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The Rebirth of the Immortal Girl ¡¤ 10

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    Lao Xian cleared his throat and picked up an evidence bag from the table: "This is some burning residue I extracted from the garbage pool under the identification of the deceased's daughter Hu Yuan."

    "This is¡­¡­?"

    "Isn't this an old version of the train ticket?" I answered before Ye Qian could say anything.

    "right."

    "It's all burned like this, what can be analyzed?" I looked at the pile of red train tickets burned to the corners in the evidence bag of Lao Xian with some confusion.

    "It's good that the string of codes under the train ticket was not burned. I used this string of codes to analyze where the deceased had been." Lao Xian said calmly.

    "What? Is this okay?" Fat Lei's eyes widened.

    Lao Xian pointed to a dense string of numeric codes under the ticket and said: "We often use train tickets, but many people may not have noticed the meaning of this long string of codes. This string of numbers is actually calculated from a variety of information.  A string of numbers. The 1st to 5th digits represent the station code where tickets are sold; the 6th digit represents the ticket point type, 0 represents the station ticket office, 2 represents the sales agency; the 7th to 10th digits represent the number of the ticket window  ; The 11th to 14th digits indicate the date the ticket was sold; the last 4 digits are the mileage between the starting station and the final station on the ticket. Fortunately, the deceased chose to buy tickets in our Yunxi City every time and get on the train.  Through this digital information, I can basically deduce the destination of the deceased every time he traveled. In order to ensure that there were no mistakes, I specifically contacted my colleagues at the station police station. After their verification, I found that the deceased often traveled in and out of Yunbei Province, Guizhou  In these two provinces, all the information that can be found shows that she goes there almost every year.¡±

    Based on the information we have now, this case is likely to be a vendetta.  The deceased had been cheating everywhere, so the contradiction of the vendetta was also very prominent.  However, the deceased only accepted "soul-calling" jobs in our Yunxi City. The fee for such a job was only a hundred yuan, which basically did not constitute a motive for murder.  In this way, the possibility of locals committing crimes is very small.  Therefore, the focus of the case investigation must shift to the deceased's overseas relationships.  But the difficulty is that no one can tell clearly where the deceased has been and with whom he has grudges.  Although Lao Xian's analysis results are somewhat general, they can be regarded as pointing us to a clear path.

    When Lao Xian saw that we all stopped writing, he then said: "The following is a large amount of fiber evidence." He opened several reports in front of him and introduced: "I have extracted a total of three types of fiber, and used the sodium hydroxide experiment method to confirm three types of fiber.  The fibers are all animal hair.¡±

    Human hair can basically be seen at a glance, so there is no need to rule it out.  But with the improvement of people's living standards, raising various small animals at home has become a common phenomenon.  Ordinary families keep a dog, cat, etc., while families with good economic conditions will keep some higher-end pets, such as chinchillas, miniature pigs, etc. which are very popular now.

    Animal hair is also common at crime scenes.  The hair of some animals is not like hair that can be identified with the naked eye. They are often mixed with some textile fibers. In order to distinguish them, a test is required, and the use of sodium hydroxide is the most commonly used method.

    As we all know, animal hair contains protein components. The main principle of the experiment is to use the strong alkalinity of sodium hydroxide to react with the keratin in the hair. If the fiber contains protein, it will be corroded and dissolved quickly.  This is also the working principle of some chemical hair removal creams on the market.

    Lao Xian did not pause: "The first type of fiber is nearly round when viewed from the cross section. When viewed from the longitudinal section, it is composed of a kind of scale-like keratinocytes. According to the fiber map comparison, it can be determined to be wool."

    "The second type of fiber looks like grid-shaped squares when viewed from a cross-section. It is relatively neatly arranged and looks a bit like a metal watchband. It is analyzed as rabbit hair. I found these two fibers on a nail at the head of my bed. According to their morphological characteristics  It is inferred that it should have been scratched from the suspect's clothes. My conclusion is that the suspect was wearing a piece of clothing blended with wool and rabbit fur when committing the crime, and rabbit fur accounted for a large proportion. Can you based on this?  Analyze the suspect¡¯s clothing style?¡±

    Lao Xian¡¯s meaning is very simple. If the suspect¡¯s clothing characteristics can be analyzed, then there will be a starting point when investigating the surveillance video.

