C37

"According to our sampling analysis, the larvae in the victim's body still exist. The results of the test were given by the Center for Analysis and Testing of Central South University. The sulfur content was 0.30%." The medical examiner stood up from his seat and announced the results.

"What does that mean? The insects on the victim's body lived in the cave for some time. "Because not only is the soil in the cave high in sulfur content, but the air is also high in sulfur content due to the influence of geothermal effects." Shen Yuan said.

"Even if your data is correct, the victim and the defendant entered Bird Island at the same time. The victim was killed only after the defendant entered Bird Island. How did that happen before that? The prosecutor smiled contemptuously.

At this moment, the entire court was silent, all of them stared at Shen Yuan with their eyes wide open, waiting to see how he would explain this strange phenomenon.

"If we assume that the body was transferred from the cave to the ship at five in the afternoon, and that we have spent 11.4 hours in the cave, we can speculate that the time of death should be before five-thirty on the morning of the 26th. The victim went in with the defendant at about one o'clock on the afternoon of the 26th, which meant that there was a difference of seven and a half hours between the two. So, where did this problem come from?

This time difference can be explained in part by the cold phenomenon of the corpse.

Normal body temperature, by the body heat and heat dissipation and maintain dynamic stability. After death, because the metabolism had stopped, the body could not continue to produce heat energy, but the heat energy inside the corpse continued to radiate, transmit, flow and evaporate water to the outside world. This caused the temperature of the body to drop and gradually to become colder until it was close to or slightly below the external temperature. This cadaveric phenomenon is called cadaveric cooling or cadaveric cooling. The cooling rate of the corpse is often influenced by various factors and external environmental factors.

Due to the early spring season, the victims wear many clothes, with warmth, and the victims are young and female, with more heat preservation effect of fat, slow heat loss. The lower the ambient temperature of the body, the faster the heat would dissipate, and the faster the body would cool down. In general, the average body temperature of an adult decreases by about 1 ℃ per hour for 10 hours after death in the normal room temperature environment (16-18 ℃), and then slows down after 10 hours. After 24 hours, the body temperature decreases to approximately the same as the ambient temperature. In an environment of 20 ℃ and above, the average body temperature per hour decreased by about 0.5 ℃.

According to these laws, the normal body temperature is usually 37 ℃. So what is the temperature of the body after it has been left in the cave for 10 and a half hours? At least 32 ℃! After 32 ℃ on board, it will take 14 hours to drop to 18 ℃. In other words, the temperature of the body was the same as the ambient temperature for only 10 hours. In fact, the above mentioned temperature refers to the ambient temperature of the corpse, not the body temperature, and the direct impact on the development of the flies' eggs and larvae is determined by the body temperature. Thus, there should be some deviation in estimating the time of death by replacing the temperature of the body with the ambient temperature.

So what should be the correct method of calculation?

At 18 ℃ for 10 hours, from 32 ℃ to 18 ℃ for 14 hours, the mean temperature was 25 ℃, the effective cumulative temperature of the two groups was subtracted by 749.52 hours, the temperature was 219.5 hours, and divided by 34 ℃ (assuming that the temperature of the body in the cave remained the same), the resident time of the body in the cave was 6.45 hours. In this way, we can conclude that the victim was killed at around eleven in the morning on the day the defendant entered Bird Island. In other words, the murderer had hidden the body in the cave after the murder in the morning and had removed it and put it in the boat at around five in the afternoon. The conclusion is that the victim was killed before the victim entered the island.

I can only say that this conclusion was drawn on the basis of my experiments. The reality may be more complex. In any case, the evidence from entomology would have ruled out the defendant killing the victim in the time it took to get to Bird Island. According to the records of the body spots at the time, there were some moving spots on the front and back of the body, indicating that the body had indeed been moved a few hours after death.

In the light of these speculations, I have every reason to believe that Yan-wen is not the real murderer, but rather that he was blamed. "

"Excuse me, why did the murderer move the body into the cabin at five o'clock on the evening of the twenty-sixth instead of the morning of the twenty-seventh?"

"I presume the murderer thought that Yangwen would sail out of Bird Island at five o'clock on the morning of the twenty-sixth. He never thought that he would spend the night on the island."

"Well, Mr. Shen, how do you explain the fingerprints on the wrench?" the prosecutor asked.

"Yang Wen came to the Bird Island to gamble with his three friends. After he lost a thousand yuan, his three friends went back first. For fear of being scolded by his parents when he returned home, he stayed a little longer on Bird Island. He fell asleep and woke up to find it was late. During his sleep, it is not ruled out that someone placed his hand on the wrench to leave a print. "

"According to the records of the interrogation, the defendant went to Bird Island to admire the birds, not as you said." The Prosecutor objects.

"Indeed." Shen Yuan said, "As far as I know, every year at the end of the year, the base police station will receive a task that is assigned by the authorities above. This point might not be good for the Public Security Bureau, but the truth is so. Grassroots police stations, in order to accomplish their income-generating tasks, often run around looking for detectives and actively looking for gambling spots. In the countryside, there is no better way to make money than by looking for a fine. Thus, their best friends had wanted to play cards at home and gamble a little money, but they were afraid of being caught and fined by the police station, so they had thought of going to Bird Island. Why did the defendant only say to watch the birds? I speculated that he thought at the time that since he didn't kill anyone, the police wouldn't have done anything to him. Also, he lost a thousand dollars in gambling and didn't want his family to know about it. More importantly, before going to the Bird Island, the four of them had to give a good confession. No matter what happened, do not tell anyone about the four of them gambling together on the Bird Island. I don't think he wants to offend his friends about this either. "

"Then, since he didn't kill anyone, why did he admit to killing someone?"

"That's not something I can answer."

"Let me answer that." Yang Xue stood up from her seat, "Yang Wen never admitted to killing anyone from the start. There should be records of this little bit of public security personnel being interrogated. But why did Young admit to killing later? That's because I wrote a letter asking him to do it. "

"Brother didn't kill anyone, but elder sister wants him to admit to it. Is that believable?"

"That's right, it really can't be believed." "This is because I was induced and implied by Mr. He Guowei. He said that the public security authorities already have solid evidence, enough to judge the death penalty. If Yang Wen was found to have been killed in a fit of uncontrollable passion by the court, he could be sentenced to a suspended death sentence, with a good attitude, active civil compensation, and no previous record of wrongdoing. He had thought of it from the perspective of Yangwen's temporary survival. Considering that if there is new evidence we can still appeal, our efforts at the trial are not about defending our innocence, but rather about lowering the sentence. "

"Do you have evidence?" the prosecutor asked.

"Yes." I still have the letter my sister gave me. " Yang Wen loudly replied.

"Lawyer He Guowei," the presiding judge asked, "was the defendant's sister right?"

He Guowei stood up, looking a little uneasy. "Yes." Then he sat down again.

"However, I would also like to remind you that there is blood on the deck of the ship from the deceased. If the crime scene was carried out in a cave, how would the blood explain it? "

"Yes, there is blood on the deck. Please note that I said that the victim was killed in the cave on the basis of speculation, and that it is not certain that the murderer killed the victim on board the ship, then moved the corpse to the cave, and waited for the defendant to be blamed. And, Mr. Prosecutor, are you sure that the bloodstains on the deck belong to the victim herself? "

"Well," said the prosecutor, after a moment's hesitation, "where do you think it came from?"