Chapter 47 Section 6

fluorescent! A few clear blue spots appeared on the ground. Although the shape was not so regular after being wiped, it still shone brightly in the dark, like a group of tadpoles that had been trampled to death. Liu's mind instantly calmed down. Just like a hunter finds a fox track in the snow, for a forensic investigator, there is nothing more exciting and focused than finding new physical evidence at a crime scene.She continued to spray the nearby ground and walls with the luminol watering can. When the crime scene has been cleaned and bloodstains are invisible to the naked eye, specific reagents can make hidden bloodstains visible. The most commonly used by the police are luminol and dihydrofluorescein, which react with iron in hemoglobin. It can show blood that has been diluted 12,000 times. The only difference is that luminol must be used in dark conditions, while dihydrofluorescein can only emit light under ultraviolet light.

The next step is to detect whether the blood on the ground is human blood.Forged bloodstains are the most common in injury cases. It often happens that A is slightly injured by B. In order for the police to punish B severely, A splashes chicken blood (chicken blood is really the most used) on the crime scene. The scene, and then go to the hospital to bandage the wound bigger—of course, this kind of thing can be solved with a presumptive blood test, such as the monoclonal antibody reagent Liu is using now, which can easily confirm that the blood on the floor is human blood. It's easy to handle with human blood.Liu Xin thought.Specifically whose blood belongs to, use the abo blood group system to check whether there are type a or type b antigens on the surface of red blood cells, or take the sample back to the laboratory for DNA testing, and it can also be quickly identified.But Liu has a better way, which is what needs to be done more right now-to analyze the shape of the blood.

She pointed the turned on flashlight to the wall, and the whole corridor was immediately shrouded in dim light. Her shadow was cast on the walls and ceiling, like a black humanoid paper-cut staring at her indifferently. "Specific offensive behavior causes the blood in the human body to form a specific shape at the crime scene"-when a drop of blood hits the surface of the object, due to the difference in force, it will form marks of different shapes.For example, a circular bloodstain indicates that the blood hit the surface of the object in a vertical route (for example, blood dripping from a fingertip on the floor), and a jagged bloodstain is the result of blood spurting out at high speed or falling for a long distance, and the sprayed bloodstain often comes from Cut arteries.By analyzing the shape of the blood, not only can the murder weapon be deduced, but also the origin of the blood source can be accurately located.

Liu took out a multifunctional ruler from the on-site investigation box and began to measure the diameters of the few blood droplets on the ground. Most of them were only 2 to 4 mm, indicating that the force that caused the bloodstain exceeded 7.62 m/s, which belongs to Squeeze at medium speed to splatter blood.This kind of blood is usually caused by hitting with blunt objects such as iron rods and throwing sticks. But never an ashtray!The shape of the murder weapon is closely related to the shape of the bloodstain. It is like cutting a tomato with a knife and smashing a tomato with a rolling pin. The splashed juice is completely different.

Spread the five fingers of the right hand close to the ground, press the left and right edges of a blood drop with the thumb and little finger respectively, so that the middle finger has a main axis, draw a straight line using the projection regression method compared to the ruler, and then tiptoe lightly After one turn, the body silently slid to the second blood drop, obtained a new main axis by the same method, and drew a straight line... Finally, all the straight lines intersected within a small range on the ground—— It is a two-dimensional intersection point. The white wrist with the knife marks was waved lightly in the air, and the five fingers flapped like butterfly wings, and the multi-functional ruler clattered into a protractor.

After measuring the corresponding angle of action, slowly raise your head, and in the semi-dark void, let the two-dimensional intersection point move up with your line of sight, reaching a certain height above the ground, stop, right here! Ballerina at the crime scene. What darkness, what wind, what ghost, what fear, all left behind!When the three-dimensional source point was determined, when the real death location was locked, although her heart was still confused, there was a dazzling brightness at the end of the confusion. One most important piece of evidence is still missing. However, it shouldn't be hard to find.Most remote controls use two methods to control long distances: one is to use near-infrared rays with a wavelength of 0.76 to 1.5 μm to transmit control signals. This kind of remote control cannot penetrate walls, so it will only be another One: radio remote control in uhf frequency band.However, if the radio encounters a reinforced concrete wall, the remote control effect will be greatly reduced due to the absorption of the electric wave by the conductor.The murderer has devoted himself to the arrangement and will never ignore this problem. Therefore, if he wants to remotely control the killing tool in the ktv room, the only way to do it is through——

Liu Min glanced at the wooden door of the private room. Then she picked up the flashlight, cast the cylindrical light on the ceiling of the aisle, and moved slowly until she approached the foyer, where she finally saw a grid-shaped vent. Now I finally know why someone moved that aluminum alloy ladder. After checking the vents in the ktv private room just now, she left the ladder in place, so although she was completely unwilling in her heart, she walked into the private room, and just carried the ladder on her shoulders to go out when she heard a voice coming from outside the door. A clear sound——

