Concubine

Chapter 308 Diatoms
"Then did this person drown in the water before he was alive, or was he thrown into the water after death?"

"The preliminary judgment is that he drowned in the water before he was alive." Yang Qiuchi picked up the hand of the corpse and motioned for Song Yuner to look at the fingernails of the deceased.Song Yuner stared at it for a long time, but found nothing unusual, and looked at Yang Qiuchi suspiciously.

Yang Qiuchi said: "Look carefully under his nails, what's there?"

Song Yuner stared at the gap between the nails, frowned and said, "Hey~! This man's nails are so long that he doesn't even cut them. Look at the black mud in the nails~!"

"Look carefully, it's not black mud."

"No? What is that?"

"River mud, the sediment in the bottom of the river!"

Song Yun'er's eyes lit up: "I see, if this person entered the water alive, he would sink to the bottom of the water because of the stones tied to him, and the mud and sand would sink deep into his nails, it wouldn't have been deposited into his nails with the flow of water. It was when we were struggling, we grabbed and dug the sediment from the bottom of the river, and it was left behind."

"Very good!" Yang Qiuchi praised, "Yun'er has learned to observe carefully. This kind of careful observation is needed to solve the case. Only in this way can clues to the crime be found."

Song Yuner smiled smugly, showing her neat little teeth.Yang Qiuchi found that Song Yuner's small teeth were as neat and beautiful as her cousin Song Qing's.

Yang Qiuchi continued: "According to the crab-like foam at the nose and mouth of the deceased and the sand in the fingernails, the preliminary judgment is that he entered the water during his lifetime. Of course, a definite judgment must be made, and further testing is required."

"How to test further?" Song Yuner wondered.

"This... is too complicated, I'll tell you later." Yang Qiuchi played a trick, and then continued to examine the corpse.

It's not that he's being tricky, but that he really can't tell Song Yun'er, because further testing is an autopsy. After the autopsy, if foreign objects such as inhaled river water or even aquatic plants are found in the upper respiratory tract of the deceased, or mucosal epithelial ulcers caused by severe coughing appear in the respiratory tract Swelling, water emphysema, or river water or even aquatic plants and sediment foreign objects in the stomach can be further judged as drowning.

Because only the breathing behavior of the living can cause this result, the dead do not breathe, so the water can only reach the mouth, at most the upper part of the upper respiratory tract, and it is impossible to reach the lungs or gastrointestinal tract.

In addition, there is another very important task of autopsy, which is to detect diatoms in the body of the deceased. If plankton diatoms are found in the internal organs of the deceased, it is basically certain that he died during his lifetime.

Of course, autopsies could not be carried out in ancient times.Yang Qiuchi wasn't prepared to take the risk, so he couldn't tell Song Yuner.

However, although an autopsy cannot be performed, the necessary tests will still be done.One of the most important tests that Yang Qiuchi had to do in the drowning autopsy was the detection of diatoms.This is an important reference for finding the place where the deceased fell into the water.

Diatoms are a kind of plankton invisible to the human eye in waters, most of which are single cells, can be sucked into the lungs of the deceased along with the water flow, and spread throughout the internal organs of the body through internal circulation.If a person is thrown into the water after death, since the dead cannot breathe, the diatoms in the water cannot enter the human body.Therefore, the discovery of diatoms from the internal organs of the human body can be used as an important evidence to prove that people drowned in water during their lifetime.

Of course, this is not absolute. There are also cases where diatoms are detected from the body without drowning, because diatoms not only exist in water, but also in wet places on land, in the air, and in food.

Another important function of diatom testing is to find the place where the dead fell into the water.

There are more than 5000 types of diatoms. In a river, the types and units of diatoms in different waters cannot be exactly the same.What Yang Qiuchi has to do is to find out the diatoms in the body of the deceased and determine its type and unit quantity, and then take water samples from the sinking site and different water sections upstream for testing. If the two are consistent, that is the sinking site.

The content of diatoms in various organs and tissues of the human body is different, mainly concentrated in the lungs and liver, and other heart blood, kidneys, heart, and spleen.However, different internal organs have different detection rates due to their different contents.For example, it can be detected 14.00% in the lungs, but only [-]% in the spleen.

Therefore, the ideal is to dissect and extract the lungs and liver for testing, but this was impossible in ancient times. However, this is not a problem for Yang Qiuchi, because diatoms can also be found in the teeth of the drowned.

Therefore, Yang Qiuchi extracted a tooth of the deceased for examination.

Seeing that Yang Qiuchi refused to speak, Song Yuner curled her lips, and then watched Yang Qiuchi examine the body.

Yang Qiuchi checked the dead man's cornea and found that it was severely clouded, and the skin of his hands and feet had peeled off. Judging from the corpse spots and body corruption, the time of death was about two days.

When the rigor was checked, it was found that the rigor had begun to ease.It was judged that the time of death of the deceased was about two days ago, while the rigor of corpses on land generally began to ease after three days.However, it is different for drowned people. Due to violent struggle, convulsions, and violent muscle movements, rigor rigor occurs early, and correspondingly, the relief is relatively early.

