Jiang Yuan first recorded the several cases Wei Zhenguo mentioned on paper, and then searched them one by one on the computer.
As Wei Zhenguo said, there were a total of three cases. One involved woodland and was a serious arson, but no fingerprints were recorded. Although the other two had fingerprints, one burned a tractor that was about to be scrapped, and the other burned a tractor that was about to be scrapped.
An old, uninhabited house.
The fingerprints found at the scene of the latter two were very ugly, incomplete, and deformed.
Jiang Yuan estimated that the people who conducted the on-site investigation at that time were probably the police from the local police station. They did not consider the problem of excessive fingerprints, so they used powder and tape to stick...
The fingerprints were sent to the Criminal Division Brigade for trace inspection. Regardless of whether they were taken seriously, Jiang Yuan's accurate judgment of the strength of Lao Yan and others showed that they could not handle such fingerprints.
Of course, there’s nothing to blame. Just like most ordinary people can’t get into key universities, key middle schools, or key elementary schools. Their parents are not industry leaders, their families are not from a prestigious family, and they can’t make it in the field on their own.
Even elites don’t have the luck to cheat...
The county bureau's requirements for technical police officers must not be at the level of TV dramas.
Fingerprints that do not reach the level of a major case will not receive the attention of experts.
Cases worth only a few thousand dollars can only receive conventional solutions.
However, if these three cases were involved in the previous greenhouse arson case, it would be different.
"Sit down for a moment." Jiang Yuan returned to the office. Wei Zhenguo also followed.
As a criminal police officer, he is also a busy man, but he still wants to see Jiang Yuan's level - trace inspection is the technical part that ordinary police officers are most familiar with. He can basically check the fingerprints on the fingerprint card on a daily basis.
Do it.
Jiang Yuan sat up straight, ready to take a good look at these fingerprints.
He first downloaded the fingerprints of the tractor burning case, then looked at the image and fell into deep thought.
When Jiang Yuan saw this fingerprint, he felt familiar.
Jiang Yuan had been working on the fingerprints of the greenhouse arson case over and over again for a week. Now when he looked at the newly downloaded fingerprints, the picture emerged in his mind.
The pictures are not exactly the same, but there is a certain degree of similarity. Taking into account factors such as the deformation of fingerprints and exposure to fire and sunlight, Wei Zhenguo said before that it is really possible.
Both have their own shortcomings, and it may be difficult to prove that they are the same fingerprint. Merging the two fingerprints into one fingerprint is also a very difficult operation.
However, compared to the Wenxiang arson case and the tractor burning case, three fingerprints were collected at the fire point, and the completeness was better than that of the Wenxiang case.
Jiang Yuan shook his head, rubbed his fingers again, picked up the mouse, and skillfully dragged the fingerprint into Photoshop.
Adjust color levels, adjust contrast, filter background...
Jiang Yuan is now doing these things as smoothly as selling fish, killing fish, selling abalone, stripping clothes for fun, it's dizzying to watch.
Wei Zhenguo had also seen the fingerprint examiners perform fingerprint matching before. The difficult and hesitant movements made it easy for people to think that the fish seller was selling abalone, the abalone seller was showing off a smile, and the smile seller was killing fish...
"This fingerprint is promising." Jiang Yuan quickly marked 10 feature points and threw them away for automatic matching.
A column of 20 fingerprints was released. Jiang Yuan only looked at a few and then stopped.
He put the two fingerprints on the same screen, tilted his hand to the left, and said slowly: "There is a problem with the direction, but it can basically be determined that they are the same."
"Hey, did you win the competition?" Xiao Wang jumped over to take a look.
"This case of burning the tractor must have been successful." Jiang Yuan took another look and felt much relieved.
The fingerprints from the greenhouse arson case were compared for a long time but failed to match. Jiang Yuan once thought that the corresponding fingerprints were not included in the fingerprint database.
But today's case has torn apart the layers of veil in an instant.
The case in question was the burning of a tractor, but the investigation may be a series of cases.
Wei Zhenguo hissed and came over to take a look, muttering: "So fast..."
He wanted to come over and see how Jiang Yuan made fingerprints, but he didn't expect that in just a moment, he could see Jiang Yuan directly comparing the fingerprints - he also sent the relevant fingerprints to a familiar person in Qinghe City.
I have seen fingerprint inspection, but it is obvious that the city's fingerprint inspection is not easy or easy to compare fingerprints of this level.
"Is there any record of arson?" Wu Jun was also a little curious and wanted to see if this case was really committed by the same person as Wei Zhenguo said.
Jiang Yuan clicked on the detailed information, but shook his head and said: "No. It was the fingerprint collected by the local police station when he reported the loss of his ID card. Later, this fingerprint was used to catch him stealing..."
Every police station has the task of collecting fingerprints, which is also reflected in the specific matters in the "combat strength rankings" of the police stations and county bureaus. When necessary, no matter what business you come here to do, your fingerprints will be collected first.
Say it again.
Wei Zhenguo nodded lightly, took out his mobile phone, and sent a message while saying: "I'm going to meet this... Forensic Doctor Jiang, thank you for your hard work."
He is an old detective. He can just say hello to the captain of his team and bring two people with him to the battle.
As he spoke, Wei Zhenguo walked to the door, waved his hand, and quickly went out.
Wang Zhong watched Wei Zhenguo leave, and his expression suddenly turned serious: "Jiang Yuan, Captain Wei seems to like you quite a lot."
Jiang Yuan: "How can you tell?"
"Captain Wei is glaring at others."
"in this way……"
"Captain Wei can handle this guy." Wang Zhong sighed and said, "Jiang Yuan, seize the opportunity."
"What's the point?" Jiang Yuan looked at Wang Zhong confused.
Wang Zhong sighed deeply again: "Captain Wei...Captain Wei's daughter is so beautiful."
