Chapter 519

The foreign single rich man without a wife was taken away. Captain Pang Jidong looked at his back, and his entire aura suddenly cooled down.

Like a student who had used up all his strength to finish all his summer vacation homework in three days, he stood blankly in place, having lost the strength to speak and the motivation to do anything.

"What's wrong?" Jiang Yuan's emotional intelligence came online, and he asked Captain Pang Jidong with concern.

He still had to continue learning; stopping wouldn't do. Of course, being physically weak to this extent wouldn't do either.

Captain Pang Jidong unbuttoned his collar, loosened his shirt, and said, "It's just that I wasn't quite prepared, prepared to arrest a criminal suspect."

"What kind of preparation is needed for this?" Jiang Yuan smiled.

Captain Pang Jidong couldn't help but recall the criminal suspects he had caught before and also smiled: "That's true."

Jiang Yuan gave Mu Zhiyang a wink, signaling him to go up and comfort Captain Pang Jidong.

Mu Zhiyang was a bit troubled. If it were blocking a bullet, he was quite skilled at it now, but asking him to comfort someone...

He had almost no accumulation in this area.

Mu Zhiyang thought about it and said, "Brigade Leader Pang, the case is solved. Let's celebrate together tonight. Shall we go sing K?"

Captain Pang Jidong gave a bitter smile: "For this kind of case, it only counts as truly solved if it can be sent for prosecution. Involving a foreign national, the prosecution's requirements for evidence are certainly very high. They might even ask us to conduct supplementary investigations."

As he spoke, he looked at Jiang Yuan.

Jiang Yuan was lowering his head, making preparations before the scene investigation, as if he hadn't heard his words at all.

Captain Pang Jidong then asked directly: "Team Leader Jiang, can we get the evidence? The kind that is irrefutable, preferably."

Jiang Yuan then asked: "Regarding forensic botany, you've also been studying it for a while. What evidence do you think we have now that could be considered irrefutable?"

Captain Pang Jidong was stunned.

Wasn't I the one asking the questions? How did I get asked back?

Should I answer?

My scalp is starting to itch again... I have to change my shampoo when I go back today...

"I think, if it's just plant evidence, it might be relatively difficult to convict," Captain Pang Jidong thought for a long time before answering.

"Why?" Jiang Yuan asked back.

Captain Pang Jidong said: "In terms of forensic botany, the country is still not very familiar with it. If the pollen spectrum is to be used for conviction, doesn't it need to be specifically explained? In terms of argumentation..."

"That is indeed possible." Jiang Yuan nodded. The judicial system is an industry that is particularly slow to accept new things; it can be interpreted as only liking to use mature technology, or it can be interpreted as a distrust of technology itself, or a distrust of everything.

Things like DNA have been applied very quickly, yet it was still more than 10 years late, and it went through multi-party argumentation and tug-of-war in the middle. Others, such as recording evidence, still have tug-of-war, and the certification of evidence in the computer field is also very slow, including evidence like WeChat chats, which are already very common in the investigation stage, but the court argumentation is still very complicated.

Captain Pang Jidong actually wanted to hear a negative answer from Jiang Yuan. He didn't expect Jiang Yuan to say the same thing, and suddenly he became worried.

"I'll do the scene investigation first. However, I do have a suggestion for the interrogation." Jiang Yuan was dressed neatly, and while taking samples, he said: "During the interrogation, you can start from plant DNA."

"Plant DNA..." Captain Pang Jidong hesitated for a moment, his voice lowered, and he said: "Aren't there many plants whose DNA is the same?"

Jiang Yuan clicked his tongue and couldn't help but look at Captain Pang Jidong with new eyes: "Three days of separation, Brigade Leader Pang, you really did listen."

"Hehe... you were so diligent in saying it, I couldn't help but remember it." Captain Pang Jidong smiled while touching his head. Although he didn't know why Jiang Yuan wanted to teach him things, Captain Pang Jidong was still grateful. He was like a wild duck adopted for a short time; for someone willing to feed him, although he couldn't say it out loud, he had said thank you many times in his heart. If the speed of being force-fed food were a little slower, there would be even more thank yous.