Examining the body surface of the corpse, it was found that there were some scratch marks, which were very shallow and not enough to cause death. It should have been caused by the collision of the corpse with rocks when it was floating in the water. In addition, there were some pale small wounds on the corpse. Small fish and the like are left behind after biting.

There was a thin iron chain around the neck of the deceased, and a large stone was tied at one end of the iron chain.Yang Qiuchi carefully examined the neck of the deceased.

Song Yuner came over to have a look, and asked, "Brother, did you find anything?"

Yang Qiuchi stroked his chin and thought for a while, then said: "Although the neck of the deceased had subcutaneous bleeding marks left by the friction of the iron chain, there was no trace of strangulation, and the iron chain was put on the neck instead of strangling the neck, so those The rubbing marks should be left by the friction of the iron chain when the deceased struggled, not the cause of death."

"There are no obvious signs of trauma on the surface of the deceased. Could it be that he was tied up with stones and thrown into the water and drowned alive? Or did he commit suicide?" Song Yuner imitated Yang Qiuchi, rubbing her chin and pondering, with a very sophisticated expression. look.

"We can't draw such a conclusion yet, because there is at least one place on the surface of the body that hasn't been checked, so check it first." Yang Qiuchi looked carefully at the dead man's hair, and suddenly, his hand stopped, "On the dead man's head There is a scalp laceration!"

"Let me see!" Song Yun'er leaned over to take a look, and sure enough, there was a crack about an inch long on the scalp at the back of the deceased's head, and when the crack was separated, a white skull could be seen.

Yang Qiuchi first measured the size of the gap, and then carefully distinguished the shape of the wound, and couldn't help but let out a gasp.

"What's wrong?" Song Yun'er stared at the wound, looking left and right, unable to understand.

Yang Qiuchi looked at Song Yun'er and said, "Yun'er, you have been with me for so long, and I have also taught you how to identify wounds. Take a look, what cut the deceased's wound?"

Song Yun'er put her head on the back of the dead man's head, looked at it for a long time, and said, "It doesn't look like it was cut with a knife."

Yang Qiuchi nodded approvingly: "Why?"

"You said before that the wound wall of a sharp instrument wound is smooth, and there is no inter-tissue bridge in the wound cavity. The wound wall is not very smooth." Song Yuner has a good memory, and she remembers all the forensic terminology that Yang Qiuchi said before. and know how to use it.

"Very good," Yang Qiuchi praised, "The wound was indeed not cut with a sharp object."

"What cut it?"

Yang Qiuchi used a scalpel to incise the scalp twice, exposing the wound, wiped the skull under the wound with a sweat towel, and said, "Look carefully, there is a thin fracture line, and the two sides of the fracture line are not scratched." Scratch marks. Since the hardness of the human skull is similar to that of copper, since the murder weapon did not leave scratch marks on the skull, it means that the hardness of the murder weapon is softer than copper, and it is likely to be a wooden stick or the like."

"Wooden sticks? Can wooden sticks cut wounds?"

"Ordinary wooden sticks are blunt instruments, and it is difficult to form such wounds. Therefore, this wooden stick should be diamond-shaped."

"Oh," Song Yun'er understood now, and asked again: "Then was this man beaten to death by this diamond-shaped wooden club?" Then he remembered what Yang Qiuchi said just now, this man drowned in the water before his death, how could it be possible He was beaten to death by a wooden club, and quickly changed his words: "No, it should be said that he was tied to a stone and drowned in the water after being knocked unconscious by a wooden club. Right?"

"Well, the blow from the murderer's wooden stick only caused a linear fracture of the skull of the deceased, which can cause trauma such as concussion or intracranial hemorrhage, but judging from the circumstances of the blow, it is unlikely to cause the victim's death on the spot. According to the autopsy just now, the deceased It was drowned, which means that the victim was still alive after being hit by the stick and before being submerged in the water."

"Then have you found any clues to the murderer?"

Yang Qiuchi smiled wryly: "You're always in such a hurry, I'm not a god, how can I know who the murderer is all at once. However, I already have a direction for detection."

"Really? What direction?" Song Yuner asked anxiously.

Yang Qiuchi walked to the side of the Ba River, observed the flow of the river for a while, and said, "Although the iron chains tied around the neck of the deceased tied up stones, the stones were not too heavy, and the flow of the Ba River was relatively fast. Should be able to wash the body down, so probably somewhere upstream, but not too far."

Immediately he ordered the policemen to go up both sides of the river and search carefully to see if there were any abnormal traces of blood or fighting. In addition, he brought back some water from here and within ten miles upstream in bottles at intervals, and had to be marked with water. Mark where it was extracted.

The detectives led the way.

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PS: With the strong support of the monthly tickets from all the bosses, the concubine army has thrown off some distance from the pursuers, but it must not be taken lightly.

It is reported that in the last few days at the end of the month, the following pursuers will make major moves, and it is estimated that motorized mobile units will be called to chase our army.The concubine army commanded that our army speed up the march and attack the No. [-] position for a long distance. If we can win the No. [-] position by the end of the month, it will be a decisive victory for our concubine army.

For victory, go forward!The heroic army of concubines! (To be continued, if you want to know what happens next, please visit www.CMFU.COM, more chapters, support the author, support genuine reading!)
(End of this chapter)