Chapter 350 Suddenly got busy
Visiting the office.
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 fingerprint is to connect the ridges one by one. This workload is still very large. 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 is because the environment is special and no one interferes. Lu Chuan works alone in the underground laboratory.
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, a similar comparison method is adopted. The fingerprint system will list the fingerprints with the most similar feature points based on 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.
Not all target fingerprints in the system are relatively complete. The fingerprints in the fingerprint database can actually be divided into two categories based on identity information.
One is identity information confirmation, which is the basic information of everyone who knows this fingerprint.
Most of these fingerprints are collected through two channels. On the one hand, they are formal channels, where police at the police station collect fingerprints, or when ex-criminals collect fingerprints after being arrested, etc.
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. A crime was committed and fingerprints were left at the scene, but the fingerprint information was not entered into the fingerprint system through formal channels.
In this case, it's just a matter of waiting.
Maybe one day you will be able to scan the other person's fingerprints, successfully match and capture the other person.
Another use is to combine cases. People who commit crimes rarely only commit one crime.
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?
The uncle is like this, and the little sister is like this too.
The same goes for criminal suspects.
Because human nature is like this.
The elimination of unique fingerprints is relatively fast.
Lu Chuan quickly eliminated all the first twenty fingerprints given by the system.
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 current detectives.
After all, this method has lower requirements for fingerprint preprocessing.
Lu Chuan spent the longest time observing the twenty-third fingerprint. "There is no special point...it's you!"
The similar fingerprints given by the system are actually not very different. The first-ranked fingerprint is the same as the 30th and 40th fingerprints. The similarity of the original fingerprints has a certain probability.
Sun Tao, male, 32 years old, a native of Haizhou, has been imprisoned for many crimes such as fighting, theft, and robbery.
This is the owner information of the twenty-third fingerprint.
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 no one has 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 has seen more than one or two cases where honest people were driven into panic and committed killers out of 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.
Legal circumstances and serious circumstances are clearly stipulated in the law, 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 a 4-year sentence can be imposed, there is an explanation.
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 them.
Ren Qiang has just finished communicating with Liangzhou City and confirmed that the suspect has been successfully arrested. They are a happy group.
The hanging heart has finally fallen to the ground.
There are many links in handling a case, including case reasoning, evidence collection, on-site investigation, etc.
Every link has its difficulties, but in Ren Qiang’s view, arresting the criminal suspect is actually the easiest.
Because this is a tangible and visible link, it is usually better to fight with more than less.
Except for a very few 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.
If you still struggle forcefully when you know you can't run away, you can only get hurt.
After hanging up the phone, Ren Qiang had no time to return to the detachment, so he directly arranged for the driver to turn the car around: "Go to Youhao Road Police Station."
People with criminal records, especially those who have just been released, or are repeat offenders , although there is no positioning equipment on him, he is one of the three key categories of personnel concerned by the local police station.
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 will not commit any major crimes.
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)