Chapter 30

Jiang Yuan recorded the several cases Wei Zhengguo mentioned on paper first, and then searched for them one by one on the computer.

Just as Wei Zhengguo said, there were 3 cases in total. One involved woodland and was a proper arson, but no fingerprints were recorded. Although fingerprints were recorded in the other two, one was a tractor that was almost scrapped, and the other was an old house where no one lived.

The fingerprints found at the scene of the latter two were very poor, not to mention incomplete, but also deformed.

Jiang Yuan estimated that the person who conducted the scene investigation at that time might have been a police officer from the local police station, who did not consider the problem of fingerprints being burned by fire, so he just brushed it with powder and stuck it with tape...

When the fingerprints were sent to the trace inspection department of the Criminal Science Brigade, not to mention whether they were valued, just based on Jiang Yuan's accurate judgment of the strength of Old Yan and others, they could not handle such fingerprints either.

Of course, there is nothing to blame for this. Just like most ordinary people cannot get into key universities, cannot get into key middle schools, cannot get into key primary schools, their parents are not industry leaders, their families are not famous families, they cannot become elites in their fields, and they don't have the luck to lie down and have a cheat...

The requirements of the county bureau for technical police officers certainly cannot be at the level of a TV series.

Fingerprints that do not reach the level of major cases will not get the attention of experts and big shots.

For cases with a value of only a few thousand yuan, only conventional treatment plans can be obtained.

However, if these 3 cases could be linked to the previous greenhouse arson case, it would be different.

"Please sit for a moment." Jiang Yuan returned to the office. Wei Zhengguo also followed.

As a criminal police officer, he is also a very busy person, but he still wants to see Jiang Yuan's level—trace inspection is the technical part that ordinary police officers are most familiar with. Daily checking of fingerprints on fingerprint cards and the like can basically be done.

Jiang Yuan sat up straight, ready to take a good look at these fingerprints.

He first downloaded the fingerprints of the tractor burning case, stared at the image, and fell into deep thought.

When this fingerprint entered his eyes, it gave Jiang Yuan a familiar feeling.

Jiang Yuan had been working on the greenhouse arson case fingerprints for a week. Now that he saw this newly downloaded fingerprint, the image had already emerged in his mind.

The images are not quite the same, but there is a certain degree of similarity. Considering factors such as fingerprint deformation and fire and sun exposure, what Wei Zhengguo said earlier is really possible.

Both have their own incompleteness. It might be very difficult to prove that they are the same fingerprint, and merging two fingerprints into one is also a very difficult operation.

However, compared to the Wenxiang arson case, the tractor burning case collected 3 fingerprints at the ignition point, and the completeness was stronger than that of the Wenxiang case.

Jiang Yuan shook his head, rubbed his fingers, picked up the mouse, and skillfully dragged the fingerprints into Photoshop.

Adjusting levels, adjusting contrast, filtering the background...

Jiang Yuan is now doing these things as smoothly as a fishmonger killing fish, a seller of abalone shelling, a seller of smiles taking off clothes, which is dazzling.

Wei Zhengguo had also seen trace inspectors doing fingerprint matching before. Those difficult and hesitant movements easily make people think that the fishmonger is selling abalone, the abalone seller is selling smiles, and the smile seller is killing fish...

"This fingerprint has hope." Jiang Yuan quickly marked 10 feature points and threw them for automatic matching.

A row of 20 fingerprints was released. Jiang Yuan only looked at a few and stopped.

He put the two fingerprints on the same screen, made a tilting gesture to the left with his hand, and said slowly: "The direction is a bit problematic, but it can basically be determined to be the same."

"Eh, matched?" Little Wang jumped over to look first.

"This tractor burning case should be a match." Jiang Yuan looked again, and his heart instantly felt much more relaxed.

The greenhouse arson case fingerprints had been compared for a long time, but they could not be matched. Jiang Yuan even once thought that the corresponding fingerprints were not included in the fingerprint database.

But today's case instantly tore through the layers of veils in the middle.

The match was the tractor burning case, but what was solved might be a series of cases.

Wei Zhengguo made a "hiss" sound, also leaned over to look, and muttered: "So fast..."

He wanted to come over to see how Jiang Yuan did fingerprints, but he didn't expect that in such a short time, he could see Jiang Yuan directly match the fingerprints—he had also asked trace inspectors he was familiar with in Qinghe City to look at the relevant fingerprints, but obviously, the trace inspectors in the city, comparing fingerprints of this level, were at least not relaxed or easy.

"Does he have a criminal record for arson?" Wu Jun was also a bit curious and wanted to see if this case was really committed by the same person as Wei Zhengguo said.

Jiang Yuan clicked on the detailed information, but shook his head and said: "No. It was the fingerprint collected when the local police station handled the loss of his ID card. Later, using this fingerprint, he was caught for theft..."

Every police station has a fingerprint collection task, which is also a specific item reflected in the "combat power ranking" of the police station and the county bureau. When needed, no matter what business you come here for, they will collect your fingerprints first.

Wei Zhengguo nodded slightly, took out his phone, and while sending a message, said: "I'll go meet this person... Forensic Doctor Jiang, thank you for your hard work."

He is an old criminal police officer. He can greet the captain of his own team and take two people to go into battle.

As he spoke, Wei Zhengguo had walked to the door, waved his hand, and quickly went out.

Wang Zhong watched Wei Zhengguo leave, his expression suddenly becoming deep: "Jiang Yuan, Captain Wei seems to like you very much."

Jiang Yuan: "How can you tell?"

"Captain Wei glares at others."

"Like this..."

"Captain Wei is a person you can get along with." Wang Zhong sighed and said: "Jiang Yuan, you should seize the opportunity."

"What's the implication?" Jiang Yuan looked at Wang Zhong, not understanding.

Wang Zhong sighed deeply again: "Captain Wei... Captain Wei's daughter is very beautiful."