The moment Jiang Yuan stood up and picked up the remote control pen, Wang Chuanxing opened the PPT he had stayed up all night to prepare.
Wang Chuanxing's PPT is not as simple as the PPT made by Liu Jinghui himself. It is all made up of circles. The fonts in Wang Chuanxing's PPT change according to different needs, and even the brightness and color of some pictures and fonts are different.
They are slightly different, focusing on one that is detailed and clear at a glance.
Jiang Yuan pressed the remote control pen, and a photo of the scene was immediately displayed on the projection cloth behind him.
"The murderer left a lot of bloodstains at the crime scene, but because there were as many as three people dead and they were concentrated in a small space, a lot of the bloodstains were wiped out. This is also in the preliminary investigation of the task force and is not suitable for use.
Part of the reason for the blood stain analysis method." Jiang Yuan first explained a few sentences for the previous task force. He is now a nationally renowned expert, and we should try to avoid giving people a punishment in one sentence.
The police officers from the criminal police detachment wrote furiously and quickly wrote down Jiang Yuan's words.
After a pause, Jiang Yuan continued: "Let's take a look at the usable parts now. First of all, you can see that there is a narrow blood stain here, indicating that it was caused by a sharp weapon. If you zoom in on the blood droplets in the blood stain, you can see
The tail to the blood drop is very long, which is a typical sign of fast movement, indicating that the murderer is either swinging the weapon very fast, or the weapon has a longer handle."
While Jiang Yuan was talking, he pressed the remote control pen again and saw several photos displayed one after another.
After the display, Jiang Yuan continued: "Except for the photos just released, some blood stains are actually hidden in the pool of blood. We can't get a glimpse of the whole picture, but based on the parts that are not covered, these little bits of blood stains leak out.
, and there are some changes in the pool of blood itself, and we can find more traces of weapons being swung."
Jiang Yuan did not elaborate, but only posted more photos.
These will later be verified by the trace examiners of the Changyang City Criminal Police Detachment. When the prosecution and trial stages are reached, the prosecutor and the court will also use their own trace examiners to read it again. In the end, if the death penalty can be sentenced, the High Court and the death penalty
It will be reviewed again during the review phase.
It is for this reason that the police now place more and more emphasis on evidence. It is easier for everyone to use evidence to handle cases, while other methods require more complex communication.
Yu Wenshu and others looked at the PPT in front of them blankly. Even Yu Wenshu only had a photographic memory. He couldn't remember pictures, let alone understand them.
At this time, an animated picture began to appear on the screen.
The little man in the picture is a stick figure, with clumsy movements and weird postures, but he is very precise in his route and wielding weapons.
"This is an animation that Wang Chuanxing made late at night to demonstrate the murder sequence after the murderer entered the house." Jiang Yuan gestured and said: "When the murderer opened the security window, entered the bedroom and started killing people, his first movement was horizontal.
Chop up deceased No. 2 Qin Jijian."
Jiang Yuan held the remote control pen, raised his arm slightly, slid it slowly in mid-air, and then said: "He should be aiming at Qin Jijian's neck, and he has a good grasp of the distance. The weapon in his hand should have just opened it."
Qin Jijian's neck instantly lost its combat effectiveness. This is a very professional technique. Without several years of practice, it would not have been possible."
"What weapon was used?" Yu Wenshu didn't understand bloodstain analysis, but he could ask the answer directly.
"It's a weapon similar to a samurai sword." Jiang Yuandao: "It has a long handle, is sharp, can be swung quickly, and the total weight is not high."
"This is similar to our previous judgment." Yu Wenshu nodded.
Jiang Yuan continued: "After the murderer killed Qin Jijian, the second victim, he moved sideways to the bedside and hit the third victim, Gu Daxu, at least twice, but did not kill him immediately. Then the murderer retreated, controlled the distance, and when Gu Daxu rushed towards him, he did not kill him immediately.
