The last test was not detailed, and Ji Gang was greedy for his work, which resulted in hundreds of innocent deaths, which taught Yang Qiuchi a great lesson, so this time he had to find out the real cause of death.

How to test him has already figured out. He wants to find out the real cause of death without dissection, not only requires technology, but also some luck. I hope that the cause of Xianfei's death itself can be found without dissection. Otherwise, it will be difficult to deal with.

Yang Qiuchi got on the ladder on the side of the coffin and took off the satin covered on it, revealing the body of the concubine Xian. Because it was cold and cold, it was deep underground. Although it had been almost a month, the body was still similar to last time, with only mild corruption.

He first took out the extremely exquisite and priceless burial items beside the body of the Concubine Xian, revealing the embroidered brocade quilt underneath, grabbed the cushion on both sides, and lifted the corpse up hard. He slowly stepped down from the wooden ladder and placed the corpse on the bluestone floor.

He unfolded the sheet and exposed the body of Concubine Xian. This time, Yang Qiuchi was no longer polite. He stripped away all the dresses of Concubine Xian and began to conduct a physical examination bit by bit.

The corpse spots are located at the low point of the back. According to Lian'er and others, although Concubine Xian was lying on her side when she died, the corpse spots were found before they appeared or were found at the beginning. After that, they were in the supine position.

When Yang Qiuchi carefully checked the corpse spots, he was surprised. The corpse spots were bright red instead of the common dark red. There are two possibilities. One possibility is that the corpse was placed in the ice warehouse and the ground oxygen in the air formed oxygenated hemoglobin through the skin, so the corpse spots were bright red. The other possibility is that carbooxyhemoglobin was formed in the body of Xianfei, so the corpse spots were bright red. If this is the case, it means that Xianfei died of carbon monoxide poisoning!

This reminded Yang Qiuchi of the imperial physician when he talked about the death of Concubine Xian, and there was a saying: "Watch the lips are red and red." This is one of the symptoms of carbon monoxide poisoning. However, it was midsummer in July, and it was generally impossible to have charcoal fire, so he did not think about the poisoning of charcoal fire. Now combined with the corpse spots, the possibility of this suspicion is getting bigger and bigger.

However, there is no further evidence that we cannot draw conclusions. Before this, he decided to verify whether the Virgin died of arsenic poisoning.

Yang Qiuchi opened the forensic evidence investigation box, took a syringe, sucked some normal saline, and stabbed it into the stomach of Xianfei's corpse. He injected the normal saline in.

After waiting for a while, I replaced the syringe with a large needle and slowly sucked back the normal saline that had just been injected into the stomach. I removed the needle and injected the gastric solution into the duck's throat.

After waiting for a long time, the duck was still jogging and clamoring, nothing happened. This proves that there was no poison in the fairy's stomach! Of course, it proves that he was poisoned after death.

Now that arsenic poisoning is ruled out, it is even more likely that the suspected Virgin died of carbon monoxide poisoning just now.

When testing for carbon monoxide poisoning, the first choice for the blood in the heart and the large blood vessels is. If carbon monoxide is detected in the heart blood, it can be confirmed.

The blood of those who are poisoned by carbon monoxide is cherry-red, fluid, and not prone to corruption, which will slow down the entire corruption process of the corpse. This is also one of the reasons why the corpse is only slightly corrupted after the death of Concubine Xian.

Since charcoal oxygen hemoglobin remains in the body for a long time, even if the body is already decayed, it can still be detected. Therefore, Yang Qiuchi is not worried that it will not be found.

He took a syringe, inserted it into the heart of the deceased, extracted the blood of the deceased, and then used the sodium hydroxide method for testing. A few minutes after adding reagents to the blood of the test material, the blood turned grassy yellow. This shows that the blood of the deceased contained high concentrations of carbon monoxide. Xianfei died of carbon monoxide poisoning!

Yang Qiuchi was not at ease and took blood from the deceased's large blood vessels and used another method - sodium sulfide method for testing. The blood was still rose-red, and the normal blood should turn green and brown. This proves again that Concubine Xian died of carbon monoxide poisoning!

Where does carbon monoxide come from in midsummer of July? I can’t figure it out, and it seems that it is necessary to go to the inn and conduct a re-investing on-site inspection.

Yang Qiuchi continued to conduct a corpse examination and found no other abnormalities. Then he put on a dress on the corpse, packed up the inspection equipment, and called Song Yun'er in.

Song Yuner said curiously: "How is it? Have you found anything?"

Yang Qiuchi thought for a while and then said, "Concubine Xian was not poisoned by arsenic, but was poisoned by charcoal. As for whether it was an accident or someone deliberately murdered this method, further investigation is needed."

