The death scene at dusk has a unique horror beauty, obviously there are no ghosts or anything like that, but when it comes to the topic of death, it always makes people feel chills in their vests.

As a place for collective charcoal suicides, the Sato family quickly fell silent after experiencing the initial uproar, watching the lively crowd disperse, leaving only the blockade surrounding the house.

Led by a Maori police officer, Gao Cheng and Dr. Mitsumi walked through the cordonade into the yard and put on shoe covers before following into the house.

A typical Japanese-style house, similar to the old house where the smart incident occurred in the past, I don't know if it was affected by the case, but it was always a little depressing, and there seemed 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, except for the body being removed, the rest remained the same.

Gao Cheng turned on his flashlight to check the sealed doors and windows, and silently looked at the room furnishings in combination with the photos provided by the police.

There are 4 coal stoves on the low table, and the corpses are lying on the tatami mats around the low table, and it doesn't look unusual.

"It's miserable......"

"That's it, anyway."

The Maori police officer is always a little restrained in front of Gao Cheng, after all, he can become a special adviser to the head of the General Bureau, and his energy must not be careful.

"We suspect that Shoichi Sato froze the girl to death, moved here in a car, and then committed suicide by burning charcoal with two others......"

"But why do you have to freeze to death before bringing it over, since you are ready to burn charcoal to commit suicide, wouldn't it be better to do it here directly?" Gao Cheng questioned.

"This, so it may be that I thought of burning charcoal to commit suicide after killing the girl......"

"There is also a contradiction in timing."

Gao Cheng browses the convocation post posted by Shoichi Sato in the suicide forum.

"The posting time was a few days ago, and it can't be too long for that girl to freeze to death......"

"And this doesn't match the calculations," Sancheng said as he wrote on the data, "I heard that when the police arrived at the scene, the amount of carbon monoxide in the room was 204 ppm, but based on the volume here and the amount of charcoal incinerated, there should be a maximum of 1,800 ppm of carbon monoxide in the house......

Sancheng walked to the tapered window, the scene was very tightly blocked, and only one door could be opened and closed.

"The ventilation holes are blocked, the window cracks are sealed with paper and tape, and the door cracks are also very small, the airtightness of this room is already quite high, and judging by the suicide results, 204ppm is too low."

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

"The period between the death of the three and the time when the police came," Sancheng ignored Maori and looked at Gao Cheng and said, "Someone opened the door to this room, so the carbon monoxide level will be reduced...... It was this person who carried the girl's body into the house. ”

Gao Cheng looked away from the room and turned to Sancheng in a daze.

is obviously a forensic doctor, but the detective is so professional......

"So the prisoner is someone else?" The Maori police officer was stunned.

"That makes the most sense."

"That means that the prisoner knew that the corpse of the charcoal burner suicide would be orange-pink, so he mixed the frozen corpse into the suicide scene?"

The Maori police officer's mind was a little confused, and he hurriedly interrupted Sancheng's words and thought again: "Is this really possible?" ”

"If there is no autopsy, this is a perfect crime," Sancheng looked at Gao Cheng lightly, "Detective Chengto, if it were you, you should be able to profile the prisoner, right?" ”

"Character profile?" Gao Cheng came back to his senses, "I'm not good at this kind of thing...... It should be a person who knows suicide very well, and knows that there will be people in this house who will collectively burn charcoal to commit suicide, and there is a great possibility that they have logged on to that suicide website, live alone, have a withdrawn personality, and the age difference between the murdered girl may not be too big, and it is likely that they met two girls through the Internet......"

Seeing that Sancheng and the Maori police officer's eyes fell on him, Gao Cheng had a headache and said: "There are too few clues, I can only guess these, but starting the investigation from that suicide website, maybe there will be gains." ”

"No," the Mori officer said stunned, "It's already amazing to know so much, if there really is another girl named Xiaohana, it's like an unpredictable prophet, and Detective Joto knew that Sato Shoichi wasn't a murderer from 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 put away the information and smiled at Sancheng: "Excuse me, Doctor Sancheng, I will follow this case, if you find the prisoner quickly, the girl called Xiaohua will be less dangerous." ”

"It's me who should be in trouble," Sancheng handed his business card to Gao Chengdao, "I'll let you know when the results of the examination come out." ”

……

At night, the Castle Detective Agency.

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

"Discussion on the use of coal to kill people and commit suicide, the forced suicide case of a family of four in Urawa City...... Mikoto Mitsumi? Xiao Ai leaned over and looked at the computer screen, "Is that Dr. Sancheng's paper?" ”

"Research Papers."

Gao Cheng rubbed his sour eyes.

"The mother mixed sleeping pills into black tea to put her husband and son to sleep, then lit coals in the room to fill the house with carbon monoxide, and finally the daughter who slept in the next room was rushed to the hospital in time to be rescued, and if it was 30 minutes late, it could have caused brain damage......"

"Dr. Sancheng?"

"Yes, I checked the case, the director and his eldest son of Amamiya General Hospital died collectively in the residence in Urawa City, and the only girl who survived seems to be Mitsumi, who was adopted by the dean's sister's family, and changed her name from Mikoto Amamiya to Mitsumi Mikoto......"

Gao Cheng put a copy of the case information faxed by the Metropolitan Police Department on the table.

"What kind of mother can do this kind of thing, it seems that I didn't find out back then, but it's really remarkable that Dr. Sancheng, who encountered this kind of thing, didn't become a radical criminal......

Xiao Ai didn't look at the information: "Why do you suddenly care so much about that Sancheng doctor?" ”

"Huh?" Gao Cheng was stunned.

"Do ordinary people look up this information when they first meet?"

"Well...... this"

Gao Cheng let go of the document under Xiao Ai's scrutinizing gaze.

"I'm just a little interested in compulsive suicide cases......"

"And then?"

"Then, isn't there another investigation tomorrow? Although the murderer should not be Shoichi Sato, I still want to figure out a little bit about this kind of suicide case......"

"Really?" Xiao Ai temporarily put away her suspicious gaze, "Obviously I just went to participate in the forensic science exchange meeting, why did it turn into an investigation?" ”

"Isn't it just right? You can clearly see the importance of forensic medicine in solving crimes, and if you want to become the world's number one detective and maintain a 100% crime solving rate, you have to keep learning. ”

Gao Cheng thought of Dr. Sancheng during the day, and crossed his fingers thoughtfully: "The forensic doctor is really powerful, with the information they collected, the investigation seems to be much easier, and I feel that the thinking is a lot clearer, I didn't know that the appearance of freezing to death would be the same as carbon monoxide poisoning, and judging the cause of death from cardiac hemorrhage, and speculating that someone had entered the room halfway from the concentration of carbon monoxide in the room, if the gastric juice detects the ingredients, maybe I can also know where the girl's last meal was, and ......"

"Are you still eating?" Xiao Ai asked.

"Eat."