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Desperate Tofu ¡¤ 5 The extensive and profound traceology

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    Directly north of the yard are three tile-roofed houses side by side. The larger one in the middle is the main room. Next to the east side of the main house is a tile-roofed house with an area of ??about 50 square meters. Looking out the window, a large earthen  The pot is placed among them, and there are pots and pots surrounding the pot. It is obvious that this is the place where tofu is made in the deceased's home.

    On the west side of the main room is the location where the body was found, a high-ceilinged warehouse.

    "Let's take a look at the body first." Teacher Li Feng said to me after finishing handling the shoe prints in the yard.

    "Okay." I nodded.

    The door of the warehouse faces south and is made of wood. The door is unlocked. Teacher Li Feng took out the revealing liquid he prepared and sprayed it on the wooden door. Several fingerprints appeared in front of me.

    ???????????????? Click, click, click, after a few camera shutter sounds, the wooden door was pushed open.

    Accompanied by the smell of corpses, the scene inside the house was panoramic.

    On the log of the beam, there was a nylon rope loop as thick as a little finger hanging. The head of an old woman in her 50s was hanging in the rope loop, lifeless.  The old woman's face was congested and swollen, her eyes widened and stared into the distance, a tongue stuck out of her mouth, and yellow viscous liquid oozed from her eyes, nostrils, ears, and corners of her mouth.  Maggots squirmed back and forth on the corpse's face.  The neck of the corpse has been stretched and deformed, looking very scary.

    The deceased was wearing a white long-sleeved shirt, a pair of gray trousers, and a pair of white cloth shoes.  A wooden bench was placed directly under the body.

    "Do you see what's wrong?" Teacher Li Feng stood by the door, frowning and turned to ask me.

    "I can tell." I glanced at the corpse and nodded.

    After finishing speaking, Teacher Li Feng lowered his head and glanced at the ground. At this time, my eyes also looked down as he did.

    "Hey, what is that stuff on the ground?" I asked, pointing to the withered and yellow straw all over the ground.

    "It's dried soybean straw." Teacher Li Feng answered as he picked up one and put it in front of my eyes.

    "Why should we spread this straw on the ground?" I took the straw and observed it carefully in my hand.

    "Just look at the things piled up in this room." He pointed to the grain piled up against the wall in the room.

    I glanced at the piles of sacks and said, "You mean the soybeans in this room?"

    "Yes, soybeans are most afraid of getting damp. This dried straw has strong water absorption, so villagers here usually spread this straw on the ground to prevent the ground from returning to moisture on rainy days and causing the soybeans to germinate and deteriorate." Teacher Li Feng said  My side explained seriously.

    "Wouldn't it mean that there are no shoe prints on the ground?" I said with some disappointment.

    ¡°That¡¯s basically it, let¡¯s just go in and see the body.¡± Teacher Li Feng put on a mask and walked into the house first.  I threw away the straw in my hand and followed him.

    "Xiaolong, tell me what you just discovered." Teacher Li Feng stood next to the bench in the room, looked up at the body and said.

    At this time, I walked to the feet of the corpse and said:

    "The beams of this warehouse are at least four meters from the ground. The total length of the corpse is only 1.6 meters at most, and the height of the bench at the foot of the corpse is at most 70 centimeters."

    As I said that, I flattened my right hand, compared the position of the corpse's feet, and said, "I'm standing on the ground, and the corpse's feet are exactly up to my forehead. In other words, the distance between the soles of the corpse's shoes and the ground should be about 1.7 meters.  If the deceased had hanged himself by stepping on the bench, he would not have been able to catch the rope loop on the beam."

    "Yes, no wonder the comrades at the police station said that there was something strange at the scene. It seems that this is the reason." Teacher Li Feng answered while holding his chin and looking at the corpse.

    "Can we judge from this that he killed him?" I asked, standing next to Teacher Li Feng.

    "Now that the forensic doctor is not here, I can't dissect the body to determine the cause of the deceased's death. I can only solve it from the traces. Let's ignore the corpse for now. Just now, the comrades from the police station said that there were traces of being disturbed in the deceased's home. Let's see where we can find out.  We can¡¯t find a breakthrough." Teacher Li Feng made up his mind and said to me.

    "Okay!" After saying that, I picked up the box and followed him towards the door.

    A minute later, our master and apprentice stood in front of the door of the main room. The door of the main room was a double wooden door. The door lock was in good condition and there were no signs of being broken. After the teacher briefly handled the door, he pushed it open.  Door.

    The main room is divided into three areas. As soon as you enter the door, there is the living room. A wooden table is placed due north of the living room, and two wooden chairs are placed on both sides of the wooden table.  On the east side of the main room is a roomIn the bedroom, there is a wardrobe on the west wall of the bedroom, and a wooden single bed on the east wall. Men's clothes can be seen scattered everywhere in the room. Apparently this is the bedroom of the deceased's son.

    The west side of the main room should be the bedroom of the deceased. In the bedroom, there are a double bed, two large wardrobes, sewing machines, dressing tables and other items.

    At this time, the house was in a mess, all the closet doors were opened, and quilts, clothes, and sundries were thrown everywhere.

    ¡°I¡¯m dizzy, it feels like I¡¯ve been raided.¡± I stood outside the door and looked around in surprise.

