"At about 8 o'clock yesterday morning, four bodies were found at No. 16, Shuangqing Lane, Dongguan Street, Yongchuan Town, and the informant was Lu Chunsheng, the brother-in-law of the head of the household Chen Zhiping and the younger brother of the hostess Lu Chunyan. According to Lu Chunsheng, he was going to visit his sister and brother-in-law's house yesterday and send his sister some home-grown fresh vegetables, but no one opened the door no matter how he knocked on the door, and the phone was turned off when he called his sister and brother-in-law, and the phone was turned off when he called his nephew Chen Mo, that is, Chen Zhiping's son, Lu Chunsheng was a little worried, so he climbed over the wall and entered the courtyard, looked in from the window of his sister's bedroom, and found that there were a lot of dried blood stains on the wall, and there was a corpse in the house, so he immediately called the police. ”

The local police station in Yongchuan Town immediately reported the situation to the Municipal Bureau, because the bureau leaders and Team Li were participating in activities in Yongchuan Town at the time, so the leaders of the Bureau commanded nearby, let the local police officers in Yongchuan protect the scene, and all the members of the criminal police team of the Municipal Bureau were on duty to join Team Li in Yongchuan, and specially approved Mr. Du and Dang Hui to participate. ”

"Now it's called Mo Anran. Li Xian interjected.

"Oh, I'm sorry, I forgot. Qu Mingming smiled apologetically at Mo Anran, and Mo Anran waved his hand to indicate that it didn't matter.

"Of the four deceased, two of them were buried in the cement pool where the family stored radishes and potatoes, which were highly decomposed and basically unrecognizable, and by reconstructing their mobile phones, it was confirmed that they were Chen Zhiping, the head of the family, and his wife Lu Chunyan, while the bodies on the floor of the bedroom did not find their mobile phones, and the preliminary speculation was that it was his son Chen Mo. The informant identified that the body found in the water tank of the warehouse was Chen Chen, the daughter of the head of the household. ”

"The cause of death of the two bodies in the kitchen was from blood loss after being cut with a sharp weapon, and the shape of the blade of the murder weapon was extracted from the arm bones of the deceased, which matched the kitchen knife found in the east wing. The body found in the other bedroom also had slash-like wounds, and Chen Chen had a strangulation mark on his neck, which was preliminarily judged to have died of suffocation. ”

"Let's talk about the distribution of evidence at the scene. Qu Mingming pulled over the whiteboard, and there was a sketch of the crime scene on it, "There are a total of eight buildings at the scene, namely the bedroom of Chen Lu and his wife on the main landlord side, Chen Chen's bedroom on the west side of the main house, the hall house in the middle of the two bedrooms, the kitchen behind the main house, Chen Mo's bedroom in the east wing, Yu Dalong's room in the west wing, the warehouse on the east side and the warehouse on the west side. Judging from the results of the analysis of the bloodstains at the scene, the first scene of the two bodies found in the kitchen should be the bedroom of Chen Lu and his wife, and then the murderer transferred the two bodies to the kitchen storage sink for burial, and the bodies in the bedroom showed no signs of moving. ”

Chen Chen was violated and killed in her own bedroom, and a shoelace was found at the head of the bed, the thickness of which was consistent with the strangulation marks on Chen Chen's neck, and it was preliminarily judged to be the murder weapon that killed Chen Chen. The deceased's YD was found to contain sodium hypochlorite, which was suspected to be 84 disinfectant, and due to the strong oxidation of sodium hypochlorite, the J Y residue in YD could not detect DNA. Sodium hypochlorite was also detected on the ground of the warehouse on the east side, which should have been spilled by the murderer when he poured 84 disinfectant into Chen Chen's YD in the warehouse. There is also the fact that the murderer was very cautious and cleaned all fingerprints, or rather, he was wearing gloves to commit the crime at all. ”

Li Xian said: "Tell me about the suspect's situation. ”

"Okay, at present, it has been preliminarily determined that Yu Dalong, the tenant who rents the wing on the west side, is suspected of committing a major crime. Yu Dalong, male, 29 years old, worked in a cleaning company in Yongchuan Town before the incident, engaged in the outsourcing of daily cleaning of B&Bs in Yongchuan Town, to put it bluntly, it is to clean B&Bs, the cleaning company is not very formal, and even Yu Dalong's ID card information has not been left, and he is still checking. After the incident, this person lost contact, and Yu Dalong's mobile phone is currently turned off. And we found a small half bucket of 84 disinfectant in Dalong's room, which had no fingerprints on it. ”

"Can you determine the time of the crime?" asked Li Xian.

