Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 194 Breaking the Record

Comparison failed!

Still a comparison failure.

The four bright red characters on the screen seemed to be silently mocking Lu Chuan's hard work 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.

Segmenting fingerprints has very high requirements on the criminal police's ability to identify and analyze fingerprints, especially when Lu Chuan divides a fingerprint into four parts, which requires Lu Chuan to have an overall analysis idea for each part of the fingerprint.

Whenever any one of these parts is processed, the fingerprints of the other three parts are contacted.

Generally speaking, when more experienced trace inspection uses the split fingerprint method to identify and analyze fingerprints, it is divided into two parts.

In this way, 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 of analysis.

As a result, the comparison still failed.

Pulling out the fingerprints, Lu Chuan also put aside the fingerprints after the previous preprocessing.

The same fingerprint, after two different identification and analysis methods, the final result...

Basically the same.

Two completely different methods end up with the same fingerprint, but the system comparison still fails.

This means that it is more likely that the owner of the fingerprint is in the system and did not leave a sample.

Scratching his head, Lu Chuan sighed.

That's the job, especially fingerprint analysis.

In the past six months, Lu Chuan has identified at least a few thousand fingerprints.

Some of these fingerprints are very difficult to identify, while others are very difficult to identify.

However, fingerprint identification analysis is not only related to the difficulty of fingerprint preprocessing 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 Lu Chuan's fingerprints identified in the fingerprint battle organized by the Haizhou 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 library, and there will be no results if we continue.

Looking at the time, it was already past nine o'clock in the evening.

In the conference room, most people are still fighting.

"Are you working overtime today?"

Zhao Zhigao, who was beside Lu Chuan, patted Lu Chuan on the shoulder: "The fingerprint just now didn't work?"

Zhao Zhigao was sitting next to Lu Chuan, and he knew exactly what Lu Chuan was doing with his fingerprints.

Lu Chuan nodded helplessly: "Two different methods were used, but the comparison still failed."

"Often things, let's go and have a rest first."

Lu Chuan nodded, and the two walked out of the meeting room: "I will get another fingerprint later, and I will rest today."

"Okay, I'll get another one and go back."

The two smoked two cigarettes and chatted about the City Criminal Investigation Detachment.

"If the other party doesn't say anything, the case is not easy to handle."

Although the murderer of the taxi driver murder serial case was arrested, the interrogation of the other party did not go well.

"Didn't you find a psychologist?"

Although Lu Chuan has never done pre-trial and has no experience in this field, he has heard of it.

The murderers of most serial cases have different psychology from ordinary people.

This kind of person cannot be speculated or understood with ordinary people's principles.

When Lu Chuan was in college, he heard some cases explained by his teacher. Sometimes, dealing with such criminal suspects required the participation of psychologists.

"I heard that a psychologist has already passed by. Let's see what's going on tonight."

Back in the meeting room, most of the experts are still there.

Lu Chuan clicked on the newly updated hero list on the computer screen, and his ranking has dropped from the first to the second.

Tian Rong won another fingerprint, worth six points.

Adding the original 24 points, the total is [-] points, so he became the number one hero list with a score higher than Lu Chuan's by [-] points.

The number of cases in Belgium has also changed from four to five.

Lu Chuan's grades remained unchanged, two cases with [-] points.

After closing the hero list casually, Lu Chuan opened the fingerprint battle library and provoked the case. He was still aiming at the murder case!
This time, Lu Chuan chose a fingerprint with a muddy background.

Lu Chuan roughly glanced at the basic situation of the case, a case of Meishan Mine ten years ago.

Meishan is the largest coal mining base in the province. It has been developed 50 years ago and still has a large coal production.

Ten years ago, workers who went down the mine found a worker who had been missing for three days in a mine.

At that time, the police handling the case found the murder weapon that killed the workers in the ruins deep in the mine, and collected half of the fingerprints from it.

Compared with the narrow fingerprint processed by Lu Chuan in the afternoon, it is impossible to preprocess this fingerprint purely by visual analysis.

The familiar keyboard sound sounded again, and the people around looked up and didn't care.

Lu Chuan had been typing on the keyboard all morning, and the regular clicking sound was a bit noisy at first, but he got used to it after listening.

What's more, it was this rattling sound that was involved in two murders.

In the afternoon, there was suddenly no sound from Lu Chuan's side, and everyone was still getting used to it.

Blurred fingerprints require mathematical methods to process and analyze.

The first is image layering, then image enhancement, and finally sharpening, denoising and other operations.

More than an hour later, at nearly eleven o'clock, the preprocessing results of the pasted fingerprints were finally completed.

Stretching, Lu Chuan pulled the processed fingerprint into the fingerprint comparison system.

Zhao Zhigao also finished processing a fingerprint.

The result is a pity, and it is normal, and the comparison was not successful.

"Analyzed another one?"

Pulling out a cigarette and handing it to Lu Chuan, Zhao Zhigao smiled: "It's okay, I got seven or eight fingerprints today, so I just got one. What we just did is better..."

Ding!
As a result, Zhao Zhigao hadn't finished speaking when the prompt sounded that the fingerprint comparison was completed.

"The comparison was successful!"

The four large characters shone like the sun on the screen.

"Success...?"

Zhao Zhigao knew that Lu Chuan's murders were all murders.

Murder!

That was murder!
The slogan and requirement that murder cases must be solved are not put forward now.

Ten years ago, that was what was required 20 years ago.

A province is so large, with a population of nearly [-] million, more than a dozen urban areas, and more than [-] counties. How many cases and homicides will occur in a year?
In each district and county alone, there may be only one or two homicides a year, but if you look at it at the level of the whole province, there are hundreds of homicides in that year.

With so many cases, after so many years, there are only 83 homicide cases that can be included in the fingerprint battle database.

It can be seen how many people have studied these cases.

However, since the case has not been solved, one can know how difficult it is to solve the case.

And Lu Chuan, in one day, had three murders in a row!

(End of this chapter)