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Flower Nightmare ¡¤ Forty

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    Two days have passed since the investigation of the case. Since the investigation does not require the participation of our department, it has given us a little breathing space.  Although there is no work at hand, our hearts are not relaxed at all.  In order to ensure that the investigation of the case is meticulous, Brother Ming and Lao Xian have repeatedly conducted small-area re-examinations of the scene in the past few days.  Fat Lei spent all day in the office sorting out and screening more than 200 gigabytes of video from the scenes of the three cases.

    ¡°The only people who are truly empty-handed and relaxed now are Ye Qian and I.

    On the fifth day after the incident, Ye Qian walked into the office early in the morning with her head hanging down.

    "What's wrong? Someone messed with you?" I rolled up my sleeves and pretended to defend her.

    "My wallet is lost!" Ye Qian sat down on the chair in frustration.

    I looked her clothes up and down.

    ¡°You wear this tight-fitting little jacket every day, the pockets are so shallow, and you ride so fast, it would be strange if it doesn¡¯t fall off.¡±

    Ye Qian rolled her eyes:

    "You're looking for a fight, right?"

    "Okay, no kidding, what's in your wallet? Are there any valuables? Where did you lose it?"

    ¡°It¡¯s just a few hundred dollars and an ID card.¡±

    "I'm dizzy. I thought it was such a big deal. I don't think you can get the money back. I just need to apply for a new ID card. It only costs 20 yuan!"

    "Does it take at least two months to apply for an ID card? I originally wanted to go out for fun during the annual vacation, but where can I find the time?"

    ¡°That¡¯s okay, you go get a temporary ID card first, and then go to the police station to get a formal one, without any delay.¡±

    "Seriously?" Ye Qian's mood turned from gloomy to bright.

    ¡°Anyway, I have nothing to do now, so I¡¯ll go with you!¡±

    "You have some conscience!" Ye Qian took out a motorcycle helmet from the metal cabinet and threw it to me.

    Before we even reached the stairwell, we bumped into Lao Xian who had just come out of the laboratory.

    "Xiaolong and Ye Qian happen to be here, please help."

    "What's the matter, Brother Xian?"

    "Help me put the remaining examination materials in the evidence room. They are no longer needed now!"

    The remaining test materials in Lao Xian¡¯s mouth are easy to understand. They are the remaining physical evidence after the examination.  For example, when we extract blood stains at the scene, in order to obtain sufficient DNA information, we often extract a large amount at the scene, but for actual inspection, we may only need a small amount, and the rest are called remaining test materials.  Things cannot be discarded even after the investigation of the case is over. They must be preserved for a long time. The same goes for other physical evidence accompanying the case.

    The place dedicated to storing these things is called the evidence room. Generally, the evidence room is divided into several functional areas, such as evidence racks, refrigeration areas, and firearms and ammunition storage areas.

    The evidence rack is a bit like a supermarket shelf. On it are some more conventional physical evidence, such as the soil at the scene, the shoes worn by the suspect, etc. As long as the physical evidence does not deteriorate over time, it can be placed directly.  On the evidence shelf.

    The refrigerated area is mainly used to store some easily perishable physical evidence, such as blood samples, human tissues, semen spots, saliva spots, etc.

    Some cases will also involve firearms and ammunition. These physical evidence must be specially preserved to prevent the firearms from rusting and misfiring over time, so we have also set up a special firearms and ammunition storage area here.

    When I heard that Lao Xian had something to do, I had no choice but to look at Ye Qian with questioning eyes.

    ¡°Anyway, we¡¯re not in a hurry right now. Let¡¯s go after helping Teacher Guoxian finish it.¡±

    "I think so too!" I happily followed Lao Xian into the laboratory.

    Lao Xian led us to a long cabinet with a black marble countertop. This cabinet was a bit like a cabinet at home, except that the cabinets were filled with dishes and chopsticks, while the cabinets were filled with long, round chemical test tubes.  .

