Chapter 194 Record-breaking
Comparison failed!
The comparison still failed.
The four bright red characters on the screen seemed to be silently mocking Lu Chuan’s efforts all afternoon.
For the second fingerprint identification analysis, Lu Chuan adopted a different approach.
Segmentation distinguishes the entire fingerprint, which is a rare processing method.
Fingerprint splitting requires a very high level of fingerprint identification and analysis ability of the criminal police, especially when Lu Chuan divided a fingerprint into four parts, which required Lu Chuan to have an overall analysis idea for each part of the fingerprint. .
When dealing with any one of the parts, the fingerprints of the other three parts must be contacted.
Generally speaking, when more experienced fingerprint examiners use the split fingerprint method to identify and analyze fingerprints, they divide it into two parts.
Relatively speaking, the difficulty of processing is relatively low.
It is very rare to be divided into four parts like Lu Chuan.
However, even so, Lu Chuan, who has advanced fingerprint identification and analysis skills, is still confident that he can do a good job in analysis.
As a result, the comparison still failed.
Pull out the fingerprints, and Lu Chuan also puts aside the fingerprints that were preprocessed last time.
The same fingerprint, after two different identification and analysis methods, the final result is...
Basically the same.
Two completely different methods, the final fingerprints are the same, but the system comparison still fails.
This means that it is more likely that the owner of the fingerprint is in the system and has not left a sample.
Scratching his head, Lu Chuan sighed.
That’s how it works, especially fingerprint identification analysis.
Over the past six months, Lu Chuan has identified thousands of fingerprints at least.
Some of these fingerprints are very difficult to identify, and some are very difficult to identify.
However, fingerprint identification analysis is not only related to the difficulty of fingerprint pre-processing analysis.
In some cases, the fingerprints are very clear, but there is no sample of the target suspect in the system, so the comparison still cannot be made.
Just like the fingerprints identified by Lu Chuan in the fingerprint battle organized by the Haizhou City Public Security Bureau, the suspect's fingerprint samples were not entered in the system, and it was useless for anyone to identify them.
Rubbing his sore eyes, Lu Chuan decided to give up the fingerprint.
There is no way, there is no fingerprint sample of the suspect in the fingerprint database, and if we continue, there will be no results.
Looking at the time, it was already past nine o'clock in the evening.
In the conference room, most people are still fighting hard.
“Are you working overtime today?”
Zhao Zhigao, who was beside Lu Chuan, patted Lu Chuan on the shoulder: "The fingerprint just now was not successful?"
Zhao Zhigao was sitting next to Lu Chuan and knew very well what fingerprint Lu Chuan was doing.
Lu Chuan nodded helplessly: "I used two different methods, but still no comparison was successful."
"It's a common thing, let's go and take a rest first."
Lu Chuan nodded, and the two of them walked out of the conference room: "I'll get another fingerprint later, and I'll have a rest today."
"Okay, I'll get one more and go back."
The two smoked two cigarettes and chatted about the Chazhou City Criminal Investigation Detachment.
"The other party didn't say anything, and the case is not easy to handle."
Although the murderer of the taxi driver's serial murder case was caught, the other party's interrogation was not smooth.
“Didn’t you find a psychologist?”
Although Lu Chuan had never done a preliminary trial and had no experience in this area, he had heard of it.
Most of the serial murderers have a psychology that is different from ordinary people.
This kind of person cannot be understood by ordinary people. When Lu Chuan was in college, he heard some cases explained by his teacher. Sometimes, dealing with such criminal suspects required the participation of psychological experts.
“I heard that a psychologist has gone over to see what happens tonight.”
Returning to the conference room, most of the experts are still there.
Lu Chuan clicked on the hero list that had just been updated on the computer screen. His ranking had dropped from first to second.
Tian Rong won another fingerprint, worth six points.
Including the original eighteen points, the total is twenty-four points. With a score of four points higher than Lu Chuan, he became the first in the hero list.
The number of cases in the comparison also increased from four to five.
Lu Chuan's score remained unchanged, with two cases and twenty points.
Close the hero list, Lu Chuan opened the fingerprint database and provoked a case. He was still targeting the murder case!
This time, Lu Chuan chose a muddy fingerprint.
Lu Chuan glanced at the basic situation of the case and saw a case in Meishan Mine ten years ago.
Meishan is the largest coal mine base in the province. It was developed fifty years ago and still has a large coal output.
Ten years ago, workers who went down found a co-worker who had been missing for three days in a mine.
The police investigating the case at that time found the murder weapon that killed the worker in the ruins deep in the mine, and collected half of the fingerprints from it.
Compared with the narrow fingerprints that Lu Chuan processed in the afternoon, it is impossible to preprocess this fingerprint purely by relying on visual analysis.
The familiar keyboard sound sounded again. People around looked up and didn't care.
Lu Chuan had been typing on the keyboard all morning. The regular clicking sounds felt a bit noisy at first, but he got used to it as he listened.
What's more, just this clicking sound caused two murders.
In the afternoon, there was suddenly no sound from Lu Chuan's side, and everyone was still a little used to it.
Fingerprints with muddy backgrounds require mathematical methods to process and analyze.
First is image layering, then image enhancement, and finally sharpening, noise removal and other operations.
More than an hour later, at nearly eleven o'clock, the preprocessing results of the muddy fingerprints were finally completed.
Stretching, Lu Chuan pulled the processed fingerprints into the fingerprint comparison system.
Zhao Zhigao also finished processing a fingerprint.
The result is a pity and normal, and the comparison was not successful.
"Another one was analyzed?"
Pull out a cigarette and hand it to Lu Chuan. Zhao Zhigao smiled: "It's okay. I got seven or eight fingerprints today, isn't it? I’ve got one done, and it’s no match for us tough guys...”
bite!
As a result, before Zhao Zhigao finished speaking, the prompt that the fingerprint comparison was completed sounded.
"Comparison successful!"
Four big characters, shining like the sun on the screen.
“Is it done?”
Zhao Zhigao knew that Lu Chuan committed murder cases.
Homicide!
That was a murder case!
The slogan and demand that the murder case must be solved are not put forward now.
This is what was requested ten years ago, twenty years ago.
A province is as big as a province, with a population of nearly 100 million, more than a dozen urban areas, and more than fifty counties. How many cases will occur in a year, and how many murders will there be in a year?
If you look at each district or county individually, there may only be one or two murders a year, but if you look at it at the provincial level, there are hundreds of murders a year.
With so many cases, after so many years, the backlog of murder cases that can be entered into the fingerprint database is only eighty-three.
It can be seen that these cases have been studied by many people.
However, since the case has never been solved, we can know how difficult it is to solve the case.
As for Lu Chuan, he was involved in three murders in a row in one day!
(End of this chapter)