civil forensic

Trace Evidence Laboratory.

White paint, white table, white experimental equipment, and the experimenters in white coats...

This is the most advanced laboratory of the Criminal Division Center of Luojin City Bureau.Universities or research institutes may have more advanced laboratories than this, but in the field of criminal investigation, the trace evidence laboratory is considered to be a ceiling-level existence.

Among other things, the requirements of a clean laboratory are much higher than the overall cost of an ordinary laboratory. The smaller the size of various instruments and equipment, the more expensive they are.

And the experimenters working in the trace evidence laboratory are generally full-time professionals--other criminal professional positions, in addition to forensic medicine usually emphasizing professionalism, require professional certificates and education and training, such as on-site investigation, trace inspection or Drug testing, physics and chemistry, etc., are all elites.

Although the relevant police academies also offer related majors and courses, the internal requirements of the police are not strict.It is not surprising that some police officers take up their posts after a few months of training.

The requirements for trace evidence laboratories are relatively high, and because of the high construction costs and high operating costs, the requirements for personnel in the laboratories are naturally high.

But such a group of people, facing Jiang Yuan who was invading from outside, still wisely chose to be obedient.

In fact, Jiang Yuan didn't show any offensive power, but his operation itself was extremely offensive.

It's like everyone is playing basketball together. Someone enters the court, smiles politely at everyone, and then starts mid-range shots, making multiple hollow shots in a row. , made multiple hollow hits in a row, everyone started to pay attention while admiring, and then, this guy dribbled into the basket and dunked many times in a row...

Of course, everyone still wants to applaud and praise, but at this time, the praise feels a bit forced, as if if you don't praise, you are a big fool who is jealous of talents.

What if the guy dribbles back to the three-point line again and starts dunking from the free throw line?

Cheers are due, but a little distance from the pitch also seems warranted.Otherwise, it would be too uncomfortable to serve as a background board for others.

Especially when many students raised their mobile phones and gathered around.

Jiang Yuan has almost started to jump and dunk from the free throw line now, and he dunks in a different position.

No way, he also just acquired the skills of forensic botany, so he is not very familiar with various technologies, so he naturally has to go online to operate, it is impossible to deliberately lower the technical level in order to hide his strength and bide his time.

So, you can see Jiang Yuan dyeing and embedding the pollen, spores and organic residues, watching him put the embedded samples on the glass slide, and then classify these things under the microscope, Write a lab report.

Identifying pollen and spores is actually a difficult task.

Why are there so few botanists in the world, especially botanists who have gone deep into the field of pollen?Is it because everyone doesn't like it?

It is because it is difficult and not profitable!
Many pollens look alike to the uninitiated.Some pollens are indeed similar, and the species is almost indistinguishable, which is either rhetorical hyperbole or indistinguishable.For example, the pollen of roses is basically indistinguishable from the pollen of apples, hawthorns or wild roses.

As for what is easy to distinguish, that is also for botanists.There are too many types of pollen in the world, even botanists, there are only a few who specialize in pollen, and most people only know the pollen in their own area.

Therefore, similar to skull repair, forensic botany is an ultra-high-end skill with explosive difficulty.

Of course, the effect will also explode.

After all, this skill itself is extremely difficult to guard against, and there are even fewer people who know it.

It was not until the 90s that the United States tried to carry out some applications of forensic botany, and the results were good, but botanists showed little interest and the difficulty was too great, and it is still the same today.

In Jiang Yuan's view, forensic botany today is almost as powerful as when DNA was born.

However, because of its difficulty, it cannot be as popular as DNA identification.

But as far as the detection of specific individual cases is concerned, its value is no less than DNA identification.

"At present, it seems that grains are the dominant species. They must have stayed in places with a lot of grains for a long time."

After confirming the species of pollen and sporopollen contained in each sample through a microscope, Jiang Yuan slowly gave a conclusion report.

The original researchers of the Trace Evidence Laboratory sat across from Jiang Yuan in unison, listening to him.

It's like a bunch of tall guys on the court watching good citizens go by and dunk from the free throw line.It doesn't matter what your identity is here, just clap your hands.

While operating the microscope, Jiang Yuan output:

"There are inhaled insects in the radiator, these can be studied separately by someone later."

"The amount of pollen in the tire tread is much smaller than the amount of pollen mixed in the dirt outside the tire."

"There are more types of pollen in the air filter, which can be regrouped later."

"The pollen patterns of the pads and pedals are similar. There are nettles, rice plants, quinoa plants, hawthorns, briars, ivy, birches, pine trees, elms..."

