me," Sancheng said, handing his business card to Gao Cheng. "I'll let you know when the results come out."

……

At night, the city door detective office.

When Xiao AI sat down for dinner, Gao Cheng was still checking the information on the second floor and was fascinated.

"On the use of coal to kill and commit suicide, a case of forced suicide of a family of four in Puhe city... Sancheng Meiqin?" Xiao AI leaned to the side and looked at the computer screen, "is that doctor Sancheng's paper?"

"Research papers." Gao Cheng rubbed his sour eyes“ The mother mixed sleeping pills with black tea to make her husband and son fall asleep. Then she lit coal in the room and filled the room with carbon monoxide. Finally, only her daughter who was sleeping in the next room was sent to the hospital in time to be rescued. If she was 30 minutes late, it might cause brain damage... "" Dr. Sancheng? "“ Yes, I checked this case. The president's wife and the eldest son of Yugong general hospital died in Puhe city. The only girl who survived seems to be Sancheng. After being adopted by the sister's family, she changed her name from Yugong Meiqin to Sancheng Meiqin... "Gao Cheng put a case information faxed by the police department on the table“ What kind of mother was able to do this kind of thing? It didn't seem to be clear at that time. However, Dr. Sancheng, who encountered this kind of thing, didn't become an extreme criminal. It's really amazing... "Xiao AI didn't go to see the information:" why do you care so much about Dr. Sancheng all of a sudden? "“ Why Gao Cheng was stunned“ Do most people look up the information when they meet for the first time? "“ Well... "Gao Cheng let go of the document in Xiao AI's eyes“ I'm just a little bit interested in cases of compulsive suicide... "And then?"“ And then, isn't there another investigation tomorrow? Although the murderer should not be masichi Sato, but I still want to understand this kind of suicide case more or less... "" is that right? " Xiao AI temporarily put aside his suspicious eyes, "I just went to the forensic science exchange meeting, why did it become an investigation?"“ Isn't it just right? We can clearly see the importance of forensic medicine in solving cases. If you want to be the first detective in the world and keep the detection rate 100%, you have to keep learning. " Thinking of doctor Sancheng during the day, Gao Cheng crossed his fingers: "forensic medicine is really powerful. With the information they collected, it seems that the investigation is much easier and the thinking is much clearer. Before, I didn't know that the appearance of freezing death would be the same as carbon monoxide poisoning, and that the cause of death could be judged from cardiac hemorrhage, From the concentration of carbon monoxide in the room, we can infer that someone has entered the room halfway. If the composition of gastric juice is detected, maybe we can know where the girl's last meal is, and... "Do you still eat?" Xiao AI asked“ Eat. "