National Forensic Doctor

Luojin City Criminal Police Detachment.

Several young criminal policemen quickly walked in and greeted Pang Jidong. They also said from afar: "Good morning, Team Pangda."

Pang Jidong was like a wandering spirit, holding a cup of coffee in his hand and moving slowly. If it weren't for moving too slowly, the coffee would have spilled and burned his hand.

Several people thought that Pang Jidong hadn't heard, so they got closer and loudly said: "Good morning, Pang Pang Team."

"Ah...morning...morning." Pang Jidong raised his head and replied to several people, his expression still stiff.

Several young detectives smiled and climbed up the stairs. When they reached the third floor, they smiled at the people around them and whispered:

"What happened to the Pangda team? Their eyes are straight."

"It's a bit like the feeling I have after running five kilometers. I can't think of anything, my head can't turn, and I have to wait for energy to come up."

"It's a bit like the state I was in before the joint entrance examination. Especially when making up classes, the teacher is watching you teach. After a class, my head feels full."

"You'd better fill up only your head..."

meeting room.

After everyone arrived, the detachment leader immediately held a situation analysis meeting for the second sexual invasion.

Not counting the prompting factor of the incident, the case that this special team is named after 110 is the most urgent case that Luojin City wants to investigate.

Not only is the crime itself very bad, but the key point is that criminals who have not been punished are very likely to commit crimes again.

The current suspension may be due to a variety of reasons. Maybe the inmate was hit by a car and died, maybe the inmate got wind immediately, or maybe the inmate was hit by a car on the way to have barbecue, but he was not dead at the time, but was hit by a car again on the way to the hospital and suffered severe pain. Died in the ambulance...

But it is also possible that the prisoner just encountered something but did not die. As things end and the surrounding environment changes, he will decide to do it again.

Serial rape is the same as serial murder. The murderer has some psychological problems. It is wishful thinking to expect him to stop automatically by his own will or other reasons. Catch them and kill them while they are young is the most reasonable solution.

In addition to the members of the Luojin City Criminal Police Detachment, there were also Cui Xiaohu and Li Haochen from the ministries and commissions.

Forensic botany is still quite rare. Although the ministry is useful, it is rarely used. Moreover, most of it is done by outside botanists. Unlike police officers like Jiang Yuan, who can finish the job in one go, it is equivalent to a one-time solution.

Ministries and commissions also have high expectations for Jiang Yuan.

If this thing is done well, a lot of the accumulation can be broken, and it can last for a long time. Just like after the advent of DNA technology, it became possible to detect eucalyptus during the Napoleonic era.

After a brief narration, Jiang Yuan turned on the microphone and said: "

"The regional characteristics of this crime are relatively obvious. The criminals should be very familiar with the eight sites and their surroundings, at least they have stepped on them before. Although they have been apart for a long time, they still hope to check the surveillance."

The detachment leader immediately said: "No problem, let the Fourth Brigade be in charge, Lao Pang."

"Um..." Jiang Yuan would not interfere with the leader's deployment of troops before, but this time he took on the task and bit the bullet and said: "Wang Zhi, I have just become acquainted with Pang Pang's team, can you continue to follow Pang Pang? The team checks the eucalyptus."

Wang Zhi couldn't help but look over.

Pang Jidong's face was blank and his eyes were clear. He had been fed so much by Jiang Yuan in the past few days, and it felt like he couldn't hold it anymore. But when it came to being mature, he didn't know if it was considered mature after his brain was burned.

"It works. If you like Lao Pang, let him continue to cooperate with you." Wang Zhi followed suit and assigned a new person to be responsible for image surveillance.

The Luojin City Bureau does not have a dedicated picture investigation team, mainly because conditions do not allow it. There is no establishment to accommodate so many technical personnel, so for the time being, ordinary police are still used to do the work of picture investigation by watching the surveillance with their eyes.

In this case, it is unlikely that extraordinary results will be achieved.

Jiang Yuan did not pursue this either, and continued: "If everyone agrees that the prisoner lives nearby, I actually have another way to find the prisoner."

"Say." Wang Zhi looked over in surprise. He had received Jiang Yuan's report before, and he read it at his desk for a long time. He didn't think of a plan to catch the person, but he didn't expect that Jiang Yuan could give something here.