Bang! The cold hairs all over his body stood on end! Are there other people in this lakeside building? She carefully opened the wooden door, and illuminated the aisle with a flashlight: it was empty, as silent as the cuffs of a shroud. Misheard?No, it was obviously the sound of knocking down some wine bottle, washbasin or something like that.Or was it a cat's fault?It is also unlikely, after staying in the lakeside building for such a long time, I may not be sure about other feelings, but the word "lifeless" is certain. Standing in a bright place while her opponent was hiding in the dark, she was undoubtedly a living target. She immediately turned off the flashlight, leaned against the wall, held her breath, and waited quietly. confronted.She widened her eyes, and analyzed every darkness like a scanner: which part of the darkness became thicker, which part changed in shape, and which trace of movement was different, so that she could preemptively strike at the second before being attacked...

After a long time, there is still no movement. If the darkness is a lake, there is not even a ripple. Maybe it is really a cat... only myself. only myself. only myself. Originally murmured out of fear, but at this moment it became the only belief to overcome fear. She let out a long breath, turned on the flashlight again, carried the ladder to the end of the aisle, placed the ladder under the vent, and climbed up step by step. The palm is supporting the partition of the vent, now, as long as you lift your arm, everything will be revealed. How long has it been since you escaped from the lakeside building to get here?

She gritted her teeth, pushed open the partition, and stuck her head in. The flashlight shines directly on a metal object.This object is very similar to the first phonograph invented by Edison. There is a circle of thick wires randomly coiled around the lower edge, and the plug is still plugged into a power supply embedded in the wall.Liu pushed it lightly, but it was very heavy, so she used a little strength to tilt the "gramophone" a little bit, exposing the bell mouth facing the direction of the private room. She closed her eyes and pressed her ear to the mouth of the horn. sizzle...

It might be a prelude. With the clarity of the melody and the rise of the pitch, the phonograph will gradually release a grand movement, which is refreshing or touching, but she waited for a long time before realizing that it was just the sound of air flowing in the speaker. She was still listening, she could hear. There was no sound at all, but the sound shook her heart like a hammer: so many suppressed sobs, so many mournful sobs, so many dying groans, so many helpless sighs, all poured into her heart eardrum. The past and reality are as heavy as lead, the withered wasteland, the raging cold wind, a long national road that can't be seen from the beginning to the end, and the dark crowd flocks to lecture halls full of lies. Selling one's soul at a price, is it true that Lu Xun said that "all stupid and weak citizens, no matter how healthy and strong they are, can only be meaningless publicity materials and spectators"? So I was anesthetized and hypnotized willingly: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, you are me, I am you, you must follow my instructions unconditionally, let me use , Driving, playing with, even killing... Killing, killing, sound killing is nothing, what is really terrible is the silent group drowning.That's right, my memory is not wrong, the lake water once submerged the entire lakeside building, almost drowning me, no matter how bizarre and unbelievable it is... A building, a cemetery, a lake bottom, a secret room, Luo Luo thinks it is a secret room, Chu Tianying thinks it is a secret room, even I think it is a secret room, the murderer wants us all Everyone thinks it is a secret room, a secret room where the doors and windows are locked and airtight, no one can escape, so there is no need to work hard to crack the secret room!He succeeded, and the whole nation is a huge secret room—could he not succeed? ! Thinking, indistinct, I am broken, everything! Her hand trembled, and the flashlight slipped from her palm. Like a synchronized diver, she rolled in mid-air and hit the ground. She lowered her head and saw the luminous object in the plastic shell, and a second before it fell to pieces, it saw a terrifying scene—— Next to the aluminum alloy ladder, there are a pair of feet. Liu Simiao exclaimed, and slipped down the ladder, but her feet didn't touch the ground, because a pair of hands caught her neck in mid-air! In the darkness, she was kicking and beating desperately, the clanging sound of the ladder being kicked to the ground, and the creaking sound of her own neck bone being about to be strangled!The strength is too great, could it be that those six ghosts have entangled me together?I can't breathe, I'm dying!I know the whole truth, but I will be buried forever with it... In that horrible and bloody night, I escaped from the lakeside building, crossed the prairie where the wind was howling, and stood on the national road covered in blood. I thought I had escaped. Could it be that I could not escape and become the seventh ghost? fate? ! Fragrant tea - help me! She thought of the summer in junior high school, the three days and three nights of being imprisoned, the dark cellar, and the miraculous appearance of fragrant tea when she was desperate... She thought that Xiang Tea would reach out again and pull her from the darkness to the light...