At that time, not only was he killed with one blow, but no blood was spilled, and the speed of the knife was basically not affected, which shows that the situation was completely under the control of the murderer."
Jiang Yuan: "In the final stage, the murderer avoided the blood on the ground and caught up with the female deceased Zhao Qian who was running wildly. Zhao Qian should have made a move to beg for mercy in the end, but she was still stabbed to death without hesitation. Is it right?
The hesitation can be seen from the push and pull of the knife. The murderer must have had a plan in advance, was convinced of how to do it, and carried it out firmly."
"Professional killer?" Someone asked in a low voice below.
"Even if a professional killer doesn't hold a gun, what can he do with a samurai sword? Aren't he afraid of being caught?" Experienced police officers sneered at this idea. The most serious thing to control now is not firearms, but knives. Especially in police stations or police stations.
When special police patrols go out, they first consider whether people are holding knives. Few people think about holding guns. However, samurai swords, which are controlled items at first glance, are easily stared at wherever they go. For professional killers,
It's definitely too conspicuous, and it's not necessarily any easier to use than a dagger.
As far as the 303 project is concerned, the most difficult thing for the murderer is climbing the wall and breaking the guardrail. Once he enters the room and starts killing, the murderer can bend the guardrail, and the effect of a kitchen knife is almost the same.
Of course, if he used sharp weapons such as samurai swords, the effect would definitely be better. Not only did he kill three people cleanly, but he also nipped the expected resistance in the bud. His clothes and shoes were also
It was even clean. At least at the crime scene, he tried his best to hide himself, and the effect was unusually good.
Jiang Yuan finally concluded: "The murderer is definitely a master with knives and has some practical experience. You can also tell by looking at his choice of killing. The No. 2 victim he killed first was also the strongest and youngest of the three victims at the scene.
The 28-year-old was born as a porter, and his daily work still involves a lot of physical labor, so he is the most likely to pose a threat to the murderer. Followed by the 31-year-old male deceased No. 3, and the deceased No. 1, the female Zhao Qian."
"Are you a competitive master, or a professionally trained murderer?" Another police officer asked a question that he had hidden for a long time.
Jiang Yuan asked: "What is the level of professionally trained killers?"
"The kind from Kill Bill?" Someone smiled softly.
The atmosphere in the conference room became a little more relaxed, and Jiang Yuan also smiled. It is common to work on a serious case for several months, and it is impossible to keep a straight face and look serious.
"I don't understand the technique of using a knife. However, from the blood stains at the scene, we can see that the murderer's limbs are very flexible, he can make a wide range of movements, and he has sufficient strength. In addition, he should be about 180 centimeters tall.
Broad shoulders, strong waist and long arms." Jiang Yuan judged based on the blood stains scattered in the bedroom.
Compared with footprints, this kind of judgment can obtain slightly less information, but the type is different.
Mere information such as shoulder width, hand length, and height 180 centimeters can greatly reduce the workload of police officers.
With Liu Jinghui's reasoning and Jiang Yuan's judgment, there shouldn't be many people who meet each other.
After a few more words, Yu Wenshu decided directly and said: "Let's make plans in this direction and screen the people first before making any decisions."
"Well..." Liu Wenkai couldn't help but stand up and said, "Should we start with a secret investigation? After all, this case involves the privacy of many people. Maybe some people will get divorced."
"Some things have been done, and it's time to get divorced." Someone shouted from a distance.
"I know some friends, and they tell me that there are some things that they don't want to know." Liu Wenkai said meaningfully: "There are some things that as long as they don't know it themselves, as long as outsiders don't know it, and as long as they don't cause trouble in the city, they themselves
It can be passed."
"Then let's investigate secretly first." Yu Wenshu was not willing to violate taboos, and only said: "This time the murderer is very fierce, has weapons, and is good at fighting. Each group must have more than 4 people, and there must be more than 4 people in each group when questioning.
Gather as many people as possible and bring stun guns. If there are not enough, go get some."
