Chapter 647: No Strength (Chapter 2)

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Early in the morning.

Jiang Yuan came to the forensic laboratory early, made himself a cup of tea, tidied up the desk, and then started a day's work - looking at the microscope.

The blood-stained clothes as evidence have been cut into several pieces for Jiang Yuan to pick up pollen under the microscope.

Unlike what many people imagine, when facing evidence, criminal scientists often do not aim to preserve its original form. Common things like sheets and pillowcases at the crime scene, when testing blood or rice green liquid, are roughly cut out, and then soaked in reagents for further testing.

In addition, paper stained with other substances is also handled in a similar way.

Some people may feel uneasy about the destruction of this original state, but from another perspective, many evidence will not be taken back in its original state when collecting evidence.

For example, if someone has died on the bed sheet, it is not necessary to pack the entire bed sheet back, and it is even more unnecessary to pack all four sets of bedding back. If it is a technician from the criminal department, the most normal way is to cut a piece back.

As for whether evidence will be missed, it depends on the on-site ability of the investigators. Generally speaking, if there is a little doubt, they will pack more things back, otherwise, just cut a piece and bring it back as evidence.

Of course, depending on the importance of the case, the volume of the package will be larger.

For example, if it is a burglary, and the small eucalyptus with low eucalyptus value, you can't pack more back. Even if the evidence room doesn't say anything, the plaintiff will not be happy that you pack up a truckload of items from his house for a few thousand yuan of eucalyptus.

Jiang Yuan picked up the pollen one by one.

The size of the pollen varies greatly. The smallest pollen is only about 4 microns in length, and the largest pollen has a diameter of 200 microns. In terms of morphology, many species of pollen are round and thorny, some are abalone-shaped, and some are triangular...

In general, if it is only LV1 forensic botany technology, it can easily distinguish the pollen. However, technicians with insufficient level will encounter many problems when judging the specific species.

As for the case, LV1 forensic botany can hardly provide direct clues, and can only verify the evidence at most. Or, when facing a single variety of pollen, narrow the scope.

LV2 forensic botanists should have greatly enhanced their ability to distinguish, but they also need to constantly consult materials for verification. Needless to say, in such a time-consuming project, constantly consulting materials means that the progress bar is likely to be stuck.

At LV3, most pollen does not need to be consulted, at least not in large quantities. In this case, the practicality is greatly enhanced.

Jiang Yuan's current forensic botany has reached LV4, and many pollen can be recognized at a glance. Moreover, for some common pollen, he can also distinguish some common ornamental subfamilies. In the eyes of those who know the business, it is not an exaggeration to shout a Buddhist name.

Therefore, the busy forensic doctors of the Beijing Bureau in the same laboratory found that Jiang Yuan was picking up pollen constantly, and he did not need any reference materials, and was making notes in the notebook next to him.

The TN brand leather notebook looks like a silly white-collar worker at first glance, but the forensic doctors in the Beijing Bureau all know a little about modern cutting-edge technology - the training in various places is also closely related to the Beijing Bureau, so this kind of thing that seems particularly unscientific at first glance makes several forensic doctors suspicious.

"Don't make it up." The suspicion system of the forensic doctor started to go online.

For criminal police, 800 suspicions a day is considered a small number. Facing the unfamiliar Jiang Yuan, even if he is famous, suspicion is still unstoppable. The organizer of the Hu Ge case was the Mongolian detective, but it turned out to be a bunch of rotten vegetables.

"Xiao Li, go and take a look." The senior forensic doctor in the office thought about it and whispered a few words to the young forensic doctor next to him.

Xiao Li then stood up, pretended to be bored, and came to Jiang Yuan.

Jiang Yuan's notebook had already recorded a row of plant names, and Jiang Yuan had drawn five-pointed stars on several of them: Narcissus, Water-dropping Guanyin, Tiger Thorn Blossom...

Forensic doctor Xiao Li looked over unconsciously, thinking in his mind, why were these marked?

At this time, Jiang Yuan's eyes left the microscope and looked up at the forensic doctor next to him. As if he saw through his thoughts, he wrote the words "Hyacinth" on the notebook and marked five stars, saying: "The marked ones are all poisonous plants."

"Ah?" Xiao Li's surprise was half because of what Jiang Yuan said, and half because he thought his thoughts were exposed.

Jiang Yuan really guessed his thoughts. He has been working outside for more than a day or two. After more than a year of experience, most of the situations he encountered are the same.