Carbon monoxide poisoning has been known in ancient times. "Xiyi Jilu" records: "If the coal poisoning is caused by the soil pit, the fire and smelly air will be fumigated and the person will die without realizing it. The corpse is soft and unharmed, similar to those who cannot be awakened by night sleeping in a nightmare." At that time, it was realized that the earth gas produced by coal combustion can cause death. However, I still don't know that this gas is called carbon monoxide.

Song Yuner was very surprised and asked, "No, it was July when Concubine Xian died, and it was the hot summer. Where did the coal come from?"

"So we have to go back to the crime scene of the station to check."

Yang Qiuchi asked her to help put the body and burial objects back into the coffin, and then asked County Magistrate Wang to take Minzhuang to cover the coffin lid and backfilled the tomb passage.

Afterwards, Yang Qiuchi took Song Yuner, Hong Ling and the guards to Lincheng. He arrived in Lincheng two days later.

Because the Emperor and the Empress lived in Lincheng Station, and the Empress died of illness in this station, the magistrate of Lincheng thought it was very memorable, so he reported to the upper house to apply for a special fund to build another station. The original station was all sealed and preserved as a souvenir, and the items inside were kept as they were not allowed to live there. Of course no one dared to object to this idea. Therefore, the site of the station was kept intact and had the value of re-exploring the site.

Accompanied by the magistrate of Lincheng and the post station officials, the crime scene was re-invested.

Lincheng is a small town, and the furnishings of this inn are also very simple. Yang Qiuchi took Song Yun'er to look around in the room where Concubine Xian died. After carefully checking the items one by one, no abnormalities were found.

Yang Qiuchi pondered for a moment. Since the concubine Xian died of carbon monoxide poisoning, there were no car exhausts or gas stoves in ancient times, so the main ones that could produce carbon monoxide poisoning were coal and charcoal.

Coal was far from large-scale mining in the Ming Dynasty. It was already mined and used, and was mainly used for smelting and production. There was almost no coal used in life. After inquiring, it was found that the station did not use coal, so the only thing that is most likely to cause carbon monoxide poisoning is carbon fire.

During the time when the emperor took the Empress to the inn, the inn was heavily guarded and outsiders could not get close. If they wanted to come in, they would have to conduct a security check like the palace. If someone came with a charcoal fire, they would definitely be questioned and suspicious. Therefore, it was almost impossible for the charcoal fire to be brought in from outside. Then there was only one possibility - the charcoal fire that caused the carbon monoxide poisoning of the Xianfei Queen was in the inn!

Yang Qiuchi asked the postman’s official: “Does your postman use charcoal to keep warm in winter?”

"This is the land." The postman bowed and replied.

"Where are your charcoal?"

The postman pointed to the two small rooms in the corner of the postman's yard: "It's right there."

Yang Qiuchi walked to the small room, the door was not locked, and gently pushed it open. This room was a suite, with several rows of charcoal-burning braziers outside, and some stoves for boiling water.

There was a small pile of charcoal pile in the inner room. The postman explained: "These were not used up last winter. After the emperor left, the postman was sealed according to the instructions of the magistrate, and it remained the same."

Yang Qiuchi walked to the braziers and stoves outside, squatted down, and observed them carefully one by one. After thinking about it, he stood up and quickly walked to the room where the emperor lived, let others wait outside, open the door and windows, and then entered the house by himself, lying under the last window in the house, his face almost touched the ground, first observe slantedly, and then checked the past bit by bit.

The windows and doors were opened, and the room was very bright. Yang Qiuchi's eyes were nervously searching the ground inch by inch. Suddenly, his eyes lit up and told Nangong Xiong to carry his forensic physical evidence investigation box in. It opened, took out the tweezers, carefully picked up seven or eight small particles on the ground with tweezers, put them in a glass tube, and then put them back into the forensic physical evidence investigation box.

Song Yun'er kept looking at the door nervously. She never could speak during Yang Qiuchi's investigation of the scene. She knew that what Yang Qiuchi needed most at this time was quiet thinking.

Yang Qiuchi stood up and lie on the ground one by one the palace maids and eunuchs lived in at that time to carefully inspect the ground. Finally, when he checked one of them, his eyes lit up again. He brought the forensic evidence investigation box, took out the tweezers, lay on the ground, clamped up a few small particles, and put them into another glass tube.

Then, Yang Qiuchi wandered around the room for a while, his eyes fell on an iron kettle boiling water on the table next to the door. He walked over, picked it up, looked at it, and nodded as if he had some understanding.

After leaving the room, he went back to the small suite where the charcoal was just putting on, and used tweezers to pick up some charcoal residue and charcoal powder from the ground, and put it into a new glass tube.

Yang Qiuchi returned to the room just now, told Song Yuner and the others to wait outside, then closed the doors and windows, took out the microscope, and observed the three small particles extracted. When his eyes left the microscope, he was already full of excitement and a hint of pride.

After Yang Qiuchi finished the inspection, Song Yuner saw that he was full of excitement and couldn't help asking: "Brother, how are you doing? Have you noticed it?"
Chapter completed!