Chapter 546 Plant DNA

A single, wealthy foreign man without a wife was taken away. Pang Jidong looked at his back, and his whole aura suddenly cooled down.

Like a student who had exhausted all his energy and completed all his summer homework in three days, he stood there blankly, losing the strength to speak and having no motivation to do anything.

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

He still needs to continue studying, he cannot stop. Of course, it's not okay to be so weak.

Pang Jidong unbuttoned his shirt, loosened his shirt, and said, "I'm just not ready to arrest the suspect."

"What preparations are needed?" Jiang Yuan smiled.

Pang Jidong couldn't help but recall the criminal suspects he had arrested, and smiled: "That's right."

Jiang Yuan winked at Mu Zhiyang and asked him to go up and comfort Pang Jidong.

Mu Zhiyang is in a bit of a dilemma, let him block bullets, he is quite skilled now, but you say let him comfort people...

He has almost no accumulation in this area.

Mu Zhiyang thought about it and said, "Team Pang, the eucalyptus is broken. Let's celebrate together tonight. Do you want to sing K?"

Pang Jidong smiled bitterly: "This kind of eucalyptus must be submitted for inspection to be considered truly solved. When it comes to foreigners, the prosecutor's requirements for evidence must be very high, and maybe we will be asked to supplement the investigation."

As he spoke, he looked at Jiang Yuan.

Jiang Yuan lowered his head and made preparations for the survey, as if he hadn't heard him at all.

Pang Jidong then asked directly: "Captain Jiang, can we get evidence? It's best if it's conclusive."

Jiang Yuan then asked: "As for forensic botany, you have been studying it for a while. What evidence do you think we have now that can be conclusive?"

Pang Jidong was stunned.

Wasn't it me who asked the question? Why did you get asked back?

Then shall I answer?

My scalp is itching again... I need to change my shampoo when I go back today...

"I think it might be more difficult to convict based on pure plant evidence." Pang Jidong answered after thinking for a long time.

"Why?" Jiang Yuan asked.

Pang Jidong said: "Forensic botany is not very familiar in China. If the pollen map is to be used for convictions, does it have to be specially explained? In terms of argument..."

"It's indeed possible." Jiang Yuan nodded. The judicial system is an industry that is particularly slow to accept new things. It can also be explained by a preference for only using mature technologies, or it can be explained by a distrust of technology itself, or a distrust of everything.

Things like DNA have been applied very quickly, more than 10 years later, and have gone through many arguments and tug-of-war. Other evidence, such as recording evidence, is still being debated. The authentication of evidence in the computer field is also very slow, including evidence such as WeChat chats, which are commonly used in the investigation stage, and court arguments are still very complicated.

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

"I'll do an on-site investigation first. However, I have a suggestion during the interrogation." Jiang Yuan was fully dressed and took samples while saying, "During the interrogation, we can start with plant DNA."

"As for plant DNA..." Pang Jidong hesitated, lowered his voice, and said, "Are there many plants with the same DNA?"

Jiang Yuan clicked his tongue twice and couldn't help but look at Pang Jidong with special eyes: "I've been away for three days. You really listened to Pang Pang."

"Hehe... You worked so hard to say it, but I can't even remember it." Pang Jidong rubbed his head and smiled. Although he didn't know why Jiang Yuan wanted to teach him things, Pang Jidong was still grateful. He is like a wild duck that has been adopted for a short period of time. Although it is hard to say thank you to people who are willing to feed him food, he says thank you many times in his heart. If the speed at which the food is forced into his mouth is slower, the thank you will be even greater. a bit more.

Mu Zhiyang looked at it with wide eyes, his eye circles were almost red, and he smiled and said: "What does the Pangda team mean? I didn't even understand."

Jiang Yuan then looked at Pang Jidong and said, "Team Pangda, please tell me."

Pang Jidong sorted out his language, as if answering an exam question, and said: "Because plant reproduction is not necessarily sexual reproduction, many are asexual reproduction. Therefore, sometimes the dominant species will continue to expand, as if watching If you check the DNA of a large area of ​​willows, they might all be the same. Roses, potatoes, poplars, and apple trees are all similar. In addition, there are factors such as the distance the pollen travels, so I want to use the DNA of a single plant to prove it. I’ve been here before, but it’s still a bit difficult.”

Jiang Yuan nodded, satisfied with Pang Jidong's speech. Although there is still room for discussion, the answer to this level within just a few days is still quite good.

Pang Jidong also had a sense of accomplishment and naturally commented, saying: "Nowadays, people are spoiled by DNA. They always want 100% accuracy. How can such a high accuracy be achieved? Until now, some media have been If you shout when there is no DNA evidence, they will know the DNA..."

When Pang Jidong said this, he came to his senses and said, "You are planning to make DNA out of all the pollen you found, and then prove it? This is actually appropriate. Some plants reproduce asexually, and some do not. Moreover, if the DNA of various plants also matches, it cannot be explained by coincidence. "

"Moreover..." Jiang Yuan added: "I guess the suspect may not understand biology. Does he understand that plant DNA and animal DNA are different?"

Pang Jidong's eyes lit up. Yes, this thing must be very difficult. If he hadn't studied biology textbooks at night in the past few days, he would have been dizzy for 49 hours a day.

The owner of the single-family villa in front of him looked like a man with a mental problem and rich parents. He was just being deceived.

"I'll call the interrogator and arrange the story of DNA matching for him. Most people would confess when they heard that there was a DNA match." Pang Jidong said, laughing, and suddenly felt a sense of intellectual superiority.

Jiang Yuan also smiled and said: "In fact, it doesn't matter if he understands. If he understands, he'll be more afraid."

The pollen map has been confirmed, which is equivalent to a variety of plant DNA matches. Even if the uniqueness of plant DNA is not as strong as that of animal DNA, such a large number of plant DNA matches is more than enough, not to mention the ratio problem.

If I have to say anything, it is to explain forensic botany to the prosecutor and the judge, which requires a lot of energy. So, if I can get a confession, that would be the best.

After saying what I should say, Jiang Yuan led the people to conduct a detailed on-site investigation and took a large number of samples.

When he investigated the fallen leaves in the backyard, Jiang Yuan dug out a pile of bones from it.

"There are no human bones." Jiang Yuan quickly went through all the rotten or semi-rotten bones. With the level 3 forensic anthropology, he classified them very quickly.

"No wonder there is a bad smell here. He used the smell of rotten leaves to cover the rotten smell of these things." Mu Zhiyang felt cold in his heart. In such an environment, it was not a problem to deal with a few people. He couldn't help asking: "Is this guy practicing or what?"

"Maybe he is doing an experiment to test the time it takes for the body to rot." Jiang Yuan's first thought was a corpse farm.

For many things about the human body, human research is insufficient. Medical ethics is a very complicated thing. Not many forensic doctors can get through it, and even fewer can do experiments.

A suspect who is willing to test key data such as the time it takes for a corpse to decompose can be called precious.

"You can do this..." Mu Zhiyang was speechless.

Pang Jidong even muttered: "I wonder what he has been doing in the past year."