Especially the technicians, they are actually more skeptical. Because the Muggles don't know the depth of technology, they think that fingerprints and DNA are automatically generated. It’s different for technicians. They know that some things are incredibly difficult, just like some math problems. They are completely confused and believe that someone can solve the problem, but they don’t believe that this person will appear next to them.

Jiang Yuan put his eyes on the microscope again and said: "The pollen taken out so far is mainly domestic, and there are pollen from a variety of poisonous plants. In addition, there are also some vegetable pollens, such as cucumber pollen. , pepper pollen, eggplant, loofah, pumpkin, onion... The owner of the clothes should have a place around him. "

At this moment, the attention of several forensic doctors in the office was attracted.

The most senior forensic doctor, Guo Xiang, stood up and came over, first asking: "Why don't you live in a vegetable garden or something like that?"

"Because there are mostly indoor plants, the types of ornamental plants are very complicated, and it should be relatively rare to mix poisonous plants in vegetable gardens." Jiang Yuan paused, and then said: "As far as the overall pollen map is concerned, it is more like The types of flowers and vegetables grown on the balcony are more diverse, while the varieties grown in the vegetable garden are relatively limited.”

Jiang Yuan's words belong to reasoning and judgment. Guo Xiang didn't hesitate, he just looked curious and said, "What does cucumber pollen look like? Can you take a look?"

"This." Jiang Yuan then showed Guo Xiang the pollen from the cucumber he picked up.

Under a microscope, cucumber pollen is bright green, slightly elliptical and irregular in shape, with dense wrinkles on it and three yellow grooves of different shades. The thickest groove has a thicker one. Irregular connective tissue.

Guo Xiang read it carefully, remembered it in his mind, said a few more words about the scene, returned to his seat, found an illustrated book on forensic botany on the intranet, and searched directly for cucumbers.

It's exactly the same.

Guo Xiang was not reassured enough, so he searched for the appearance of pollen from daffodils, peppers and other plants, and remembered it in his mind. Then he came to find Jiang Yuan, sat next to him, and used another microscope to look at the pollen he had sifted.

Sure enough it is similar.

Guo Xiang breathed a sigh of relief, and then he became more suspicious. He looked Jiang Yuan up and down and said, "I just checked and found that there are 250,000 kinds of angiosperms. The pollen of each kind looks like something you don't know." Maybe remember it. This is too exaggerated.”

"How is that possible?" Jiang Yuan smiled.

Guo Xiang also laughed.

Jiang Yuandao: "There is a pattern."

Guo Xiang's smile faltered: "250,000 kinds?"

"Of course that's impossible. It's not common. We have to identify the species before we can make a judgment." Jiang Yuan said the truth.

But for Guo Xiang, Jiang Yuan's modesty at this time was even more confusing.

As a technician, after verification, all Guo Xiang can do is to convince Jiang Yuan's judgment.

"So, if we don't consider the vegetable garden, what we are looking for is someone who grows vegetables at home?" Guo Xiang began to discuss specific clues.

Jiang Yuan pondered for a moment and said: "Actually, you don't have to think too much. Just take the place where the blood clothes were found as the radius and fly the drone first. In terms of the types of flowers and vegetables, I think the place where the blood clothes come into contact is , it should not be purely indoor, it must have sufficient sunlight and a certain area to grow such a variety of plants. If it is purely indoor, the light must be very good.”

"That's growing vegetables on the balcony or on the rooftop." Guo Xiang concluded.

"It may also be the green space of the community, or inside the courtyard." The forensic doctor next to him added.

Guo Xiang nodded obediently, and then said: "Can you please report to Captain Jiang? If you fly a drone, you have to consider the situation around the scene. I don't think there is a no-fly situation."

Jiang Yuan knew that he was trying to avoid taking away his own merit, so he said nonchalantly: "You go ahead and fight, it will be easier for your team to communicate. Besides, the forensic botany clues can only be mine, and you can't take them away." ”

He said it so plainly, which made Guo Xiang somewhat helpless.

Guo Xiang stopped talking, took out his mobile phone and made a call.

At this time, he recalled that this was the first good news after starting this book.

Guo Xiang turned back and glanced at Jiang Yuan. He had only been working for more than a day. In fact, he had not seen how Jiang Yuan had exerted his efforts. The results he obtained seemed to be quite mediocre, but the clues were real. For the people in the team, For detectives, this is the most important thing.