Chapter 1046

The moment Jiang Yuan stood up to pick up the remote pointer, Wang Chuanxing opened the PPT he had stayed up all night to make.

Wang Chuanxing's PPT was not as crude as the one Liu Jinghui had made himself, which was just a collection of circles. The fonts in Wang Chuanxing's PPT changed according to different needs, and even the brightness and color of some images and fonts were slightly different, focusing on being concise and clear at a glance.

Jiang Yuan pressed the remote pointer, and a photo of the scene was immediately displayed on the projection screen behind him.

"The crime scene created by the killer left a large amount of bloodstains, but because there were as many as three victims concentrated in a small space, much of the blood was submerged. This is also part of the reason why it was not very suitable to use bloodstain analysis in the early stages of the task force's investigation." Jiang Yuan first explained a couple of sentences for the previous task force. He was now a nationally renowned expert, and he tried to avoid things like giving someone a disciplinary action with a single sentence.

The officers of the criminal investigation detachment wrote furiously, quickly taking down Jiang Yuan's words.

After a brief pause, Jiang Yuan continued: "Let's look at the parts we can use now. First, everyone can see a narrow bloodstain here, indicating it was caused by a sharp weapon. Magnifying the blood droplets within the stain, you can see the tails of the droplets are very long; this is a typical sign of rapid movement, indicating that the killer either swung the weapon very quickly, or the weapon had a long handle."

As Jiang Yuan spoke, he pressed the remote pointer again, and several photos were displayed in sequence.

After the display, Jiang Yuan continued: "In addition to the photos just shown, some bloodstains were actually hidden in the pools of blood, and we cannot see the full picture. But based on the parts that were not covered, these leaking specks of blood, as well as some changes in the pools of blood themselves, we can find more traces of the weapon being swung."

Jiang Yuan did not elaborate, just projected more photos.

These would all be verified by the trace examiners of the Changyang City Criminal Investigation Detachment later. By the time it reached the inspection and trial stage, the prosecution and the court would also use their own trace examiners to read through it again. Finally, if a death sentence could be handed down, the High Court and the death penalty review stage would review it once more.

The reason why the police now increasingly emphasize evidence is also because of this. Using evidence to handle cases is relatively easy for everyone; other methods require more complex communication.

Yu Wenshu and the others looked blankly at the PPT in front of them. Even Yu Wenshu only had a photographic memory; he couldn't remember things like images, and understanding them was even more impossible.

At this moment, a GIF began to appear on the screen.

The little person in the picture was a stick figure, clumsy in movement and strange in posture, but in terms of the route and the swinging of the weapon, it was methodical.

"This is a GIF Wang Chuanxing stayed up all night to make, used to demonstrate the killer's sequence of killing after entering the room." Jiang Yuan gestured and said, "When the killer pried open the anti-theft window and entered the bedroom to start killing, the first movement was a horizontal slash at the second victim, Qin Jijian."

Jiang Yuan held the remote pointer, slightly raised his arm, slid it slowly through the air, and added, "He was likely aiming for Qin Jijian's neck, and his grasp of the distance was excellent. The weapon in his hand should have just perfectly sliced open Qin Jijian's neck, causing him to lose his fighting ability instantly. This belongs to a very professional technique; without years of practice, you couldn't do this."

"What weapon was used?" Yu Wenshu didn't understand bloodstain analysis, but he could ask for the answer directly.

"It was a weapon similar to a katana," Jiang Yuan said. "Long handle, sharp, swung quickly, and the total weight is not high."

"This is about the same as our previous judgment." Yu Wenshu nodded.

Jiang Yuan continued: "After the killer killed the second victim, Qin Jijian, he moved sideways to the bedside and struck the third victim, Gu Daxu, at least twice, but did not kill him immediately. Immediately after, the killer retreated, controlled the distance, and when Gu Daxu lunged over, he not only killed him with one slash but also didn't splash a drop of blood. Looking at the speed of the blade, it was basically unaffected, indicating that the situation was completely under the killer's control."