    After hearing this, Brother Ming shook his head: "If wool and rabbit fur have not been dyed, the original color should be white. We cannot judge the thickness of textile clothing. If the suspect was wearing a coat when committing the crime, even if we analyze the sweater style,  It doesn¡¯t help.¡±

    Lao Xian nodded and did not dwell on this. He continued: "The third fiber, I didn't analyze what kind of animal hair it is."

     "What? It wasn't analyzed?" Ye Qian was the first to shout.  She had this reaction mainly because this was the first time she had encountered this kind of situation in more than a year of internship in the department, and for us, this is nothing unusual.  No one is perfect, and the wise man is not a god. He cannot master all knowledge. If we encounter problems that he cannot solve in a case, we will also find some experts in the field.

    ¡°Okay, let¡¯s put this here for now, and we¡¯ll figure it out after the meeting.¡± Brother Ming motioned to Lao Xian to continue.

    Lao Xian adjusted his glasses: "Although I don't know what this kind of hair is, I am sure that it should have fallen from some kind of tool, because the hair is most concentrated on the ground just below the deceased's left wrist.  , and the way of falling is natural shedding.¡±

    In some cases, the state of the fibers can also reflect the circumstances of the crime. For example, clumps of hair found at the crime scene can reflect that a fight has occurred indoors; another example is in a rape case, if the victim's body is  The discovery of some fabric fibers in the nails can prove that the victim has violently resisted; so sometimes it is necessary to study not only the composition of the fibers, but also its state.

    Lao Xian opened another one and said: "This is the report of the deceased's blood volume weighing experiment."

    "What do you mean? Weighing experiment?" This was also the first time I heard this term.

    "Yes, on-site blood stain examination is my field of work, and I have a clearer understanding of it. During the autopsy, Ming Ge has determined that the deceased leaked at least 4,000 ml of blood. According to my observations at the scene, the deceased's clothes and added  The total amount of blood on the bedding was not that much. I suspected that the suspect took a certain amount of blood from the deceased. In order to confirm my idea, I found bedding that was exactly the same as the one at the crime scene, as well as the same brand on the deceased.  , clothes of the same style were weighed. After comparing the weight difference between the two, my inference was confirmed. The amount of blood at the crime scene was only 3000 ml. In other words, the suspect took it from the body of the deceased.  1000ml of blood.¡±

    Such an explosive conclusion was stated by Lao Xian in a straightforward manner. Looking at his calm expression, I was also drunk.

    Lao Xian continued: "If my guess is correct, the suspect squatted on the left wrist of the deceased to take blood. The animal hair that I did not analyze the ingredients just now was all concentrated at the place where the suspect took blood, so I suspect  He was holding a skin bag made of animal fur in his hand, and the capacity of the skin bag was greater than 1,000 ml."

    ¡°That¡¯s awesome!¡± This was my first reaction.

    "The skin bag is soft and easy to deform, and it is very convenient to carry. If the suspect is carried in his arms, it will be difficult to be detected during surveillance." Pang Lei curled his lips.

    "What is the last report?" Brother Ming asked.

    "This is the particulate matter I extracted from the deceased's bed. It was attached to the suspect's socks and was in large amounts. There are two types of particulate matter. The first type is spherical, with an 'equatorial outline' visible, and has inner and outer walls. The main component of the inner wall is  Pectin cellulose, the outer wall is sporopollenin. Judging from this, it should be the pollen grains of some kind of plant."

    "The second type is in the shape of irregular crystals. It should be fine particles of a certain landform and soil structure. It is a bit like sand, but the composition is different, and I can't distinguish it. There are only so many here."

    The problems that Lao Xian cannot solve include the three major disciplines of zoology, botany, and geology. They have not invited foreign aid for more than two years, and now they have to hire three.  This isn't solving a crime, it's simply a scientific competition.  I smiled bitterly in my heart.

    "Okay, let's take a two-step approach next. Ye Qian, please inform the brothers in the criminal police team to focus on investigating the deceased's local relationship network and conduct a thorough investigation of the interfering factors that can be eliminated."

    "clear."

    "Guoxian, are there any solutions to the three problems you can't solve?"

    "Provincial City University of Science and Technology Research Institute."

    "Okay, you should hurry up and get in touch now. As long as the negotiation is completed, we will leave immediately with the samples."

    "Okay!" (Remember this website address: www.hlnovel.com
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