Jiang Yuan pondered for a moment and said, "We identified the eight sites based on the spores on the four victims, mainly the spores in their clothes. But from another perspective, the spores on the victims' clothes In fact, the powder does not only come from the crime scene, but a smaller part comes from the perpetrator, that is, the criminal..."

Wang Zhi's eyes lit up when he heard this, and he immediately asked: "Can we find the location of the prisoner now?"

"You can delineate a rough location, but this is more complicated and there is a certain probability of error." Jiang Yuan turned to look at Pang Jidong and said: "Team Pang, if I told you before about the plan to find the prisoner, you can give me Wang Zhi, tell me."

Simple cramming education also requires questions and assessments, otherwise how can we consolidate knowledge and establish our own knowledge structure.

Pang Jidong was a little stupid. Isn't this the stage for your performance? You ask me, how did I know... Hey, I seem to really know a little bit.

Pang Jidong touched his newly grown brain and frowned suspiciously.

"Lao Pang?" Wang Zhi urged.

Pang Jidong coughed twice and said: "According to what Captain Jiang said before, it seems that we can find some pollen maps other than the pollen map. There are big pollen maps and some small pollen maps. The difference in the middle may be caused by the eucalyptus prisoners. That’s what you mean, right?”

He turned to ask Jiang Yuan.

"It's not completely accurate, but it's okay... Just understand it and use it." Jiang Yuan didn't expect Pang Jidong to master forensic botany. He only needed people who knew how to master forensic botany.

From Jiang Yuan's understanding, as long as Pang Jidong can grasp the boundaries of forensic botany and know which clues forensic botany can produce and which clues are powerless, that's basically it.

Of course, Pang Jidong should also know some basic things, so as to determine the value of the clues. It's like there are two clues pointing to two investigation directions at the same time. One clue is brought by DNA and the other is brought by footprints. There is no doubt that you must follow the DNA clues because DNA clues are more reliable than footprint clues. Too much.

That is, DNA evidence has a higher degree of confidence.

Forensic botany is more sophisticated in terms of confidence. For example, the confidence of pollen maps is much higher, while the confidence of individual pollen will be much lower. Large amounts of pollen are different from sporadic pollen. Wind-borne pollen The confidence level is lower than that of insect vectors and lower than that of algae...

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

Pang Jidong looked at Jiang Yuan in a daze.

"Speak first." Jiang Yuan continued to give him a chance.

"What do I know...but...if it's within the area, is it possible to find a place where the pollen map of this difference matches the eucalyptus?" Pang Jidong knocked on his head, feeling that something was growing inside. Things that don't belong to you.

Wang Zhi looked at Jiang Yuan and asked, "Is it possible?"

Jiang Yuan nodded and added: "That's almost the same idea, but you have to consider that the source of the pollen on the prisoner must be more than just his home and location. In short, if you search like this, it's impossible to say that you can accurately find the only location. You have to do some investigation. place."

"That's enough." Wang Zhi felt a lot more relaxed. He looked at Pang Jidong and said with a smile, "Old Pang is okay. I learned something."

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

"I've been following Captain Jiang recently and heard a lot of things." Pang Jidong felt a little embarrassed and said modestly, "I've learned a little bit, but I haven't learned enough."

Jiang Yuan opened the system page and took a look. The task was not completed, which meant that he did not learn enough.

Following Pang Jidong's words, Jiang Yuan said: "My teaching time is too short. I happen to be partnering with the Pangda team in the past few days. I will try to spend as much time as possible."

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

It's not that he doesn't want to learn, he just thinks that cramming teaching is too cruel, and he doesn't like the feeling of being unconscious at any time.

People around me don’t need money to encourage me, so I don’t care about so much, and rush out:

"Lao Pang is amazing!"

"Lao Pang can do it. Make full use of your partner's advantages."

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

Pang Jidong waved his hand quickly and corrected: "It's none of that, I'm so old."

"It's okay. Since Pang Pang is willing to learn, I will teach him well. Let's arrest him." Jiang Yuan patted Pang Jidong on the shoulder, looking familiar.

Pang Jidong wanted to say I didn’t, and he wanted to say no, but he had to arrest people...