"Aria on G strings".

The most rational symphony in the world.

Shi Zuo is the martyr of rationality. He firmly believes that the essence of distinguishing humans from animals lies in reason.

When he is in a restless mood, this song can help him calm down.

During lunch break, the campus radio will play this song.

This is a rare reason why he likes Hinaki.

He pried open the door lock on the top floor and sat on the rooftop of the school, beside him was an unopened lunch box.

This is his second secret base.

For him, the student card distributed by the school is a master key to entering and leaving the place where every student is forbidden. This trick was originally written by Mr. Demon, but for a long time, he has benefited from it.

No one would disturb his peaceful lunch break anymore—especially the annoying Liu Yanshi.

He can wander in the river of rationality, alone until two o'clock in the afternoon.

Listening to the calm melody, Zuo gradually felt a little tired.

After a while, he heard footsteps.

Opening my eyes, I sighed silently in my heart.

The smiling eyes of Liu Yan.

And Fu Yinger.

...

...

...

"The first time I realized the strangeness of this case was the forensic identification documents you sent me."

Zhu Ansheng took a sip of cigarette and collapsed on the sofa.

Xia Liang frowned and asked:

"Forensic identification documents?"

He remembered that Zhu Ansheng had indeed printed out the document and studied it, and he also took a lot of notes on it.

"Fu Sizhe's body identification characteristics are that the body surface has cherry-red spots and kidney failure. It is initially determined that the death time is more than twelve hours."

Zhu Ansheng smiled:

"All this is in line with the characteristics of frostbite. The forensic doctor cannot determine whether the death wound was a heavy blow from the head, and it is not ruled out that he had stopped breathing before being hit - because he may have been frozen to death."

"Is there anything wrong with this?"

"Have you ever understood forensic medicine?" Zhu Ansheng turned his head and looked at Xia Liang, and Xia Liang shook his head:

“That’s a completely different field from my major.”

"Sometimes, if you want to investigate a case, you have to be like a panacea, knowing all kinds of messy things." Zhu Ansheng spitted out a cigarette and said lightly:

"There is a relatively interesting topic in forensic identification. When judging the cause of death of a deceased, there are two ways to die more easily..."

He narrowed his eyes slightly:

"Frozen to death, and carbon monoxide poisoning."

Xia Liang was stunned.

Zhu Ansheng continued:

"The corpse characteristics presented by these two methods of death are very similar. As I said just now, cherry red spots and kidney failure are both characteristics that people who die of frozen death and those who are poisoned by carbon monoxide."

"You want to say that Fu Sizhe was actually poisoned by carbon monoxide? How is that possible?"

Xia Liang widened his eyes:

"Normal, the blood concentration of carbon monoxide in the body of the dead who suck gas or burn charcoal will be extremely high. There is no reason why the forensic doctor cannot detect it?"

Zhu Ansheng raised his legs and said:

"Unless the deceased has been dead for a long time, the concentration of carbon monoxide in the blood has dropped to normal levels."

Xia Liang shook his head and said in wonder:

"This is too ridiculous... Fu Sizhe clearly found it in the cold storage. No matter what, it is more reliable to freeze to death, right?"

Zhu Ansheng glanced at him deeply and exhaled.

"This is the real cleverness of the 'murderer's crime location in the cold storage. It is not just to pretend to be the deceased and arrange a double secret room. The most important thing is to prevent the forensic doctor from determining Fu Sizhe's real cause of death and create a 'blind spot'."

Xia Liang asked in confusion:

"What is the blind spot...?"

Zhu Ansheng did not answer, but asked replies:

"Xia Liang, why do you think I have always emphasized that the murderer is an absolute genius?"

Xia Liang didn't say anything and shook his head.

Zhu Ansheng said with a smile:

"Ordinary people want to make something complicated, it may take a lot of time and effort to create details, making the whole incident confusing. But real geniuses don't need to do this - they will only start from an angle that ordinary people can't imagine, and use simple means to complicate the whole incident in one breath."

Xia Liang frowned slightly and before he could ask again, Zhu Ansheng said:

"The most clever thing about this case is that the murderer used the trick of time to turn 'suicide' into 'homicide'."

Xia Liang sat up straight and suddenly widened his eyes:

"Did Fu Sizhe commit suicide?"

Zhu Ansheng nodded.

"On Saturday morning, I borrowed your police certificate and went to Fang Qing's house."

"What did you find?"

"There are many doubts."

Zhu Ansheng thought for a while and continued to speak.

"When I realized that Fu Sizhe might have committed suicide, I began to doubt his real death time. Because the death time of the body was affected by temperature, it is impossible to determine, so the possibility that he had died on Saturday morning cannot be ruled out."

"But, this will lead to another problem: if Fu Sizhe died on Saturday morning and brought him into the cold storage at 10:30 pm, there will be twelve hours left. This period is enough to make the body stiff and change, and the forensic doctor has not identified this."

"This means... the deceased is likely to have been in a low temperature environment before being locked in a cold storage."

Xia Liang muttered:

"That's right, there are only a few cold storages near Huangsha. You can't keep him in the refrigerator, right?"

Zhu Ansheng glanced at him:

"No refrigerator is needed. Just a large number of ice packs are enough... I have investigated the seafood market. On Saturday afternoon, someone borrowed a cart from the boss and bought twenty bags of ice. According to the description of the appearance, it all matches the age and characteristics of Shi Zuocai."

"After I entered Fang Qing's house, I went to the toilet on an excuse and found that there was a bathtub in her house. There was no dust on it, and it must have been used recently. But when I asked about this, Fang Qing's answer was that no one had used a bathtub during this period."

Xia Liang opened his eyes wide.

"In other words, after Fu Sizhe died, the body was placed in a bathtub filled with ice bags, delaying the time when the body rotted and stiffened..." Zhu Ansheng nodded and continued:

"In addition, I noticed one thing... Fang Qing said that their family has not cooked fire in recent days."

Xia Liang nodded quickly.

"I have noticed this too. Zhao Gang said that he had visited several times and found that Fang Qing was ordering takeout and eating very lightly. We just thought it was because she was not in the mood to cook."

Zhu Ansheng smiled undeniably:

"It's understandable to think so. But if you use a more conspiracy theory idea - the reason why she doesn't make a fire is because she has a psychological shadow on Sizhe's suicide by burning charcoal, it may make sense."

Xia Liang quickly frowned and noticed the details in Zhu Ansheng's words:

"How do you make sure Fu Sizhe committed suicide by burning charcoal? Is it impossible for gas poisoning?"

Zhu Ansheng shook his head.

"Because Fu Sizhe committed suicide in the study."

Xia Liang was shocked and asked quickly:

"How is that possible? My colleague also investigated the room and found nothing special... because Fang Qing had already done a major cleaning..."

"The mentality you have when you investigate is different from mine, so you will naturally miss some details subjectively." Zhu Ansheng explained:

"When I first went to investigate Fang Qing's family, most of you probably didn't believe that Fang Qing would kill her husband - in fact, it was true. So you just thought it was business and didn't care about those inconspicuous places."

"And I... walked into Fang Qing's house with Fu Sizhe's idea that it was very likely that he committed suicide."

Xia Liang was silent for a moment and asked again:

"So, what did you find?"
To be continued...