Wang Jieshu replied: "We asked the neighbors, and they reported that the last time they saw the family was on the morning of the 3rd of this month, and Chen Chen's classmates said that the 3rd was Sunday, and Chen Chen was doing his homework at his classmates in the afternoon and went home by himself at about 4 o'clock. Chen Chen's homeroom teacher said that at around 9 p.m. on the 3rd, Chen Zhiping had sent a message to Chen Chen's homeroom teacher, which was to ask Chen Chen for sick leave. However, we speculate that Chen Zhiping should have been killed at that time, and this message is believed to have been sent by the murderer using Chen Zhiping's mobile phone. Based on the above information, coupled with the results of the water forensic autopsy, we preliminarily judged that the time of the crime should be from the afternoon of the 3rd to the early morning of the 4th. ”

"Water forensics, tell me about the autopsy. Li Xian asked Shui Guochang again.

"The two bodies found in the kitchen were buried in the soil, so the decomposition was relatively severe, and the skin, muscles and internal tissues were basically decomposed, and the injuries could only be judged by the deep wounds to the bones. The female deceased, Lu Chunyan, was slashed by a kitchen knife on her collarbone, and it is inferred from the position that the knife should have cut the carotid artery, causing massive bleeding, and this single knife alone was enough to kill. The male deceased, Chen Zhiping, had multiple defensive wounds on the radius of his arm, a knife cut on his sternum, and multiple knife cuts on the front and side of his skull. The other male deceased Chen Mo in the bedroom, there was a knife cut on the back of the head, but the width of the wound should be the back of the knife, not the blade, there were signs of massive bleeding under the cerebral dura at the wound, which should have been hit the back of the brain by the back of the kitchen knife, resulting in a cerebral dural hematoma, and then the hematoma ruptured and died, and the residue of 84 disinfectant was also detected on the corpse, and because of this, although the corpse was decomposed, there were no maggots. The situation of the female deceased has just been introduced by Qu Mingming, and I will add a few more words, in addition to a deep strangulation mark on the neck, there is also a layer of bruises caused by pinching the neck with both hands under the strangulation marks, and there are also several bruises on other parts of the body, which are caused by life reactions before death. ”

"Dr. Du, please tell me about the blood analysis. ”

Du Lin didn't drink the blood this time, because the time of death was obviously more than twenty-four hours, and there would be no "illusions" after drinking the blood, so the blood was tested by instruments, and fortunately, he would use these instruments.

Du Lin asked Mo Anran to turn on the projector, and the policeman sitting by the window closed the curtains, "Because there are many blood stains at the scene, there are 35 groups of blood samples that are relatively independent at different locations at the scene, which belong to 5 people." ”

Du Lin said as he switched the picture on the projector with the remote control, "The splatter-like blood stains formed by the artery spraying on the mattress, quilt and wall in the east bedroom belong to Lu Chunyan, the wife of the head of the household, which is also consistent with the autopsy results of the water forensic doctor, and some of the blood-like blood stains on the ground also belong to her." ”

"The blood stains thrown on the ground, on the wall and on the furniture belong to Chen Zhiping, and they should be formed by the blood thrown out of the knife when the murderer slashed at Chen Zhiping many times. There were two small blood stains at the door of the bedroom, which belonged to Chen Mo and Yu Dalong, respectively, and they were probably injured during the fight. ”

The picture switched to Chen Chen's bedroom on the west side, "There are a small amount of wipe-like blood stains on the cabinets and drawers in this room, which belong to Yu Dalong, probably after being injured in the fight with Chen Mo, when he rummaged through his belongings, his blood was stained on the handles and other places." ”

"The east wing room, like the previous one, had only a small amount of blood in the form of a wipe. At the scene, Chen Zhiping, Lu Chunyan and his wife had a lot of bloodstains, but Chen Mo and Yu Dalong had very little blood, and even I felt that Chen Mo shed less blood than Yu Dalong, and I speculated that the cause of Chen Mo's death should be caused by a heavy blow to the brain, not excessive blood loss. ”

"Chen Chen, who was found in the warehouse, did not have much blood because she died of suffocation, but a small amount of impregnated blood stains on the bed in her bedroom confirmed that it was hers, and it should have been YD bleeding when she was violently violated. ”

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