Chapter 517: Say You Can, You Can

Luojin Municipal Criminal Police Detachment.

Several young criminal police officers walked in quickly, greeting all the way, seeing Captain Pang Jidong, also said from afar: "Pang Brigade, morning."

Captain Pang Jidong was like a wandering soul, holding a cup of coffee in his hand, moving slowly. If it weren't for moving too slowly, the coffee would overflow and burn his hand.

Several people thought Captain Pang Jidong didn't hear, approached a little, and shouted loudly: "Pang Brigade, morning."

"Ah... morning... morning." Captain Pang Jidong then looked up and replied to several people, his expression still stiff.

Several young criminal police officers smiled and climbed the stairs. When they reached the third floor, they laughed at the people around them while discussing in a low voice:

"What happened to Pang Brigade? His eyes are straight."

"It's a bit like the feeling after I run five kilometers, I can't think of anything, my brain doesn't turn, I just have to be stupid and wait for energy to supply."

"It's a bit like my state before the joint entrance exam, especially when making up lessons, the teacher stares at you and teaches, a class down, the brain is like being stuffed."

"It's best if you only stuff your brain..."

Conference room.

After everyone arrived, the detachment leader immediately held a case analysis meeting for the secondary sexual assault case.

Not counting the urging factors of the current case, this special task force case named 110 is the case that the Luojin Municipal Bureau wants to investigate and handle most urgently.

Not only is the case itself very bad, the key is that the criminal who has not been punished is very likely to commit crimes again.

The stop at the current stage may have many reasons. Perhaps the criminal was hit by a car and died, perhaps the criminal died on the horse, or the criminal was hit by a car on the way to eat barbecue, didn't die at the time, and was hit by a car again on the way to the hospital, and died of pain in the ambulance...

But it is also possible that the criminal just encountered some things, but did not die. With the end of things and the change of the surrounding environment, he will decide to commit crimes again.

Serial rape is the same as serial murder. The murderer has more or less psychological problems. Expecting him to stop automatically relying on his own will or other reasons is really wishful thinking. Catching him and killing him is the most reasonable plan.

In addition to the members of the Luojin Municipal Criminal Police Detachment, there are also Cui Xiaohu and Li Haochen from the ministry.

Forensic botany is still quite rare. Although the ministry has used it, it is used very little, and most of them still find outside botanists to do it. It is not like Jiang Yuan, a police officer who can solve the case directly at once, which is equivalent to a one-time solution.

The ministry also has high expectations for Jiang Yuan.

If this thing is done well, the cold cases that can be solved will be many, and it can be traced back for a very long time. Just like after DNA technology appeared, cases in the Napoleonic era had the possibility of being solved.

After a simple narrative, Jiang Yuan pressed the microphone and said: "

"The regional characteristics of this case are relatively obvious. The criminal should be very familiar with the eight scenes and the vicinity. At least he stepped on the spot before the case. Although it has been a long time, I still hope to check the monitoring."

The detachment leader immediately said: "No problem, let the Fourth Brigade be responsible, Old Pang."

"That..." Jiang Yuan didn't interfere with the leader's arrangement of troops before, but this time, carrying the task, he bit the bullet and said: "Wang Zhi, I just got familiar with Pang Brigade, can I continue to follow Pang Brigade to solve the case."

Wang Zhi couldn't help but look over.

Captain Pang Jidong was full of confusion, full of clarity. He had been poured too much by Jiang Yuan in the past few days, and he felt that he was full and couldn't be stuffed. But to say he was familiar, he didn't know if it was familiar after his brain burned.

"It's fine, you like Old Pang, let him continue to cooperate with you." Wang Zhi followed the trend and assigned new people to be responsible for image monitoring.

The Luojin Municipal Bureau does not have a special map investigation brigade. It is also because the conditions do not allow it. There is no establishment to accommodate so many technical personnel. For the time being, ordinary police officers are still used to do the work of map investigation by watching monitoring with their eyes.

Under these circumstances, extraordinary map investigation results are also unlikely.

Jiang Yuan didn't pursue this, and continued: "If everyone agrees, the criminal lives nearby, in fact, I have another way to find the criminal."

"You say." Wang Zhi looked over with some surprise. He had read Jiang Yuan's report before, and he had thought about it for a long time, but didn't think of a plan to catch people, but he didn't expect Jiang Yuan to give something here.