    ¡°Sperm spots, feces, and cigarette butts are refrigerated, while incense ash and rice are put directly on the shelves.¡± Lao Xian pointed to a pile of evidence bags on the table and said to me.

    ¡°Don¡¯t worry, Brother Xian, this is all done with ease and you won¡¯t make mistakes.¡± I picked up the silicone gloves from the table and said with a smile.

    "By the way, the cigarette butts at the scenes of the three cases must be packed separately, you know, right?"

    "Single package or multiple packages?"

    "one!"

    Ye Qian stood between me and Lao Xian, looking at me and Lao Xian for a while. From the doubts on her face, I could guess that she didn't understand what we were talking about at all.

      Let me explain it to you from the beginning.  The "separate packaging" in Lao Xian's mouth means separate packaging, that is, the cigarette butts at the scene of each case are registered and packaged separately. Just because these three cases were committed by one person, you cannot put all the cigarette butts together, otherwise, for several years  Finally, who can remember clearly which types of cigarette butts were extracted from which case?  This is easy to understand.

    "Multiple packages" and "single packages" are actually not difficult to understand. "Multiple packages" means that physical evidence of the same nature is placed in one evidence bag, such as the clothes and shoes worn by the suspect. Generally,  All are "multi-package" (except for special circumstances).  And "single package" means to package the physical evidence separately.  Take the cigarette butts in this case as an example. Although the suspect's saliva stains are all left on the filter, if you store all these cigarette butts together, it will cause the transfer of DNA substances. Over time, all cigarette butts will be  Contaminated, resulting in only one type of DNA being detected.

    ¡°There is no lack of re-identification in the process of handling cases. Sometimes this re-identification will last until one year or even several years later, because the trial time span of murder suspects is very long.  If a few years later, someone asks for a re-identification, but our physical evidence is contaminated due to improper preservation, then people will have doubts about the previous inspection and identification, which will allow some people with ulterior motives to take advantage of the loopholes.

    Therefore, in order to prevent such things from happening, Lao Xian adopts the "single package" method for many physical evidences, that is, one cigarette butt and one physical evidence bag, marked with serial numbers, and stored in categories.

    After getting the exact answer from Lao Xian, I started to move Luo Yeqian to get the small evidence bag. I put on a mask and gloves and picked up the cigarette butt with a small section cut off with tweezers.

    I didn¡¯t read Lao Xian¡¯s inspection report, so I only knew that the cigarette butts were extracted on site, but I had never seen the true appearance of these cigarette butts in Lushan before.  When I picked up the first cigarette butt, I began to be a little confused, because I found traces of my subject area on the cigarette butt - teeth bite marks.

    After I put the first cigarette butt in the evidence bag, I started to pick up the second, third, fourth My heartbeat was beating faster and faster with the movements in my hands, because I discovered that everyone was  An overlooked problem, and this problem is likely to be directly related to solving the case.

    "Brother Xian, do you have complete photos of these cigarette butts? Show them to me."

    "Yes, it's on my computer."

    ±»-, the photo was quickly printed from the computer.  My eyes widened and I looked back and forth at the photos in my hands.  When everything was confirmed, I couldn't be more excited.

    "Ye Qian, Brother Xian, come to the conference room, I have made an important discovery." I no longer bothered to sort out the physical evidence, but called Brother Ming and Pang Lei over.

    "What's wrong, Xiaolong? What did you find?" Fat Lei yawned.

    "Look at this!" I said and placed the photo in front of the four of them with the ink not yet completely dry.

    "Isn't this just a photo of a cigarette butt? What's different about it?" Ye Qian glanced at it.

    "We have only noticed the DNA information on cigarette butts before, but we have ignored the most important point."

    "Which point?" Brother Ming looked serious.

    "Teeth bite marks on cigarette butts." (Remember the website address: www.hlnovel.com
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