Chapter 1189: Because Already

Jiang Yuan's "of course" brought a silence.

The auditorium of two or three hundred people fell into silence tacitly, which itself is a shout.

Everyone sitting here has started working. Those who have been working for a long time, like Captain Pang Jidong, should retire in a few years. Those who have been working for a short time also have two or three years of experience. Younger ones will not be sent to participate in training.

In fact, you only need a little criminal police experience, and you have participated in the investigation of a few cases, to know how outrageous what Jiang Yuan said is.

No matter which route you choose, you can solve the case. It sounds like all roads lead to Rome, but only when you really do things do you know how difficult it is to find a road, how tired it is to build a road, and how many mountain carvings you have to encounter to walk through a road.

Those special case groups for major cases and important cases operate several investigation routes at the same time because there is no clear direction. Furthermore, it is because these investigation routes, after being handled, are likely to become one.

The rest are written on the middle of the road: this road is impassable.

As for small cases, in fact, small cases are not necessarily easier to solve than major cases.

Small cases that are relatively easy for the police to solve are mostly derived from the perpetrator himself. Either the perpetrator himself is not rigorous, or the perpetrator himself is a "person on the road", who was pointed out accidentally, or it is because the perpetrator commits crimes continuously, causing serial cases, providing more information to the investigation side.

Finally, many small cases are also because the perpetrator's resistance is weak. Although it is said that in China, it is not like in the beautiful America, where plea bargaining can be done, but whether it is in the interrogation room or after being sent to the prosecutor, people on the other side of the iron fence will use various means to apply pressure.

The suspect who committed a major crime often has strong resistance, knowing that he might die if he confesses. And those who do small cases, especially in the face of the choice of confession can be probation, waiting for the sentence to be actual, it is not easy to persist.

Like the "Sunshine Supermarket" case, the small boss who committed the crime basically has everything, but even so, without a certain amount of investment, this kind of case is not necessarily solved.

As for the rape case, this is actually a relatively large case, and the difficulty is inevitably higher than the "Sunshine Supermarket" theft case.

Relatively speaking, the difficulty of "all roads lead to Rome" is naturally higher.

However, in the auditorium of two or three hundred people, does anyone not believe Jiang Yuan? Does anyone dare not believe it? Is anyone willing not to believe it?

But to say believe, those with a little brain, the words like "killing by praise" are floating in their minds.

Silence is the best answer.

Jiang Yuan is unaware.

He is a cheater. He lacks a correct understanding of the difficulty of certain cases. On the other hand, he is too lazy to engage in those things that are grounded. For Jiang Yuan, those are unnecessary things. His father has more houses for rent than cattle for grazing. He spends his father's pocket money every month. What capital does he have to engage in that grounded set.

So, Jiang Yuan turned a blind eye to the silence below.

If you have an opinion, you can raise it. If you don't raise an opinion, Jiang Yuan will not look at their faces.

Jiang Yuan sorted out his thoughts slightly and said: "I will decompose this case one by one according to the schemes on these notes handed out by everyone. Well, police officers with ideas later can continue to hand in notes."

Jiang Yuan said as he recorded in his notebook, and said: "This route of forensic botany is very laborious to do, but it is actually simple to say. Both sides have physical contact, so there is a possibility of passing and exchanging sporopollen. Note one point here, some sporopollen is relatively difficult to pass through simple contact, while others are relatively easy. This can be used as a basic idea to distinguish between native sporopollen and transmitted sporopollen... Jidong, you are responsible for this route."

"Yes." Captain Pang Jidong stood up and saluted.

Although he is a detachment leader from other places, he has always been respectful to his master Jiang Yuan, just like when he first entered the unit more than 20 years ago and worshipped his master.

Jiang Yuan nodded relatively relieved.

Captain Pang Jidong's forensic botany skill tree is a bit crooked. He himself actually has no botanical foundation. He belongs to the type who doesn't know how many kinds of paulownia trees there are, but his understanding of forensic botany has been raised. Technical talents who know how to use forensic botany know which cases can find people, which cases can use forensic botany to solve, and know which scheme is more efficient, shorter time, and know the accuracy.

"The idea of serial cases... Wei Shiyan, what do you think." Jiang Yuan continued to call his apprentice's name, making the people below envy.

Wei Shiyan is back online.

This time, Wei Shiyan was clean beside him, and the background wall was specially cleaned up.

And on the big screen of the auditorium, Wei Shiyan's one-square-meter face was clearly twisted.

Wei Shiyan waited for a long time before saying: "If we solve the case through surveillance video, the difficulties we encounter are mainly three. The first is that it is not easy to determine which of these people in this period is the suspect; the second, even if there is a suspicious suspect object, because of the light of the camera at the entrance of the bar, we can't see the face clearly; the third, even if we can see the face relatively clearly, face recognition can't find anyone."

