The system reward for Song Kun's murder case has finally arrived.

To Lu Chuan's surprise, the system was upgraded.

In the past, the mode of passively accepting system rewards has now become a mode in which Lu Chuan can choose the rewards independently.

The virtual picture in my mind also became vivid.

A window that could move up and down with Lu Chuan's thoughts opened.

"Criminal Investigation Technology: Junior and Advanced Criminal Psychology, Junior and Advanced Investigation and Interrogation Techniques, Junior and Advanced Criminal Imaging Techniques......"

"Security technology: junior and senior network security technology, junior and senior security engineering design, junior and senior security system maintenance ......"

"Forensic Techniques: Junior and Senior Criminal Photography, Junior and Senior Trace Identification, Junior and Senior Document Identification, ......"

The entire list includes all professions related to criminal investigation.

Within each major, there are several or more than a dozen subdivision skills.

After a cursory look, there are probably hundreds of skills.

Among all the skills, Lu Chuan's existing skills are marked in red, the optional skills are marked in blue, and the non-optional advanced skills are marked in gray.

This system upgrade made Lu Chuan feel like he was choosing a major again after the college entrance examination.

Under the teaching system of the Public Security University, the classification of major majors in the system is actually different colleges and departments.

The skills in it are different professional directions.

In addition to this, there are branches of forensic science.

"Forensic clinical science: junior and senior level injury degree identification, junior high and high level disability degree identification, etc."

"Forensic anthropology: identification and analysis of skeletal at the junior and senior levels, reconstruction of the skull at the junior and senior levels, etc."

There are also all branches of forensic psychiatry, forensic toxicology, forensic pathology, forensic entomology, etc.

In addition to these, there are many other kinds of skills.

For example, the ability to improve combat effectiveness such as shooting and fighting.

It is also divided into junior high and high level.

"Ask the host to select the type of reward."

"1. An intermediate skill card."

"2. An intermediate skill upgrade card."

Do you choose an intermediate reward directly, or upgrade an intermediate skill to a higher level?

Lu Chuan didn't even think about it, there was not much kung fu in the refinement.

After the system is upgraded, the rewards provided are dazzling, Lu Chuan is to solve one case a day, and it is estimated that it will be very difficult to learn all of them in his lifetime.

Moreover, since crossing the system, Lu Chuan has participated in more than a dozen large and small cases.

There were four or five homicides, but the rewards were all beginner and intermediate skills.

It can be seen that the difficulty of acquiring advanced skills is relatively large.

This time, there was an opportunity to upgrade an intermediate skill to an advanced skill, and Lu Chuan would not miss it.

"System, select the Intermediate Skill Enhancement Card."

"The Intermediate Skill Enhancement Card has been selected, please select the skill that needs to be improved."

"1. Intermediate fingerprint collection skills, 2. Intermediate bone identification and analysis skills, 3. Intermediate fingerprint identification and analysis skills."

These are the three intermediate skills that Lu Chuan has mastered now, and Lu Chuan can only choose one of these three skills to upgrade.

This time, Lu Chuan did not hesitate at all, and directly clicked on the intermediate fingerprint identification analysis.

"Upgrade your intermediate fingerprint identification and analysis skills...... Please wait. ”

Brush!

The system prompt fell, and the knowledge and skills about fingerprint identification and analysis poured into the depths of Lu Chuan's mind like a tidal wave.

The ability of intermediate fingerprint identification and analysis made Lu Chuan make a major discovery in the case of the girl's skin in Mai Langzhong.

The fingerprints collected on the deceased's skin completely locked the suspect.

This time, the intermediate skill was upgraded to the advanced level, which gave Lu Chuan a sense of qualitative change.

Regarding the skills and methods of fingerprint identification and analysis, there was no trace of concealment in front of Lu Chuan's eyes.

Fingerprint identification and analysis is not only a systematic profession, but also a profession with great differences in personality improvement.

Theoretical knowledge and practical experience are the key to improving the ability of fingerprint identification and analysis.

The results analyzed by different fingerprint identification experts are also different.

The criminal police brigade of the high-tech zone, the fingerprint identification of the guest appearance by the front-line investigating criminal police, should be the lowest.

It can only be said that the fingerprints collected are roughly identified and compared, and it is difficult to identify and analyze the fingerprints that are slightly deformed or blurred or missing under pressure.

At a higher level, Yang Sen and Lao Bai have some talent and rich experience.

The on-site survey and part-time trace inspection can continue to analyze and adjust some defective, deformed, and blurred fingerprints, and then carry out identification.

The success rate is generally not bad, but for some fingerprints that are seriously missing, seriously deformed, and blurred, you can only try your luck.

At a higher level, Liu Guodong is the kind of person who can barely participate in the fingerprint battle organized by the provincial department, of course, he is at the bottom of the grades, and he can only win one fingerprint at a time, or the existence of zero fingerprints.

In Liu Guodong's own words, he is enriching the expert pool.

There are more than a dozen criminal investigation detachments in the province, and each detachment must have one that can be taken out.

It's like a novel website filling a library, those who go in may not be good, but those who can't get in will definitely not work.

A more advanced trace inspection can be called a fingerprint identification expert, at least in the province.

For example, in the trace inspection of the Tianzhou City Criminal Investigation Detachment, people are professional, not part-time, and the work content is only one item, fingerprint identification.

It is basically in the forefront of the province, and every fingerprint battle, at least two or three successful results are compared.

There are even more advanced ones, which are several experts from the provincial department, which are the existence of the strength to participate in the national fingerprint battle organized by the ministry and commission.

The combat effectiveness can be described as explosive.

As for how to explode the table, Lu Chuan didn't know before, but now after receiving the advanced fingerprint identification and analysis skills, he understands it.

Normally, fingerprint identification and analysis refers to the identification and comparison of fingerprints.

Give you a fingerprint, preprocess the fingerprint accordingly, mark the feature points, calculate the data, and then compare it within the system.

The specific methods are various identification methods extended by the classification of ten-finger fingerprints, such as Qingdao-style single-finger fingerprint analysis and Chongqing-style single-finger fingerprint analysis.

Advanced fingerprint analysis includes not only single-finger fingerprint analysis methods, but also multi-finger fingerprint analysis methods.

In addition to this, there is some analysis of the owner himself through fingerprints.

For example, fingerprints can be used to determine the age, living habits, physical state, living area and other information of the fingerprint owner.

These are all things that Lu Chuan had only heard of before, but had never seen.

In advanced fingerprint analysis, these judgments and verification analyses have detailed operation methods.

For example, judging age, the palm area of a person is also small when he is young, and the fingerprint line is also thin.

By the thickness and density of the lines, you can tell whether the person is a child or an adult.

After comparing the data, you can find the approximate age range.