Jiang Yuan pondered for a while and said: "We determined the eight scenes based on the spores on the four victims, mainly the spores in the clothes. But from another angle, the spores on the victims' clothes are actually not just from the crime scene, but also a small part from the perpetrator, that is, the spores on the criminal..."

Wang Zhi's eyes lit up when he heard it, and immediately asked: "Can this find the criminal's location?"

"Can circle a rough location, but this is more complicated, there is a certain probability of error." Jiang Yuan turned to look at Captain Pang Jidong and said: "Pang Brigade, tell Wang Zhi about the plan I told you before to find the criminal."

Simple stuffing education also needs questioning and assessment, otherwise how to consolidate knowledge and establish one's own knowledge structure.

Captain Pang Jidong was a bit stupid. This is not your stage to perform? You ask me, where do I know... eh, I seem to really know a little.

Captain Pang Jidong touched his brain that had just grown

"Old Pang?" Director Wang urged.

Captain Pang Jidong coughed twice and said, "According to Team Leader Jiang's previous explanation, it seems we can find some pollen spectra that are outside the pollen spectrum. That is, there are large pollen spectra and small ones; the difference between them might be what the perpetrator brought... is that the meaning?"

He turned his head to ask Jiang Yuan.

"Not entirely accurate, but that works... just understand it that way for now." Jiang Yuan didn't expect Captain Pang Jidong to master forensic botany; he only needed him to know how to utilize those who had mastered it.

From Jiang Yuan's perspective, as long as Captain Pang Jidong could grasp the boundaries of forensic botany—knowing which clues could be produced by forensic botany and which were beyond its reach—that would basically be enough.

Of course, Captain Pang Jidong should also know some of the principles so he could determine the value of the clues. It's like having two clues pointing in two investigative directions simultaneously: one clue brought by DNA and one by footprints. Without a doubt, you follow the DNA clue, because DNA clues are far more reliable than footprint clues.

In other words, DNA evidence has a higher degree of confidence.

Forensic botany involves even more scrutiny regarding confidence levels. For instance, the confidence level of a pollen spectrum is much higher, while the confidence level of a single pollen grain is much lower. A large amount of pollen is different from sporadic pollen, and the confidence level of anemophilous pollen is lower than that of entomophilous pollen, which is lower than that of algae...

"To be specific, how do we find the criminal suspect?" Director Wang couldn't listen anymore.

Captain Pang Jidong looked at Jiang Yuan in a daze.

"You speak first." Jiang Yuan continued to provide opportunities.

"What would I know... but... if they are within the area, is it possible to find the perpetrator by finding the place that matches this differential pollen spectrum?" Captain Pang Jidong tapped his own head, feeling as if something that didn't belong to him had grown inside.

Director Wang looked at Jiang Yuan and asked, "Will it work?"

Jiang Yuan nodded and added, "Something like that, but we have to consider the source of the pollen on the perpetrator; it certainly isn't just their home and the location. In short, searching this way won't allow us to accurately find a unique location; we will still have to investigate a few places."

"That's enough." Director Wang felt much more relaxed. He looked at Captain Pang Jidong and smiled, "Old Pang is doing alright, learning a thing or two."

Everyone in the conference room was familiar with Captain Pang Jidong and nodded in approval.

"I've been following Team Leader Jiang lately and have heard quite a few things." Captain Pang Jidong felt a bit embarrassed and said modestly, "I've learned a little, but not enough yet."

Jiang Yuan opened the system page and took a look; the task was not yet complete, which meant he indeed hadn't learned enough.

Following Captain Pang Jidong's words, Jiang Yuan said, "It's because the time I've spent teaching has been too short. Since I'll be partnered with Brigade Leader Pang for the next few days, I'll try to make more time."

Captain Pang Jidong's smile changed slowly and gradually stiffened: "That's not necessary..."

It wasn't that he was unwilling to learn; he just felt that cramming-style teaching was too cruel, and besides, he didn't really like the feeling of fainting at any moment.

The people around him, offering encouragement for free, didn't care about that and poured it out:

"Old Pang is impressive!"

"Old Pang is doing great, making full use of the partner advantage."

"From now on, Captain Pang Jidong will be the number one botanist in Luojin City!"

Captain Pang Jidong hurriedly waved his hands to correct them: "I can't claim that; I'm getting on in years."

"It's fine. Since Brigade Leader Pang is willing to learn, I will certainly teach him well. Let's go catch the person." Jiang Yuan patted Captain Pang Jidong on the shoulder, looking very familiar.

Captain Pang Jidong wanted to say I didn't, wanted to answer no, but he couldn't not catch the person...