Mu Zhiyang watched with wide eyes, his eye sockets almost turning red, and smiled: "What does Brigade Leader Pang mean? I didn't understand it at all."

Jiang Yuan then looked at Captain Pang Jidong and said: "Brigade Leader Pang, you explain it."

Captain Pang Jidong organized his language, as if answering an exam question, and said: "Because plant reproduction is not necessarily sexual reproduction; many are asexual. Therefore, sometimes dominant species will constantly expand, just like looking at a large patch of willow trees; if you check the DNA, they might all be the same. Roses, potatoes, poplars, apple trees, these are all similar. Coupled with factors such as the distance of pollen dispersal, it is still somewhat difficult to use a single plant's DNA to prove that someone has been there."

Jiang Yuan nodded, expressing satisfaction with Captain Pang Jidong's statement. Although there were still points to be discussed, it was quite good to be able to answer to this extent in just a few days.

Captain Pang Jidong also had a sense of accomplishment and naturally commented: "People nowadays are spoiled by DNA; they always want 100% accuracy. Where is there such high accuracy? It's gotten to the point where some media shout as soon as they see there is no DNA evidence. They only know about DNA..."

Captain Pang Jidong realized something when he said this and said: "You are planning to take all the pollen found and do DNA on it, and then prove it, right? This is actually appropriate. Some plants reproduce asexually, but some don't. Moreover, if the DNA of various plants also matches, then it cannot be explained by coincidence."

"And..." Jiang Yuan added: "I estimate that the criminal suspect doesn't necessarily understand biology, right? Does he understand that plant DNA and animal DNA are different?"

Captain Pang Jidong's eyes lit up. That's right, how difficult is this stuff? If he hadn't been cramming biology textbooks at night for the past few days, he would have fainted for forty-nine hours a day.

The owner of this detached villa is clearly the type whose brain has problems and whose parents have money; just bluff him.

"I'll call the person in charge of the interrogation and have them arrange the DNA matching story for him. Most people, upon hearing that there is a DNA match, will confess." Captain Pang Jidong said, laughing out loud, suddenly feeling a sense of intellectual superiority.

Jiang Yuan also smiled and said: "Actually, it doesn't matter if he understands. If he understands, he will be even more afraid."

The pollen spectrum is determined, which is equivalent to having multiple plant DNA matches. Even if the uniqueness of plant DNA is not as strong as animal DNA, having so many plant DNA matches is more than enough, not to mention the issue of proportions.

To put it another way, explaining forensic botany to prosecutors and judges requires a lot of energy. So, if you can bluff a confession, that's the best.

Having said what needed to be said, Jiang Yuan led the people to start a detailed scene investigation and took a large number of samples.

When investigating the pile of fallen leaves in the backyard, Jiang Yuan even dug out a pile of bones from inside.

"No human bones." Jiang Yuan quickly went through all these rotted or semi-rotted bones; his LV3 forensic anthropology classified them extremely quickly.

"No wonder there's a stench here. He's using the stench of rotting leaves to cover up the stench of these things rotting." Mu Zhiyang felt a chill in his heart. In such an environment, disposing of a person or two wouldn't be a problem. He couldn't help but ask: "Is this guy practicing or what?"

"Maybe he's doing an experiment, testing the time it takes for a body to rot or something." Jiang Yuan's first thought was a body farm.

Regarding many things about the human body, human research is insufficient. Medical ethics is a very complicated thing; not many forensic doctors can break through it, and even fewer can conduct experiments.

A criminal suspect willing to test key data such as the time of body decay on-site can already be called rare and commendable.

"It can even be like this..." Mu Zhiyang couldn't speak after saying that.

Captain Pang Jidong muttered: "I don't know what he's been doing for the past year or so."