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

Chapter 67 I'm Not A Murderer

The last type of fingerprint identification is called an exact match.

It is to select at least thirteen feature points on the target fingerprint, and then completely match them with the fingerprints in the database.

Only when all the selected feature points are successfully matched can the fingerprint identification be successful.

The system will give a special beep prompt indicating that the matching is successful.

This kind of fingerprint identification and analysis method is not used by ordinary people.

Unless you encounter a very simple fingerprint match, that is, the collected fingerprint is very clear without any deformation, and can be compared with the rubbing fingerprint with the naked eye.

There is another kind, which is a master of technology, who is very confident in fingerprint preprocessing, and the feature point marking and calculation are very clear.

Lu Chuan... which one is it?

The comparison of feature points is not a simple image processing, it just looks like it.

For each feature point, when marking, the angle and length should be calculated according to the different points, and the data should be recorded on the horizontal axis.

In this way, the system will make a comparison based on these data.

Liu Guodong was also surprised.

They were mainly observing Lu Chuan's fingerprint preprocessing behind them just now, and they didn't notice that the fingerprint match he clicked was an exact match.

The difficulty of this is not a star and a half stronger than the fool mode and probability analysis mode.

The trace inspection of the Haizhou Criminal Investigation Detachment...is it about to stand up?
Lu Chuan's attention was on comparing the archives of the successful target.

"It's the porter for the exhibition hall." Lu Chuan looked at Liu Guodong excitedly: "Master, give me some more time."

"I can compare these fingerprints in about half a day, and the investigation by the operation team will have a direction."

Why is fingerprint identification analysis so important in solving crimes?

Not only to provide clues when there are no clues, but to lock the suspects when there are suspects.

There is also to provide investigation confidence for the investigation of the action group.

Especially during interrogation and interrogation, with this evidence in hand, the difficulty of judgment is greatly reduced if the other party says they are not lying.

Just like the oiran in ancient times, everyone wants it, the key depends on whether there is enough money in the pocket.

Enough money, let's talk about romance, poetry and songs.

28:[-] p.m.

A stack of fingerprint identification and analysis reports was sent to Qin Yong's office.

"Captain Qin," Liu Guodong's expression was extremely excited, and this time the survey is about to show his face again: "The frame, oil painting and fingerprints on the skin are all authenticated!"

Lu Chuan collected a total of 79 fingerprints, 78 of which were all successfully compared.

This provides an excellent direction for the next investigation work.

"Good good!"

Qin Yong patted his thighs continuously.

It seems that what you are holding in your hand is not a few reports, but mountains of gold and silver.

"Now Kan did a good job this time!"

"It's all Lu Chuan. From yesterday to now, he has been busy with fingerprint collection and analysis. He hasn't closed his eyes for almost 48 hours."

Liu Guodong felt a little emotional, the most valuable thing about being a criminal policeman is his hard work.

When encountering a task, dare to fight and go up.

While having technology, there must also be dedication.

This time, the current survey and trace inspection work continued. On the one hand, Liu Guodong's own strength was insufficient, and on the other hand, Liu Guodong wanted to test Lu Chuan.

As a result, the result was clearly very satisfactory.

From now on, Lu Chuan is fully capable of acting alone.

Liu Guodong can also hand over a lot of work to him.

Qin Yong nodded appreciatively, although he didn't close his eyes for two days and one night.

"I'll give you two days off for survey later haha!"

After finishing speaking, Qin Yong walked out of the office with the report: "The task force, all responsible persons, will have a meeting in Conference Room 10 in [-] minutes!"

This meeting will end soon.

The division of labor investigation was mainly based on the fingerprint comparison results of Lu Chuan's identification and analysis.

Theoretically speaking, all the fingerprint owners that appear on the painting may be the murderer.

Of course, the owner of the fingerprint on the frame is less likely to be the murderer.

The owner of the fingerprints on the screen may have been left by visitors.

After all, paintings have little protection and anyone can touch them.

The most suspected person is actually the owner of the three fingerprints that Lu Chuan extracted on the skin.

The skin is sealed with resin to form a painting, so who else can touch the skin except the murderer?
"Arrest Liang Song immediately!"

That's right, the owners of the fingerprints on the skin, one of them is the grassroots painter Liang Song.

after an hour.

"Who are you talking about?"

"The person who died...was Zhang Zixuan?"

Liang Song's expression was full of horror.

Ren Qiang and Zhang Hui looked at each other, and Zhang Hui said, "Liang Song, tell me, how did you kill Zhang Zixuan, why did you kill her, and where is the first crime scene!"

"You guys... suspect that I killed her?"

Liang Song struggled and twisted, and the shackles on his hands rattled.

"I didn't kill her!"

"I really didn't kill her!"

"How could I kill Zixuan... woo woo woo"

Faced with the news of Zhang Zixuan's death, Liang Song was very emotional, and the sadness that flashed across his face was easily captured.

After being hysterical, he even started to cry.

It took a long while before Liang Song's mood stabilized.

"Do you smoke?"

Liang Song nodded numbly, Zhang Hui stood up, and lit a cigarette for Liang Song.

The strong smell of tobacco made Liang Song's expression slightly relaxed.

"I really didn't kill her, and it's impossible for me to kill her. I love her so much, how could I kill her?"

"Liang Song, now that Zhang Zixuan has been killed, the human skin has been hidden in an oil painting, and this oil painting was found in your studio."

"And," Ren Qiang took out a report: "This is a fingerprint identification analysis report. We found your fingerprints on that pair of human skin."

"These... how do you explain?"

In the interrogation room, Liang Song's psychology was on the verge of collapse.

"I...I don't know...but I really didn't kill her."

Liang Song seems to have lost the ability to answer questions normally.

Ren Qiang let out a sigh of relief, this was exactly what he needed.

Under such circumstances, Liang Song would not lie.

"Then tell me first how you and Zhang Zixuan met, when and where you last saw her."

"Zixuan...we met a year ago..."

As Liang Song recalled, the relationship between the two gradually became clear.

Zhang Zixuan joined Haizhou Vocational and Technical College after graduating from university.

Usually I like painting more, but by chance, I met Liang Song.

A year ago, I started to study painting in Liang Song's studio.

"Zixuan comes to my studio every Wednesday, because it is a weekday, there are very few students in the studio, most of the time there are only two of us."

Although Liang Song is a grassroots painter, he has not studied painting systematically.

But his talent is very good, and he has a bit of an artist's breath.

Unlike most artists who are not slovenly, Liang Song's long gray hair is well-groomed.

Deep eyes, very focused when painting.

This is a high-quality uncle who is emotional, artistic, talented and rich.

"We're in love, really, we're in love."

Liang Song's expression became relaxed in the memories: "But... Zixuan's boyfriend found out about us..."

(End of this chapter)