Jiang Yuan called him, it must be to solve the case through surveillance. Wei Shiyan didn't have much criminal investigation experience, but just because of this point, he was also smooth.

Speaking of this, Wei Shiyan was relatively relaxed, and continued: "If it is a serial case, it can solve these three difficulties well. First, the degree of suspicion of repeated appearances increases; second, if you can't see the face clearly, you can also determine the same through other physical characteristics; third, there are data from multiple cameras, which is better for face recognition."

"Okay, leave it to you. Well, Shen Yaowei, you cooperate with Wei Shiyan." Jiang Yuan pointed out the local second generation to Wei Shiyan, and the two should cooperate better.

Wei Shiyan was inexplicably panicked: "Do I investigate independently?"

"If you have any questions, find me. In addition, make a version of image enhancement first." Jiang Yuan signaled Wang Chuanxing to close the communication, turned his head and said: "Team Leader Liu, this scheme may expand the case. You send a team to follow up. Don't worry about Wei Shiyan and them, you just go to serial cases and see."

"No problem." Liu Wenkai responded immediately: "This person seems to be very skilled in rape, and it shouldn't be the first time, but there is only one case reported locally, so we have to meet with colleagues from other places."

Jiang Yuan curled his lips: "You look at it."

Liu Wenkai also laughed out loud, feeling a bit weird, but it was indeed a solution.

Shen Yaowei and Captain Pang Jidong and others also left. The remaining criminal police stared wide-eyed, feeling like they were going to watch a magician solve a mystery.

Seeing this, Jiang Yuan took out his pen, wrote and drew a few times in his notebook, listed a simple outline, and said: "In fact, everyone has experience in handling cases through fibers. As for this case, the value of the evidence at the crime scene is relatively low. The most valuable and important evidence is actually the victim's clothing, especially the front of the clothing."

Jiang Yuan let Wang Chuanxing put out the evidence pictures again, found the P31 picture he wanted, and said: "This is the coat worn by the victim. After I asked my colleagues in the laboratory to check it carefully, I found that the lining of the coat has multiple fiber tissues. Part of the fiber tissue source is the victim's own clothing, but there are also some sources unknown. Here, it is focused on observing that three fibers have tear marks on the edges..."

Jiang Yuan drew a circle on the enlarged picture on the spot and said: "Here, here, here, all have similar fibers. After inspection and confirmation, the fiber is natural cashmere, and it has been dyed wine red. In this way, combined with the surveillance video at the time, we can actually determine that the suspect is this..."

Wang Chuanxing quickly put out the picture P219, a middle-aged man wearing a wine-red sweater.

"Can you do face recognition?" Someone below asked in a low voice.

"Can't do it, the face is not clear, and the angle is not good." Jiang Yuan said, and continued: "But we can find the vehicle he took when he left..."

This time, Wang Chuanxing had no pictures. Jiang Yuan operated it with a "pa pa" and intercepted a picture of the vehicle.

"Left by taxi?" Someone saw the operation information on it. This time, without Jiang Yuan saying it again, he immediately said: "If you find the information of the person who took the taxi through the vehicle, you can basically determine the suspect's identity!"

"That's it. Let's stop here today." Jiang Yuan started to pack up silently.

A group of criminal police in the auditorium watched Jiang Yuan leave.

The moment the door of the auditorium closed, there was a "boom" sound, noisy and lively:

"Damn!"

"Damn!"

"Damn!"

(End of chapter) ===== CHAPTER 1190 =====

Jiang Yuan drew circles on the enlarged image at the scene and said, "Here, here, and here—all have similar fibers. Laboratory testing has confirmed that the fiber is natural cashmere, and it has been dyed wine-red. Thus, combined with the surveillance footage from that time, we can actually confirm that the suspect is this person..."

Wang Chuanxing quickly displayed image P219: a middle-aged man wearing a wine-red sweater.

"Can we perform facial recognition?" someone whispered from below.

"We can't; the face wasn't captured clearly, and the angle is poor," Jiang Yuan said, then added, "But we can find the vehicle he used when he left..."

This time, Wang Chuanxing had no image, so Jiang Yuan tapped away at the controls for a moment and pulled up a screenshot of the vehicle.

"He left by taxi?" Someone saw the ride-hailing information on it. This time, without waiting for Jiang Yuan to speak, they immediately said, "If we find the passenger's information through the vehicle, we can basically confirm the suspect's identity!"

"That is the case. Let's stop here for today." Jiang Yuan silently began to pack up his things.

The crowd of criminal police in the auditorium watched Jiang Yuan leave.

The moment the auditorium doors closed, a "Boom—" of noise erupted, becoming boisterous and lively:

"Holy crap!"

"Damn!"

"Shit!"

(End of chapter)