When Jiang Yuan said this, a technician next to him had already unfolded the map and looked at it.

After a while, when Jiang Yuan finished speaking, the technician said: "Team Jiang, in our Luojin City, there are not many places with hawthorn trees, so they should be used as a marker."

Jiang Yuan nodded and said, "Yes."

"Rice is rice, right? There shouldn't be many of these in the city. If it's outside the city, there shouldn't be many with a hawthorn tree or something." Mark it up.

Jiang Yuan actually wanted to say that there is no need to be so troublesome, just find a satellite image that can see the trees on the ground, and just look for it piece by piece.

Pollen maps are not only qualitative, but also quantitative.The place where Jiang Yuan spent the most time just now was counting the amount of pollen.

This step is also very hard for him. He must first identify the species and then count them, and he has to record them in the middle.

However, after completing this step, Jiang Yuan can almost judge the proportion of some plants in the area.

There may be two, three or even ten fields with the above plants, but their proportions and quantities must be different.

Therefore, using the pollen map, it is possible to find the unique location.

This is a very strong part of advanced forensic botany.It is equivalent to the DNA of a place.

Of course, it is also a good thing that someone can help narrow the search.

Jiang Yuan left the laboratory, changed his clothes, and then called Huang Qiangmin, asking him to find the criminal police detachment in Luojin City to collate satellite images.

After finishing the phone call, when he turned around, there was still a row of people behind him, surrounded by a half arc, wrapping around Jiang Yuan's back just like in the laboratory.

Jiang Yuan's vest was cold, if he hadn't suppressed it for a while, he would have learned his wrestling skills from Uncle Ziqiang.

The leading technician laughed and said, "Curiosity."

Brushing the car, looking for pollen, and then determining the location of the kidnapper, this thing sounds easy to make people curious.

The technicians in the trace evidence laboratory still watched Jiang Yuan do it, so they were naturally more curious.

Jiang Yuan didn't care, smiled and said: "Then go and have a look." Then, he led a group of people to the conference room.

……

At this moment.

Xu Tian, ​​the deputy director of the Luojin Municipal Bureau, was leading an office staff to accompany the victim's family to do their work.

The family members of the victim didn't say anything, they just cried.

The parents of the two elementary school students, together with the accompanying grandparents, aunts and uncles, only filled the huge room to the brim.

At the beginning, Xu Tian didn't want so many family members to come, but they couldn't coax the parents of the two families, so they had to ask relatives to intervene.

At the very least, now that relatives are helping to coax them, they won't be helpless.

"Director Xu, tell me, why don't they let him go? They asked for money, and they gave it. What else do they want?" The mother of one of the girls stopped crying, and after saying this, she started Cried.

Xu Tian sighed heavily, and said: "We guess that they may want a sum of money. They may have some use for the first 200 million, and the latter sum should be what they really want."

"Also...we...we..." The mother looked at her husband.

The man's face was livid, he gritted his teeth, and said, "I told the bank, first get a little loan, and sell the house when I get back today!"

The woman's expression suddenly relaxed, and then she took her husband's arm and began to cry.

The man patted her on the shoulder and said: "We didn't have a house back then, as long as Yuan Yuan comes back, we can make money to buy it later."

"En, er..." The woman nodded vigorously, tears soaking her husband's shoulders.

A couple next to each other looked at each other and hugged each other arm in arm.

Xu Tian looked uncomfortable for a while, not only him, but also the policemen present were not in a very good mood.Victims are forced to suffer more and more, but there is nothing they can do.

The kidnappers have already asked for more ransom, which the police cannot pay.If the victim's family members are unwilling to come out, the communication between the two parties may be cut off, and the kidnapping case may turn into a murder case...

However, looking at the actions of several people and feeling their emotions, everyone's mood is twisted.

If good people can only vent their emotions with tears, but bad people can get real money, then what's the point of having the police?
Xu Tian sighed secretly, and persuaded: "Not only our city bureau is paying attention to this case, but the provincial department, ministries and commissions have also sent people here, and experts from all aspects have come to support. You must maintain confidence and optimism. We Well, they are also organizing and coordinating the forces of all parties, trying to find the other party's location and rescue the child..."

It's okay if he doesn't say it, but after saying this, the tears that both parents had just stopped fell again.The old ladies of the two families also began to wipe away tears by their sleeves.

At this time, Huang Qiangmin walked in with a smile on his face.

(End of this chapter)