National Forensic Doctor

Chapter 683 Breakthrough

"The clothes are back."

Wang Chuanxing and Shen Yaowei returned together holding several large boxes of evidence. Wang Chuanxing put the objects into the cabinet and said, "The conditions of Zhengguang Bureau are really good. The evidence room is better than our newly built office."

"It can't be compared with those in the capital. Moreover, they are just bigger, and the decoration is just like that. Furthermore, the evidence room has no equipment. It's just a matter of ordering cabinets and buying a few computers." Huang Qiangmin was sitting in front of him. He curled his lips.

The capital's infrastructure cannot be compared to that of a small county town. Regardless of the high housing prices in the capital, when various departments build public facilities, it is still easy to achieve ambitious goals. A unit like the Zhengguang Bureau has a normal annual budget of more than 2 billion, so it is a good idea to root out those whose legs are thicker than their waists.

Wang Chuanxing was seconded to Ningtai County from the provincial capital. He was not that afraid of Huang Qiangmin. He smiled and said: "The evidence room has constant temperature and humidity. If I were to become an evidence, I would live like this." .”

"If you become an evidence, you will also go to the ice coffin of the anatomy center in the capital." Shen Yaowei was very sensible, and smiled at Huang Qiangmin and said: "The advantage of the capital is that the evidence is well preserved. I guess Captain Jiang can Mentioned quite a bit of pollen.”

When he said this, several people looked at Jiang Yuan who was sitting in front of the experimental table.

There is a microscope on the experimental table, and then there is a plate of tweezers and the like. It's possible to find help for this job, but the case is serious and the most favorable evidence at present is the pollen on the clothes. Jiang Yuan is too lazy to do the work of picking up pollen for the first time.

To be honest, teaching a forensic doctor who has never done similar work, and then watching and doing it for a while, answering some questions and solving some small episodes in the experiment, is probably more tiring than doing it himself.

"You don't know what you can find yet. You will know when you see it. Bureau Huang, please rest. This is not a job that can be done in one day." Jiang Yuan spread out various utensils and took out the first item from the evidence bag. A stench wafted out of the clothes after several years, and it was stronger than usual, like farts that had been covered for a long time, like gas but not air, solid but not solid, soft and hard...

Huang Qiangmin's breath was confused for a few seconds, and he put on the mask in a daze, and then said: "I'll sit with you for a while, I have nothing to do now. I'll check my phone, and then we'll find a delicious restaurant. In the evening Go eat something good. Use public funds. From Zhengguang Bureau."

When he said this, Wang Chuanxing and Shen Yaowei looked at each other and said hurriedly: "We will stay too. Although we can't help much, let's listen to Captain Jiang and Political Commissar Huang's greetings."

Huang Qiangmin smiled and took out his mobile phone: "By the way, let me show you the newly built detention center of our bureau. We are still working on the underground pipe network. Look at the construction standards, which means that this video cannot be made public, otherwise the prison will be broken. I will cry all my tears dry."

Jiang Yuan had seen it before, couldn't help but smile, and then focused on the microscope.

As he said just now, you won't know what you can see until you see the evidence.

Rain, various types of detergents, friction, time factors and environmental factors may cause some pollen to lose its adhesion or disappear completely.

However, overall, pollen is still a very strong evidence. It's not like blood or hair, which is a small calamine that can't be acidic or alkaline. Pollen has survived the mass extinction of life over the centuries. Volcanic ash, deep wells frozen, floods and wild beasts, beauties and stockings, hairy parasites, naked microorganisms, and nuclear radiation from across the ocean are all insignificant in the eyes of pollen.

Under the microscope, a lot of pollen looks like a fortress, with long and tough thorns, thick muscles, and densely packed fine mesh. If you magnify it tens of thousands of times, it looks like a space fortress with a sense of future technology. No matter how you look at it, you look like you're not easy to mess with.

If cartoonists get stuck, search for a few pollen illustrations and revise them, which will be much more powerful than making up Battlestar. The pollen pattern that looks a bit yellow can be drawn to the inside.

"Compositae pollen." Jiang Yuan shook his neck and started recording in his notebook.

There wasn't much pollen on the clothes, so Jiang Yuan picked out the obvious ones first.

Huang Qiangmin, who was still checking his cell phone next to him, immediately sat over and asked, "Chrysanthemum?"

"Asteraceae is not a chrysanthemum." Jiang Yuan continued to look at the microscope. While looking, he said subconsciously: "If we classify pollen according to it, there are three types of pollen in the Asteraceae, sunflower type, Senecio type, and spring type. It’s chrysanthemum-shaped. This one should be sunflower-shaped.”

"That means there were sunflowers at the crime scene?"

"It's not that simple. Because there are many types of sunflower-type pollen, including the sunflower family, the adenophora family, the aster family, the heliotrope family, and the marigold family. In addition, the inula family and the Seneca family also have this type of pollen. Various types of pollen..." Jiang Yuan was talking about tribes, and there are about 30 genera below, which are very complicated.

Most people who engage in forensic botany basically give up after hearing this.

Huang Qiangmin was also confused after hearing this, and frowned: "Just tell me if there are any sunflowers at the scene."

"Yes." What Jiang Yuan found was really a pollen from the genus Helianthus.

This judgment alone can drive normal botanists crazy. Sunflower-type pollen has similarities and differences, so it is not easy to judge. In fact, it should be very difficult.

Jiang Yuan came to a conclusion without consulting any information, which was equivalent to casting a spell instantly without a magic book. Unfortunately, there were only Muggles present, and no one could understand it.

"When Victim No. 3 was discovered, there were no sunflowers at the scene. So, we are already approaching the first scene?" Wang Chuanxing turned over and became emotional.

"It's still far from positioning." Jiang Yuan raised his head and glanced at Wang Chuanxing, then started pinching off another piece of pollen.

Wang Chuanxing shook his head: "Even so, it is already a breakthrough. Taking into account other considerations, such as the location of the victim's mobile phone on that day, the testimony of eyewitnesses, etc., maybe the first scene can be found."

Indeed, practicing forensic botany in the city is not as enjoyable as doing it in the wilderness.

But from another perspective, the sources of pollen in cities are also very single. Even pollen from common plants like sunflowers is not always available.

Jiang Yuan has the skills at hand, so he will not use such rough methods. Besides, the pollen on the clothes has already been tested. This time, all tests must be completed. Otherwise, if the case cannot be successfully solved in the future, the second test will be carried out. Not to mention the limited accuracy, a lot of information may be lost.

If the case is solved but not solved, the document work must be done well. This is also one of the reasons why Jiang Yuan can now rely on examination papers to solve cases.

Soon, Jiang Yuan scanned the pollen of willows and pine trees, and then camellias and clematis...

However, the most abundant pollen is sunflower pollen.

Jiang Yuan picked up the moment when he was a little doubtful about life. He suddenly raised his head and said, "Sunflowers are insect-borne."

"Huh?" Huang Qiangmin and others present didn't react.

"Wind vectors spread over long distances, while insect vectors spread over short distances. If it's a sunflower field, there will basically be beehives next to it." Jiang Yuan said while taking notes. When the time comes to find the place, it will be useful only if it matches one by one.

Generally speaking, the requirements for forensic botany are still very strict, but when used in detection, they are also a bit unreasonable.

Although the murderer organized the crime scene like a professional, how should he deal with forensic botany?

Friendly recommendation: "Being a doctor, you don’t have to be too normal"