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Life-ending Steamed Bun ¡¤ 10

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    You can search for "Nine Drops of Water¡¤Corpse Investigation Department Series (7 volumes in total)" on Baidu to find the latest chapters!

    Chunxiao Mingju, Building 35, Room 2201.  This is the place where Tang Wanting has rented for a year and a half. It is a 40-square-meter single apartment. The furnishings are clearly visible at a glance. From the slippers when entering the door to the furnishings in the bathroom, there is basically no trace of another person living there. After searching around  After getting no results, Fat Lei opened Tang Wanting's desktop computer under her witness.

    In Fat Lei¡¯s words, the computer is ¡°cleaner than a child¡¯s butt.¡± Except for an Internet icon, everything else is a system shortcut.

    ¡°Except for surfing the Internet to read news, I hardly use a computer.¡± Tang Wanting explained at the side.

    Fat Lei originally thought he could check QQ chat records or something, but after looking through the C drive for a long time, he didn¡¯t have any clue.

    In order, he opened the d drive and e drive.

    But when Fat Lei double-clicked to open the "Photos" folder, his expression suddenly became serious.

    "Tang Wanting, who took these photos of you?"

    ¡°Colleagues from the work unit!¡±

    "Male or female?"

    "Of course it's a woman."

    "Female?" Fat Lei's small eyes were squeezed together, with an expression that seemed to say: "Young man, do you dare to lie to you, Fatty?"

    "Yes, it's a woman. It was taken during an outing organized by our company."

    "What camera was used to take the photo?"

    "It's just an ordinary card machine, the one on the table."

    "Ye Qian, use a USB flash drive to copy all these photos away. Also give her a seizure order for the camera and take it away with them."

    "Officer, why are you copying my private photos?" Tang Wanting was a little unhappy.

    Fat Lei raised the search warrant in his hand: "Let me tell you, we have formal procedures, and we are doing things in accordance with the law. Whether Wu Liang's death has anything to do with you, I think there will be an answer soon!"

    Half an hour later, a group of us returned to the department.

    I asked with some confusion: "Brother Lei, what did you find? Aren't these all single photos of Tang Wanting?"

    "Of course you, with your naked eyes, can't see the fishy things inside."

    "Definitely, you are awesome, I want to see what flowers you can come up with."

    "What? You don't believe in your brother and my strength?" Fat Lei said, dragging a photo of Tang Wanting standing on the table, and then pointed the position of the ground on the photo with a pen, "Did you see it, what is this?  "

    "Let me go, are you stupid? Isn't this a shadow?"

    "Okay, very good, I will use this shadow to calculate the height of the photographer."

    "Pfft!" I squirted water onto the ground, "What? This half of the shadow is not as long as the little finger. You want to calculate the height of the photographer?"

    "A golden mountain! Do you dare to take a gamble?"

    ¡°Don¡¯t give me one, count it out, I¡¯ll give you two!¡±

    "This is what you said!"

    "A gentleman's words are like a whip for a horse."

    "Okay, but you have to run an errand for me." Pang Lei pointed to the building in the photo and said, "I took my son to this place. It is the city tower of Shouzhou County. You go and help me measure the city bricks.  average length."

    "No problem, I don't have to go for such a trivial matter. One of my junior brothers is at the Chenglou Police Station. I just give him a call and ask him to run some errands."

    "Okay, give me the values, and I'll give you the answer in an hour." Fat Lei listed the formulas on the white paper seriously.  I saw him measuring the photos with a vernier caliper for a while, and flipping back and forth on his mobile phone for a while, very busy.

    After smoking three cigarettes, Pang Lei drew a circle on the white paper with a pen. In the circle, he wrote a numerical value with a water pen, "about 1.91 meters."

    "The height of the photographer is 1.91 meters, which is similar to the height of the suspect you inferred. Tang Wanting lied."

    "Is it true or false? How do I know if it's a value you just reported? How did you calculate it?"