    "Looking at this situation, there should be a thief. Let's look at the ground first." After finishing speaking, Teacher Li Feng squatted down habitually.

    The house is paved with flat and smooth ceramic tiles. Compared with the yard, shoe prints here are much easier to extract.

    Teacher Li Feng closed the door, waited for the light in the room to dim, and took out the strong footprint lamp from the box.  In fact, the simplest way to detect footprints is to use the principle of light reflection.

    Taking this case as an example, the floor of the site is a smooth tile surface. If there are shoe prints on the ground, you only need to shine a strong footprint light on the ground.  Smooth ground, like a mirror, can reflect light in parallel directions. Ultimately, this dazzling parallel light cannot reach our eyeballs.  Shoe prints on the ground are different. They are rough surfaces, so light will be reflected in all directions when it hits them. This phenomenon is also called diffuse reflection.  This irregular reflected light has a high probability of re-entering our eyeballs, allowing us to see the shoe prints on the ground clearly.  In addition to professional footprint lights, ordinary flashlights can also be recognized by the naked eye.  And the darker the light is, the clearer the shoe prints can be seen because they can avoid interference from other lights.  Therefore, Teacher Li Feng closed the door as soon as he entered the room in order to create the effect of a dark room.

    "Huh?" Teacher Li Feng asked.

    I saw him staring at the string of shoe prints at the door, changing directions back and forth, frowning, so I asked, "What's the matter, teacher? Is there a problem?"

    "Yes, there is something wrong with this shoe print!" Teacher Li Feng replied, pointing to the shoe print.

    "What's wrong with the shoe prints?" I leaned my head over curiously and took a look at the block-shaped sole prints.

    "If my guess is correct, this shoe print is a disguised shoe print!" Teacher Li Feng turned the footprint light in his hand to the strongest setting and observed it carefully again, and said to me.

    "What? Disguised shoe prints? How can you tell?" The more I listened, the more confused I became.

    Teacher Li Feng found an open space without shoe prints and placed the footprint lamp parallel to the ground. The light was just enough to clearly reveal a string of dust-layered shoe prints. Then he took out a telescopic ruler from the survey box.  He picked up his teaching staff, pointed to the edge of the shoe print and explained to me:

    "Disguise often occurs at a crime scene. The most common thing we are exposed to is wearing gloves and wiping fingerprints, but with the development of the times, people hear and see more and more, at crime scenes  There is also the phenomenon of camouflaging shoe prints. Generally speaking, it can be divided into two types, the first is called 'small feet wearing big shoes', and the other is called 'big feet wearing small shoes'."

    "Let's first talk about the first situation of 'small feet wearing big shoes'. Since the suspect's feet are relatively small, all the gravity of the body is concentrated in the middle of the shoe print. This will cause the pattern in the middle of the shoe print to be very clear.  And the pattern on the edge of the shoe will be a little blurry.¡±

    "The second situation is 'big feet wearing small shoes'. The suspect is wearing shoes that squeeze the feet, and the gravity of the human body will be concentrated on the edges of the shoes. This will cause the middle pattern of the shoe print to be blurred, while the mark on the edge of the shoe will be very clear.  "

    "Teacher, I don't understand why, when 'big feet wear small shoes', the gravity of the human body is concentrated on the edge of the shoe? Isn't it always one foot stepping on the shoe? According to the principle of gravity, the entire sole of the shoe should be affected  Strength is what it is!" I squatted aside and tilted my head, asking seriously.

    After hearing this, Teacher Li Feng stood up and found a men's sneaker from the house, held it in front of me, then he took out the blue foam insole from the shoe and explained to me:

    "Because normal people have arches on the soles of their feet, well-fitting shoes can basically fit the feet completely, so people feel comfortable when walking. But if they are small shoes, the arch position cannot fit properly and is in a suspended state. The human body's  Gravity will be dispersed around the soles of the feet, so the phenomenon I mentioned will occur."

    "What if you have flat feet and no arch?" I took a look at the sneakers and looked like I was asking the question.

    Teacher Li Feng smiled knowingly and said: "The flat feet you are talking about are also called arch collapse. Only severe patients will have no arches at all. Patients with severe flat feet will compress the nerves and cause pain when walking, let alone wearing a shoe that squeezes the feet.  Shoes. And if you have flat feet, the shoe prints won¡¯t look like this. This also involves gait characteristics, which I can¡¯t explain clearly in a sentence or two. When this case is over, I will analyze it in detail for you.  ." After saying that, he put the insoles back into his shoes and patted the dust from his hands.

    "There is so much knowledge here." I stood up and put the shoes in his hands back to their original places, sighing.  (Remember the website address: www.hlnovel.com)??, only severe patients will have no arch at all.  Patients with severe flat feet will compress the nerves and cause pain when walking, let alone wearing shoes that squeeze the feet.  And if you have flat feet, the shoe prints won't look like this. This involves gait characteristics, which I can't explain clearly in a sentence or two. When this case is over, I will analyze it in detail for you.  "After that, he put the insoles back into his shoes and patted the dust on his hands.

    "There is so much knowledge here." I stood up and put the shoes in his hands back to their original places, sighing.  (Remember the website address: www.hlnovel.com
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