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Hatred is as bitter as honey¡¤10

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    The source of the surveillance incident cannot be found for the time being, and the investigation of the murder case has reached a critical period, so this "office storm" can only be put aside for now.  All our work focus shifted to the case in a very short period of time.

    After verification, it was found that the deceased was wearing "Anta" sportswear on the night of the incident. There was a reflective strip on the back, which was easy to identify. Pang Lei quickly locked the walking route of the deceased on the night of the incident.

    "She left from the west gate of the community." Pang Lei said, pointing to the direction where the deceased disappeared on the surveillance video.

    I took out my mobile phone and clicked on the electronic map: "The entire community is distributed in a ring. There are three gates in the west, south and east. Moonlight Plaza is located on the southeast side of the community. According to the distance of the route, the closest walk is from the south gate and east gate.  , but the place where the deceased lived happened to be at the west entrance, so I suspect she would have walked this way often."

    "Well, it's possible."

    "The total length of this road to Moonlight Plaza is less than one kilometer. The target length is not very large. Finding the first crime scene should not be a big problem."

    "Okay, just do as Xiaolong said. After lunch, we will set off."

    Two hours later, Pang Lei parked the survey truck at the exit of the west gate of the community. This was a cement road that had not been completely repaired. Its shape was like a cubic cement block laid flat on the road. Although the main body of the road was under construction.  It is basically completed, but both sides of the road are still littered with garbage and overgrown with weeds.  The cement road runs north-south, with both ends connected to a main road in Nanshan New District. With the west gate of the community as the boundary, we divided the road into two sections, the north and the south.

    The main urban area is located in the north of Nanshan New District. Many residents choose to enter the community from the north section after get off work, while almost no one cares about the south section.  The convenience of the investigation is that the deceased happened to choose the south section when leaving the community.  This was the rush hour for work, and not a single car passed through the south section. One can imagine how deserted this section of the road the deceased walked was usually.  The less visited it is, the more likely it is that the original outline of the crime scene will be preserved, which is undoubtedly a good thing.

    A road is divided into east and west sides according to the direction of travel. The deceased was walking. She could not follow the rules like a motor vehicle. To save trouble, the deceased could go in the opposite direction when leaving the community, or go to the other side and go forward.  also may.  In other words, either side could be her route.  After everything was ready, we divided into two groups according to road sections and began a carpet-like search all the way south.

    Before we walked far, Pang Lei stood on the opposite side of the road, picking his nose and turning to look at me.

    "Brother Lei, what do you mean?"

    "Do you think this is a skid mark?" Fat Lei rolled the booger into a ball in his hand and flicked it to the ground. The booger ball landed exactly in the middle of the two black marks.

    Hearing his call, I picked up the survey box and walked up to him a few steps. Lao Xian followed closely and took out a magnifying glass.

    "It looks like rubber." Lao Xian took out a shovel, took some samples from the ground and put them into the evidence bag.

    ¡°It¡¯s a unilateral brake mark, yes.¡± I came to the conclusion after observing.

    "It has been so many days since the crime occurred. How can you be sure that this trace was left by the suspect?" Ye Qian opened her mouth and asked.

    ¡°It¡¯s impossible to tell just by looking at the traces,¡± I said, standing up and walking to the curb, pointing to a pile of dented grass, ¡°but it¡¯s completely different with these traces as evidence.¡±

    "This is?" Everyone gathered around.

    ¡°This road is usually not visited by anyone, and there are not many people walking on it, but you can see that the weeds here have obvious signs of breaking. Judging from the messiness of the traces, there has been a fierce battle here.¡±

    "Xiaolong is right. Judging from the degree of oxidation at the break of the weeds, it basically matches the time period of the crime." Lao Xian said after squatting on the ground and observing with a magnifying glass.

    "Look, is this a shoe print?" Ye Qian pointed to a semicircular depression and said to me.

    I heard the sound and walked over: "The traces on the pressure surface of the forefoot are so obvious!"

    "What's the meaning?"

    "Although there is only half of it, I can be sure that this is a woman's shoe print, and she is wearing wedge shoes. This kind of shoe will lift the person's heel, and all the force will be concentrated on the toes when walking, so the pressure on the forefoot will  The traces on the surface will be very obvious. The soil here is soft, and if she had worn stilettos, there would have been dot-like heel marks left, but I didn¡¯t find any, so I speculated that she must have been wearing wedges.¡±

    "You mean, this is the first scene of the murder?" Ye Qian then asked.

    "According to our current analysis, it should be??¡±

    ¡°Xiaolong, can you analyze what kind of vehicle the suspect was driving?¡± Brother Ming glanced at the two unilateral traces on the ground that were in the pattern of ¡°¡ª¡ª¡± and asked.

    At this point in the on-site investigation, we can basically determine that the suspect moved the body to the deceased's home after killing someone here.  Even though it was night, she couldn't be brave enough to walk back with the body on her shoulders, so a body removal tool was involved.  The skid marks at the scene prove that he was driving a motor vehicle. If we can determine what kind of vehicle the suspect is driving, we can use the vehicle to find the person.

    "The reaction of this brake mark is not obvious. Battery vehicles, motorcycles, and cars can all form such brake marks, so it is not very easy to judge." I answered honestly.

    "Leave this to me." Lao Xian was confident.

    "Can this be detected?" Fat Lei was a little surprised.

    "Yes, I had nothing to do some time ago, and I studied this topic specifically." The lenses of Lao Xian's glasses flashed, as if Conan had already understood everything.

    "What kind of statement is this?" Pang Lei felt like breaking the casserole and asking the truth.

    "I used to think that the chemical composition of all car tires is similar, but in fact, the functions of each car are different, and the composition is also very different. According to the type, car tires can be divided into seven types."

    "Seven kinds?" Fat Lei said with wide eyes.

    "Yes, they are: pc - passenger car tires; lt - light truck tires; tb - truck and large tires; ag - agricultural vehicle tires; otr - engineering vehicle tires; id - industrial tires  Car tires; mc - motorcycle tires. According to general statistics, the approximate composition of tires is 50% rubber, 25% carbon black, 15% steel wire, and 10% zinc sulfide and sulfur additives. But these  This is just a rough estimate, and the composition of a tire will change accordingly based on its load capacity and the wear and tear of the tire tread."

    "Take the most common car tires as an example. The rubber used in them can be divided into four types, namely natural rubber, isoprene rubber, styrene-butadiene rubber, and butadiene rubber. In order for the rubber to have the properties required for making tires, it must  Various different chemical materials, called chemical additives, are mixed into the rubber. I can tell the type of vehicle that has skid marks based on the composition of the chemical additives."

    "This is simply a shortcut!" I gave Lao Xian a thumbs up.  (Remember the website address: www.hlnovel.com
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