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Parasitic evil thoughts · 7

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    One day later, the fingerprints and DNA information of the deceased were returned.  After comparison, no relevant information about the deceased was registered in the national data system.  The whereabouts of the deceased's head are still unknown, and there are no conditions for skull reconstruction.  In order to mobilize all available forces, Lao Xian compiled the general information of the deceased into a document and published a post on the city bureau website titled "Notice on Assisting in the Investigation of the Source of the Headless Corpse".

    As the saying goes, "When three people work together, there must be one teacher." Although our department's professional knowledge reserve is a little better than that of ordinary police officers, our practical experience is far less rich than that of grassroots police officers.  To put it further, when investigating the case of corpses buried in the subsidence area, if the policeman named Shi Guoji hadn't cleverly used an aerial camera, the large area of ????the scene would definitely have caused people in our department to run away and break their legs; to put it closer, on the water  Lao Zhao, the "corpse hunter" at the police station, sometimes even surpassed Brother Ming in his ability to judge floating corpses.  So we must not underestimate our police brothers, many of them have hidden skills.  Usually when we encounter difficult cases, we will issue a joint investigation notice and use the wisdom of the overall police.

    The investigation of the source of the corpse came to an end, and news came from Ye Qian that because the Sishui River has always been a major shipping route, there were many stone bridges built in the early years. It will take some time to find the dumping point within 50 kilometers.

    Based on this, Brother Ming took us directly to start the third task-"Motorcycle Detection Experiment".

    The purpose of the experiment is threefold:

    First, determine the approximate model of the motorcycle.

    Second, determine how fast the motorcycle must travel before the exhaust pipe temperature will rise rapidly.

    Third, determine how far the motorcycle traveled before similar hot stamping marks were formed on the surface of the body.

    Ye Qian knows a lot of motorcycle masters.  After communicating, they helped find all the motorcycle exhaust pipes available on the market, including original pipes, back pressure pipes, semi-back pressure pipes, straight pipes, semi-straight pipes, S drums, internal back pressure,  g-type, straight-line, y-type, street drum, m drum, hks drum.  If I hadn't seen it with my own eyes, I wouldn't have known there were so many types of motorcycle exhaust pipes.

    Fortunately, the differences between the various types are obvious. By comparing the shapes of the marks, we finally locked on two types of exhaust pipes: "original pipe" and "straight exhaust pipe".  According to insiders, these two pipes are popular pipes, which can increase the horsepower at high speeds and are suitable for long-term driving.  Commonly used on motorcycles with a displacement of 125 cubic centimeters [1]. The 125-type motorcycle consumes 2.5 liters of fuel per 100 kilometers with a manual transmission and 3 liters with an automatic transmission. It is an economical motorcycle with a high distribution volume.

    Once the car model is determined, the remaining work becomes much simpler.  After many test drives, we concluded that when the vehicle speed reaches more than 50 kilometers per hour, the temperature of the exhaust pipe will rise rapidly.  To form a mark on the deceased, the motorcycle must travel at a constant speed for 36 kilometers. Exceeding this distance will cause the skin to char.

    “In this way, the tool used by the suspect to dump the body was an unknown brand 125 motorcycle. The longest distance from the place of murder to the place where the body was dumped was 36 kilometers.  Taking the dumping point as the center of the circle and drawing a circle with a radius of 36 kilometers, then the first murder scene is within this defined area.

    With the "radius", finding the "center of the circle" has become the next key task.  At first we thought that as long as there was a stone bridge that met the conditions, we could just find frogmen to dive into the bottom of the river to see if there were any heavy objects, and it wouldn’t be too difficult.  But it turns out that our thinking was too simple.  Frogmen face three major difficulties when diving: first, the river water is turbid and visibility is extremely low; second, the undercurrent is fast and it is almost difficult to walk on the bottom of the river; third, the mud at the bottom of the river is too thick, and heavy objects sink into the mud after falling, almost  Not a trace could be seen.  (Remember the website address: www.hlnovel.com
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