Chapter 533: Finding a Different Way

The criminal police detachment of Luojin City does not have its own vehicle inspection department. Similar to Changyang City, they also put the suspect's abandoned car in the vehicle inspection center of the traffic police detachment.

So everyone took a car to the place. Jiang Yuan sat in the back seat and scanned all kinds of physical evidence involved in the case, such as fingerprints, footprints, DNA, etc., and also looked at the information provided by technical investigation.

LV5 fingerprint and footprint identification, look at these photos quickly. Jiang Yuan does not need to deal with it, just check it a little and you can turn it over.

For Jiang Yuan, who is used to backlog cases, this current kidnapping case provides too many clues.

If he is given enough time and sufficient investigation resources, Jiang Yuan may be able to identify the criminals and other information from several directions.

However, in the current situation, the identity of the criminals is actually known, and it is not important. What is important is where they are hiding now and where they will go.

Showing the relationship between people and places is the scope of forensic botany, and it is one of the reasons why Jiang Yuan chose this case.

Huang Qiangmin and others were probably still confused at this time. There were too few people in China who mastered this technology. Normal people probably didn't think about it.

Traffic Police Detachment Vehicle Inspection Center.

In a large indoor parking space, there was the JAC pickup truck that we saw this time.

The car itself was a bit tattered, which concentrated on the image of a poor but still working hard.

Looking at the battle-damaged interior of the car and the mess in the back of the car, Jiang Yuan understood that it was not stolen, but one of the reasons for the police.

"Have fingerprints and DNA been taken?" Jiang Yuan asked a few meters away from the car.

"Almost, anyway, someone has already brushed it with a brush. A lot of photos have been taken." In the administrator's understanding, a car that has been fingerprinted and DNA taken is considered to have been fully inspected.

In fact, it is not wrong. A normal and complete vehicle has basically been inspected after this.

When Jiang Yuan heard this, his slightly worried mood disappeared.

He was most afraid that trace evidence had already been collected, and then he could only look at the results compiled by others. For him, a VL3 novice in forensic botany, it was a bit troublesome.

However, if it was just to collect fingerprints and DNA, normal people would not wipe the whole car, but would only use an investigation light to shine once, and then go forward to collect evidence when fingerprints and footprints were seen.

For the collection of trace evidence or forensic botany, this level of preparation is nothing.

"Bring our tools."

Jiang Yuan asked for a brush and began to brush the particles from all parts of the car.

From the chassis and tires, to the floor mats, bumpers, air filters, radiators...

Huang Qiangmin, Mu Zhiyang and others stood in front, and some of them could not keep up with Jiang Yuan's pace.

While Huang Qiangmin was talking with the leaders of the Luojin City Criminal Police Detachment, he asked Jiang Yuan: "Are we looking for trace evidence? Don't you usually do it later?"

In his impression, Jiang Yuan usually tried to find trace evidence when he couldn't find other evidence.

Trace evidence is just as its name suggests, the quantity is small, and the amount of information it can provide is definitely not as much as normal evidence. In addition, trace evidence is very expensive, so it should be considered later.

But this time, Jiang Yuan wanted to find pollen and spores, so he said: "Luojin City should have found all the evidence that can be found, so I want to find another way and try another plan. Should it be okay?"

Jiang Yuan used a little emotional intelligence and asked Ge Zhengwei of the Luojin City Criminal Police Detachment next to him with a smile.

He usually doesn't bother to use this thing. He doesn't expect to be promoted or get a raise, and there is Huang Qiangmin protecting him in front. If he uses emotional intelligence day by day, it will be a waste.

This time is a little different. It's a change of province, which is still different from Shannan Province. Cui Xiaohu looks young, so in this case, he has to use a little emotional intelligence.

Of course, Huang Qiangmin took all these into consideration, and emotional intelligence is also charged, so it is not wasted.

Political Commissar Ge didn't know that every gift from fate has a price tag, and some are particularly expensive.

He also smiled slightly because Jiang Yuan said to find a new way.

If someone finds evidence in the things he has found, it would be embarrassing. Even if Comrade Jiang Yuan, a famous expert hired by the ministry, found the evidence, it would still be embarrassing.

However, if Jiang Yuan found a new way to solve the case, it would feel much better. It's not that we didn't do well enough, but that we took the wrong path and had bad luck.

Political Commissar Ge chuckled: "As expected of Jiang Yuan, the expert, the initial strategy is different. Well, this is the best. Everyone should work together to find a way to solve the case..."

Huang Qiangmin smiled but said nothing. Jiang Yuan had never shown such a thing as working together before.

