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Parasitic evil thoughts · Thirteen

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    Because this complicated murder case was investigated by our department, the reporting work was still focused on our department. I looked at each other with several trace inspectors from the sub-county bureaus. After making sure that no one had any doubts, I said: "Su  The murder case of Hang has passed by and there are basically no traces left at the scene. Our trace inspection team mainly conducts investigations around the murder case of Li Yanmei. There are 4 bungalows in the courtyard, namely the main room, bedroom, storage room and kitchen.

    "Just now the forensic team has introduced that the first scene where Li Yanmei was killed was the kitchen. We extracted a series of blood footprints in the kitchen. After calculation, it can be determined from the size of the shoe prints, the characteristics of the stride length and the characteristics of the step angle.  From the perspective of trace examination, Li Yanmei was indeed killed by Su Yu. There were large blood stains on the kitchen floor. After killing Li Yanmei, Su Yu directly dragged the body outside the hospital for burial.

    "Then, we extracted the shoe prints of the suspect in the 'Headless Floating Corpse Case' in front of the earthen grave in the courtyard. The shoe prints were relatively new. By observing the cracking degree of the three-dimensional shoe prints, we found that they were no more than 1 month old. There were traces of kneeling in front of the grave.  Obviously, the suspect kowtowed in front of Li Yanmei's grave. Based on the condition of the shoe prints and the time of Su Yu's murder, the suspect should have returned here to kneel down not long after killing Su Yu. Our trace inspection team speculates that the suspect  It was revenge for Li Yanmei.

    "The tablet in front of the grave is written with hemp rope dipped in paint. The writing is very irregular. The writing of 'Grave of my daughter Li Yanmei' has writing errors, which reflects the suspect's low writing skills and low cultural level. The vegetables around the grave bag  There are traces of shovels on the ground for retrieving soil, indicating that Li Yanmei's tomb has been renovated.

    "In addition, we also extracted a large number of fingerprints indoors. Through comparison, one of the fingerprints and the fingerprints on the stone bridge three-ring lock surface can be identified as the same. This further confirms that the female murderer who killed Su Yu did go there.  Cross Suoqiao Village. There are only so many trace inspection teams for the time being."

    Brother Ming: "The physical and chemical inspection team will introduce the situation."

    Lao Xian took out a stack of test reports: "Our physical and chemical team first determined the blood relationship between Su Hang and Su Yu through DNA. After testing, the two were brothers. Then, I extracted the crime tools at the first scene of Li Yanmei's murder.  ——The fruit knife has Su Yu's DNA on the handle and blade, which is enough to prove that the murderer of Li Yanmei was Su Yu.

    "Subsequently, we found many weeds on Li Yanmei's grave." Lao Xian said, showing a photo of the weeds on the projector, "When this grass grows, it has seven leaves, also called seven leaves.  Grass. According to the climate and environment of Suoqiao Village, it takes about 20 days for grass to sprout and grow all its leaves. We pulled out all the horse chestnuts from the grave bags and found that the root systems basically develop in the same cycle.  It was judged that the grave was dug for the second time about 20 days ago, which coincided with the time of Su Yu's murder.

    "The results of the physical and chemical examination are also as everyone speculated: after killing Su Yu, the suspect came to this yard, rebuilt the grave bag for Li Yanmei, and wrote the tombstone. After measurement, the height of Li Yanmei's grave bag was 1.5  meters, 2.2 meters long. It is definitely a physical job to pile such high grave bags. At the time of the incident, the outdoor temperature was around 30 degrees Celsius. The suspect piled soil in hot weather, which would cause severe dehydration in the body. In the yard  The only water-drawing tool available is to kill the well, and the rubber of the well has long been corroded because it has not been used for a long time.

    "Then if the suspect wants to drink water, he can only go to a small shop to buy it. Suoqiao Village is relatively closed and few outsiders enter, so we found the only canteen in the village. The owner of the canteen is an elderly man. According to him  Introduction, more than 20 days ago, a foreign woman did come to his store and bought 4 bottles of mineral water. Although there were many people going to his store to buy water, the uncle was very impressed by this woman because she later  After drinking the four empty bottles, they were sent back to the uncle. The woman told the uncle that it was not easy to do business in the village and asked him to keep the bottles and sell them for some money.

    "A drink bottle can be sold for 1 cent at most, and transportation in the village is inconvenient, so the old man always waits for more drinks bottles to be sold before selling them. Fortunately, the pile of drinks bottles has not been sold yet. Our physical and chemical team collected all the more than 100 empty bottles  After buying it, after testing, we found the same female DNA on four of the bottle mouths, and the woman was identified as mother and daughter to the deceased Li Yanmei. In other words, the person who killed Su Yu was Li Yanmei's biological mother."

    By this point in the project meeting, we have basically smoothed out the causal relationship: brother Su Hang was killed first, then brother Su Yu killed sister-in-law Li Yanmei, and finally Li Yanmei’s mother killed Su Yu to avenge her daughter.

    Who is Li Yanmei’s biological mother has become the key to solving the case.  (Remember the website address: www.hlnovel.com
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