    Fat Lei seemed to have expected this move from me. He shook his hair confidently, pointed at the photo and said, "There is a specific shooting date and time in the lower right corner of the photo. I also proofread the camera in Beijing."  There is no deviation in time, so we can see from this that the photo was taken at 10:01 am on November 1st.

    "Judging from the imaging of the photo, the photographer followed the light and took the photo from east to west, and Tang Wanting happened to be standing in a straight line with him.

    ¡°From the half shadow exposed in the lower left corner of the photo, it can be seen that the photographer is in an upright position.

      ¡°These are the prerequisites, let¡¯s plug in the numbers next.

    "First, focal length. Focal length is the distance from the focus to the center point of the mask. In our case, it is the straight-line distance between the photographer holding the camera and Tang Wanting. When I observed the camera, I found that the card camera was in autofocus  state. In this state, the focal length is a fixed value. We know that this value is a.

    "Second, the length of the wall tiles. From the photo, we can clearly see that the distance from the tip of the shadow on the ground to Tang Wanting is 6 full wall tiles. We know that this value is b.

    "Third, the solar altitude angle. The so-called solar altitude angle refers to the angle between the incident direction of sunlight and the ground plane. We already know the specific shooting time and location. We can find the shooting time through professional weather software.  The specific degree of the sun's altitude angle, we know that this degree is c.

    "Now that we know the three values ????of abc, let's understand the principle of shadow formation. It is a darker area formed because the object blocks the propagation of light and cannot pass through opaque objects. The shadow is actually an optical phenomenon. "

    After Fat Lei finished speaking, he drew a right triangle on the white paper. He then drew a vertical line not far to the right of the triangle.

    He marked the height of the right triangle with the words "photographer's height", and the base of the triangle was marked with the words "photographer's shadow length".

    That lonely vertical line had three words "Tang Wanting" written next to it. The blank distance between the vertical line and the bottom of the triangle was marked "wall brick". The total distance from the vertical height of the triangle to the vertical line was named "  focal length".

    The vertex angle of the triangle is marked as the "solar altitude angle".

    After drawing the picture, Fat Lei continued to explain: "We subtract the distance b from the blank wall tile from the focal length a, and what we get is the length of the base of the triangle, which is the length of the photographer's shadow. In a right-angled triangle, one base is known, and  Knowing the degree of an angle, using the tangent function in the triangle, the formula is tanc=(a-b)/the height of the photographer. Using this formula, plugging in the numerical values, the height of the photographer is calculated to be approximately 1.91 meters."

    "Brother Lei, I really can't accept it. I'm willing to admit defeat. I'll put two golden mountains on your table later."

    Fat Lei picked up the water glass and took a sip: "I have been to the ancient city building in Shouzhou County. In order to prevent people from stealing the ancient city wall tiles privately, the county government has almost 360-degree surveillance with no blind spots, and they are all high-definition far-infrared cameras.  , the shooting time was less than half a month ago, the surveillance at that time must have reservations, whether Tang Wanting lied, you can tell by calling the surveillance."

    Based on Fat Lei¡¯s idea, we found in the video footage of Tang Wanting being intimate with a man, and this man was the man in a suit and leather shoes at the gate of the Sishui River.

    With the suspected target in mind, Fat Lei began to investigate all the video surveillance near the Jinhuayuan Community on the night of the crime. Finally, the man fell into our sight. He had appeared near the community before the crime, and according to the extension of the video, Fat Lei  Lei also discovered that he had been to a large pharmacy within 3 hours before committing the crime.

    Fat Lei and I then retrieved and analyzed the video footage from the pharmacy. What we didn¡¯t expect was that the man actually used a medical insurance card when checking out.

    Combining the checkout time at the cashier, we quickly found out the man¡¯s identity: Mu Yunxuan, male, 34 years old, employee of a state-owned enterprise, divorced.  The man was successfully captured 24 hours later.  (Remember the website address: www.hlnovel.com
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