When Political Commissar Ge mentioned the case, he continued, "The kidnappers this time were extremely arrogant. We suspect that they must have made sufficient preparations for a long time beforehand, otherwise, they would not be able to avoid such an intense search. The three of them even wanted to make a big fuss on purpose, kidnapping the child in front of other parents..."

"Do they want you to pay the ransom quickly?" Huang Qiangmin was very clear about the social impact of the case.

If it was a secret kidnapping case, the police would have enough time to negotiate with the kidnappers and would not easily choose to pay the ransom.

However, if it is a kidnapping case with a large impact but not a particularly large one, in order to quickly eliminate the impact, solve the case, and especially rescue the hostages, the superiors may pressure the police to pay the ransom quickly.

The balance here requires at least a LV1 kidnapper theory.

Political Commissar Ge knew what Huang Qiangmin meant, nodded solemnly, and said: "It is indeed very likely. We speculate that they should want to get the money and go abroad directly. At the beginning, they even wanted Bitcoin. We said it was illegal, so we didn't pay it out after all the persuasion..."

"2 million in cash is also a big bag. Can they take it out?"

The three of them were all clear, so it was naturally impossible to deposit cash into the card. In fact, in the current bank, if you want to deposit an additional 500,000, you have to ask the color of the dog that Gaozu saw when he was 18 years old, not to mention that the number of the money must be recorded.

Political Commissar Ge's face darkened, and he continued, "We have several guesses in this regard. One is that they can hide the money and find someone to take it out later. Another is that they may have a planned route, such as smuggling out from the sea."

The most famous place in Baijiang Province is Baijiang. You can go out to sea by taking a small boat from Baijiang, and then change to other fishing boats on the sea. Going abroad is not as difficult as imagined. This process mainly costs money. A small boat with a little speed costs hundreds of thousands. The money for the fishing boat must be at least hundreds of thousands before someone is willing to take the risk with you.

And normal smugglers cannot afford such a large sum of money.

"What about the victim? Can we confirm whether he is alive or dead?" Huang Qiangmin asked again.

"It was possible yesterday, but I haven't called today yet." Political Commissar Ge paused and said, "We always verify the child's physical condition, but the danger also exists."

...

Jiang Yuan did not participate in the conversation between the two, and concentrated on studying the car.

The car body was covered with pollen and spores.

In the natural environment, the pollen of wind-pollinated plants can drift hundreds of meters away. Think about the season when willow and poplar catkins are abundant. It is only because willow and poplar trees are too open that they attract people's complaints.

In different time periods, pine, cypress, mulberry and wormwood are the main forces in spreading pollen. It is normal for pollen to float a hundred meters.

The most important thing is that as a proof of location, the types and proportions of pollen and spores in each area are different.

In simple terms, the pollen map obtained by the murderer standing in front of a garden gate and standing one meter away are completely different.

Of course, to make this level of pollen map, LV3 forensic botany is required.

"Do you have a centrifuge?" Jiang Yuan wiped and washed first, and classified the washed sludge and put it aside for subsequent use of the centrifuge.

"There is one in the trace evidence laboratory." said Ge Zhengwei.

"Then trouble them to process it." Jiang Yuan directly outsourced the primary task.

Luojin City is the capital of Baijiang Province. It has good economic conditions and the newly built trace evidence laboratory has three or four years of experience. Compared with ordinary physical and chemical laboratories, etc., the technical content of trace evidence laboratories is much higher, and sifting some silt should not be a problem.

Jiang Yuan asked for various strong acids and prepared to use them to deal with samples taken from other places.

Strong acids are used to nitrate the background in the samples, such as sand, clay, fiber, lignin, humic acid, etc.

It sounds a bit incredible, but in fact, when all the above things are corroded by strong acids, spores and pollen will still be there.

Spores, pollen grains, insects, fungal residues, and the shells of crustaceans all have a special polymer layer that can resist strong acids that quartz, clay and other substances cannot resist. This polymer is called sporopollenin in plants and chitin in insects and fungi.

After this step, even including this step, it is best to do it in the laboratory.

This is not only because it is dangerous to use strong acids, but also because a clean laboratory is needed in the end to protect it from pollution.

There are also spores and pollen floating in the air in the urban space.

Jiang Yuan spent almost the entire day in the laboratory and in front of the microscope.

The white-shirted officers of the Luojin City Criminal Police Brigade were looking forward to Jiang Yuan, but they also didn't understand him.

Cui Xiaohu didn't understand him either, but he had to comfort the criminal police of Luojin City and explain to the leaders of the ministries and commissions who were concerned about the case...

After the whole process, Cui Xiaohu felt that he was more tired than the kidnappers.

Huang Qiangmin patted Cui Xiaohu on the shoulder with understanding, which was not easy.