Jiang Yuan: "In the final stage, the killer avoided the blood on the floor and caught up with the frantically running female victim, Zhao Qian. Zhao Qian likely had a pleading gesture at the end, but was still stabbed to death without hesitation. Whether there was hesitation can be seen from the push and pull of the blade; the killer must have had a plan long ago, was convinced in his heart of how to do it, and executed it firmly."

"A professional hitman?" someone asked in a low voice from below.

"Even if a professional hitman doesn't carry a gun, why would he use a katana? Isn't he afraid of being caught?" Experienced officers scoffed at this idea. Nowadays, the most strictly regulated items are not firearms, but knives. Especially when police stations or patrol/special police go out, the first thing they consider when seeing someone is whether they are carrying a knife; very few people consider whether they are carrying a gun. And something like a katana, which is clearly a regulated item, would easily be watched by others wherever it goes. For a professional hitman, it would certainly be too conspicuous, and it's not necessarily better to use than a dagger.

As far as the 303 task force is concerned, the most difficult part for the killer should have been climbing the wall and prying the guardrail. Once inside the room and starting to kill, given the killer's physique that could bend the guardrail, the effect of a kitchen knife would be about the same.

Of course, using a sharp weapon like a katana would certainly produce better results. Not only did he cleanly kill the three people, but he also nipped the expected small resistance in the bud. His clothes and shoes were even clean. At least in the crime scene part, he hid himself as much as possible, and the effect was unusually good.

Jiang Yuan finally summarized: "The killer is definitely a master of the blade and has a certain amount of actual combat experience. Looking at his choice of killing, it can also be judged: he first killed the second victim, who was also the strongest and youngest of the three victims at the scene—a 28-year-old former porter who still maintained a large amount of physical labor in his daily work and was the most likely to pose a threat to the killer. Only then did he kill the 31-year-old male third victim, and the first victim, Zhao Qian."

"Is it the kind of competitive master, or a master specifically trained to kill?" Another officer raised a question he had hidden for a long time.

Jiang Yuan asked back: "What level is a professionally trained hitman?"

"Like the kind in Kill Bill?" someone let out a light laugh.

The atmosphere in the conference room became a little more relaxed, and Jiang Yuan also smiled slightly. It is common for a major case to take several months; it is impossible for everyone to keep a straight face and be serious all the time.

"I don't understand the technique of using a knife either. However, from the bloodstains at the scene, it can be seen that the killer's limb flexibility is very high, capable of making large-scale movements, and has sufficient strength. In addition, the height should be around 180 cm, with broad shoulders, sufficient waist strength, and a long arm span." Jiang Yuan judged this based on the blood scattered in the bedroom.

Compared to footprints, such judgments yield slightly less information, but the types are different.

Information like broad shoulders, long arms, and a height of 180 cm alone can greatly reduce the workload of the officers.

With Liu Jinghui's reasoning, plus Jiang Yuan's judgment, the number of people at the intersection of the two should not be large.

After saying a few more words, Yu Wenshu made the final decision: "Let's make a plan according to this direction, and screen the people first."

"That..." Liu Wenkai couldn't help but stand up and say, "Should we start with a secret investigation? After all, this case involves the privacy of many people. If things go wrong, some people will have to get divorced."

"Some things are done, so if you should get divorced, then get divorced." Someone shouted from afar.

"I know some friends who told me that there are some things they don't want to know." Liu Wenkai said meaningfully: "There are some things, as long as they don't know it themselves, as long as outsiders don't know, as long as it doesn't become a city-wide scandal, they can live with it themselves."

"Then let's start with a secret investigation." Yu Wenshu was also unwilling to break taboos, only saying: "The killer this time is very fierce, has weapons, and is good at fighting. Each group must ensure at least 4 people. When questioning, try to concentrate as much as possible. Everyone carry a stun gun; if there aren't enough, go get some more."