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

Chapter 350 Suddenly got busy
Surveying the office now.

Lu Chuan's fingerprint comparison work has also entered a critical moment.

It is very difficult to extract fingerprints from rebar. The grassroots police involved in the investigation of the case were not particularly skilled at that time, which led to some problems in the extraction of fingerprints.

Lu Chuan's processing of fingerprints this time not only improved the clarity, but also completed the fingerprints.

Because of the special structure of the rebar, the murderer only left fingerprints on the raised parts of the rebar and no fingerprints on the recessed parts.

Completing the fingerprints is to connect the ridges one by one. This workload is still very heavy. It took Lu Chuan more than three hours to basically complete it.

Being so focused and spending so much energy on dealing with a fingerprint, Lu Chuan would only waste so much time when facing a murder case.

This means that the environment is special, no one interferes, and Lu Chuan concentrates on working in the underground laboratory alone.

It would probably be very difficult to get a fingerprint in the field survey office above with such meticulousness and concentration.

In the system, fingerprint comparison is in progress.

Because the fingerprints were too fragmented, Lu Chuan did not use a complete comparison method this time.

Instead, the similarity comparison method is adopted, and the fingerprint system will list the fingerprints with the most identical feature points according to the feature points of the target fingerprint.

Then Lu Chuan manually analyzed and compared the fingerprints one by one.

This kind of manual analysis and comparison actually uses the uniqueness of feature points to eliminate them.

The target fingerprints in the system are not all relatively complete. The fingerprints in the fingerprint library can actually be divided into two categories from the identity information.

One is identity information confirmation, which is the basic information of everyone who knows the fingerprint.

Most of these fingerprints are collected through two channels. On the one hand, they are formal channels, where the police at the police station collect fingerprints, or when former criminals collect fingerprints after being arrested.

The other is that the identity information of the fingerprint owner is not confirmed. There are only fingerprints in the system, but the relevant identity information is blank.

This is basically a possibility that a crime was committed and fingerprints were left on the scene, but the fingerprint information was not entered into the fingerprint system through formal channels.

In this case, it's just sitting on the sidelines.

Maybe one day you can scan the other person's fingerprints, successfully match and catch the other person.

Another use is to handle cases together. Criminals rarely commit crimes only once.

For example, the uncle who was looking for a young lady to play with at the entrance of the alley, how could he only go there once?
This is true for uncles, and so is it for little sisters.

The same goes for criminal suspects.

Because of human nature.

The elimination of unique fingerprints is relatively fast.

The first wave of twenty fingerprints given by the system, Lu Chuan quickly eliminated all of them.

Turn the page and enter the next interface, which is another twenty fingerprints.

The similar fingerprints given by the system are actually sorted, and the similarity is sorted from high to low.

But it does not mean that if the similarity is high, the fingerprints will definitely match.

If the similarity is low, it cannot be compared.

Lu Chuan rarely uses this method, but compared to the complete comparison method, similarity comparison is the method used by many detectives currently investigating.

After all, this method has lower requirements for fingerprint preprocessing.

Of the three fingerprints No. 20, Lu Chuan spent the longest time observing. "There is no special point...it's just you!"

The similar fingerprints given by the system are actually not very different. There is a certain probability that the fingerprint ranked first and the 30th and 40th fingerprint are similar to the original fingerprint.

Sun Tao, male, 32 years old, a native of Haizhou, has been imprisoned for many crimes including fighting, theft, and robbery.

This is the owner information of the three fingerprints of No.20.

Lu Chuan stretched himself. Zhang Fengzhi's case was finally solved.

Although Zhang Fengzhi himself is not a good person, when the police solve a case, it does not mean that a case in which a good person is killed is a case, and a case in which a bad person is killed is not a case.

Besides, there are so many good people in the world, and none of them have done one or two bad things.

Good and bad people often have two sides. The person who kills is not necessarily a bad person, and the person who is killed is not necessarily a good person.

Lu Chuan had seen more than one or two cases where honest people were driven to panic and committed murders in desperation.

In Lu Chuan's view, the most difficult part of working in the judicial system should be the judge's trial.

Some legal provisions provide for a certain range of prison terms, such as 3 to 5 years.

Three years is easy to deal with. If there are mitigating circumstances, you can be sentenced to three years or five years. If there are serious circumstances, the upper limit is five years.

The law clearly stipulates whether the circumstances are minor or serious, and the reporting of this circumstance is not judged by the judge, but by the case handling agency and reported to the court.

But under what circumstances can be sentenced to 4 years, there is an argument.

Under normal circumstances, you can refer to other cases to make a judgment, but what should you do if there are no other cases?
Judges are also human beings, and they have feelings as well.

Fortunately, from Lu Chuan's perspective, it was actually technical work. After confirming the identity information of the fingerprints and sending the things out, people from the action team would naturally go and arrest the people.

Ren Qiang had just finished communicating with Liangzhou City and confirmed that the suspect had been successfully arrested. They were all happy.

The hanging heart was completely settled.

There are many links in handling a case, such as case reasoning, evidence collection, on-site investigation and so on.

Every link has its difficulties, but in Ren Qiang's view, arresting the criminal suspect is actually the easiest.

Because this is a link that can be seen and seen, it is usually better to fight against the few.

Except for a few ruthless gangsters, many criminal suspects are no different from lambs being slaughtered when they are caught.

Even if an adult has a weapon in his hand, such as a sharp knife, he will not feel safe when facing a dozen tough men with guns.

Being arrested without mercy is the choice of many criminal suspects.

Even though he knew he couldn't run away, he had to struggle forcibly, and the only thing he could get in return was injury.

After hanging up the phone, Ren Qiang didn't have time to return to the detachment, so he directly arranged for the driver to turn the car around: "Go to the Youyou Road Police Station."

People with criminal records, especially those who have just been released, or are repeat offenders, although they do not have any locating equipment on them, they are one of the three key categories of people that the local police station pays attention to.

Although you don't know what these guys are doing every day, you need to do an inventory and check every once in a while to make sure that these people won't do anything big.

Of course, when the police station is busy, it is not entirely possible to take care of it.

No one is anyone’s biological father, so I can’t look at you every day.

At worst, if he commits another crime, he will be arrested and sent to education.

(End of this chapter)