Chapter 12: Luo Weina

The police dog of the Ningtai County Criminal Police Brigade is called Dazhuang, a Luo Weina of about four years old, with a strong physique, square face and bald hair, and a daily meal standard of 45 yuan.

Compared with Blackie, the police dog of the neighboring Longli County, Dazhuang is younger, more handsome, and stronger. But precisely because he is young, he has no medals on his chest and no police-civilian co-construction project behind him, so his daily meal cost is 30 yuan less than Blackie's.

Dazhuang doesn't know this, so his mood is still very stable. Seeing someone coming, there is still simple happiness in his eyes, and his tail swings lightly.

"Dazhuang, sit down." The trainer probably felt that the police dog wagging his tail was a bit shameful, and scolded loudly from the other side of the wall.

Jiang Yuan followed the sound and saw a female police officer with a tall figure, long and thin side legs, thin waist and straight back, just turning around.

That moment... Jiang Yuan felt her face looked very much like a Luo Weina.

The face is square, the brow bone is eight-eight, the ears are lying down, the apricot eyes are slightly black and brown, and there seems to be sorrow.

"Li Li, borrow your kitchen to use it, fry some rice. Are there rice and eggs?" Wu Jun greeted without any politeness, and introduced Jiang Yuan: "My apprentice, fried rice is very delicious."

Li Li nodded politely to Jiang Yuan, and then said: "You take a few eggs from Dazhuang's basket first, and there is meat inside. I will let the vegetable delivery person make up for it in the afternoon."

Dazhuang heard his name and sat straighter.

It was not the first time Wu Jun came to rub Dazhuang, smiled and responded, and asked: "Have you eaten? Eat fried rice together?"

"Okay." Female police officer Li Li responded refreshingly: "Exactly, I have time to cook for Dazhuang."

The three of them talked and entered the kitchen of the police dog squadron.

In terms of infrastructure, the conditions of the police dog squadron were worse than the criminal police team. The police dog training ground was hardened land, and the surrounding courtyard walls were also the simplest red brick and cement. Looking at the craftsmanship, it was possible that the dog police officer did it himself.

The independent kitchen of the police dog squadron was only two bungalows. The construction era could be traced back to the 80s and 90s. It can only be said that small counties under prefecture-level cities like Ningtai County really have no achievements in competing for the dividends of the era.

The equipment in the kitchen was complete, especially a large pot, and the fierce fire stove underneath looked quite professional. Li Li pointed to the ordinary small stove next to it and said: "You use that one, this side is for Dazhuang to cook. How much meat to cut?"

"No meat. I only know how to make vegetarian fried rice." Jiang Yuan said: "There are eggs, rice, a little green onion and oil. Do you want to make more for the police dog to eat?"

"No need. Your fried rice has no nutrition, and it can't be given to dogs."

Li Li said and took ingredients from the refrigerator. She divided a little rice for Jiang Yuan, threw all the pig's trotters into the dog's rice bowl; divided a little egg for Jiang Yuan, threw all the chicken steaks into the dog's rice bowl; divided a little green onion for Jiang Yuan, and threw all the red radish, broccoli, and cabbage shreds into the dog's rice bowl...

The 45-yuan meal standard for police dogs is purely food cost, just like the 75-yuan meal standard for meritorious dog Blackie, and the 19.3-yuan meal standard for new recruits, which is also purely food cost, without including water, electricity, gas, or sharing rent and labor costs. So they all feel enough to eat.

By comparison, the seventeenth uncle's egg fried rice, three portions use one catty of rice, nuclear cost 1.2 yuan; half an egg, nuclear cost 0.5 yuan; vegetable oil, green onion and seasoning, etc., nuclear 0.8 yuan is enough—calculated in this way, the total cost of this meal for Jiang Yuan and others is 2.5 yuan, and the per capita meal cost is about 0.8 yuan...

But the LV3 egg fried rice skill from the seventeenth uncle still made this meal look colorful and fragrant.

In comparison, Li Li's cooking skills were not even Level 1. This point can be guessed from the appearance of Dazhuang sniffing and eating, and Li Li's wolfing down state.

"Come often when you have time." Li Li ate a few mouthfuls, drank half a glass of water in one breath, and then patted her chest and said to Wu Jun: "Team Wu, you recruited a talent this time. This is the person who does things. Can you borrow it to our squadron? Look at Dazhuang, other dogs are grabbing food, it wishes it could leave it..."

"I don't have the final say in using people." Wu Jun smiled and shirked, finished the fried rice quickly, stood up and picked his teeth, and said: "We still have work in the afternoon, leave the bowls and chopsticks for you to clean up yourself."

Wu Jun, who was full, called Jiang Yuan and left, his movements as skilled as a regular customer in Sanlipu Lane.

Jiang Yuan looked back at Dazhuang, and saw that it was eating the forty-five yuan in the basin with a calm expression. Not fast, not slow, with a calm expression like a car refueling itself.

"It's strange that the female police officer called the police dog she trained Dazhuang." Jiang Yuan chatted while walking.

Wu Jun smiled and said: "It should be the name given by her previous trainer. When they were there, they said that the first dog was called Dazhuang, the second was called Erzhuang, and they called all the way, neatly."

"What about Erzhuang? Went out to perform duties?"

"Entered a dog, and the plan stopped." Wu Jun curled his lips and said: "Team Huang's meaning, dogs are too expensive. One is enough, and the remaining money is better to recruit a few auxiliary police."

Jiang Yuan thought about it and nodded in agreement.

Noon.

Jiang Yuan slept on his stomach for half an hour, then got up, opened the fingerprint of the intentional injury case suggested by Little Wang in the morning, put it into a large picture, and looked at it seriously.

The suspect left four consecutive fingerprints, and the clarity and integrity are different. Which fingerprint to choose to attack is the first thing to consider.

If you look at the integrity, the integrity of the little finger should be the highest, but the probability of not getting a match is also the highest. Because the probability of fingerprint sampling to the little finger is the lowest, many places handle temporary residence permits, etc., all collect thumbs or index fingers, and fingerprint punch-in, etc., are also the same.

And relatively speaking, the integrity of the index finger is the lowest among the four fingerprints left by the suspect, and it is extended very wide, and the deformation is the most serious.

Jiang Yuan pondered slightly, enlarged the image of the index finger, and began to study it.

The marking difficulty of the little finger's fingerprint is relatively low. Of course, because it is an image taken in segments from a cylinder, it may still be impossible for Old Yan and Little Wang to do it, but since they participated in the fingerprint battle in previous years, it should still be correctly marked.

Therefore, the main reason why the little finger cannot be matched is more likely that there is no match in the fingerprint database. And this situation cannot be compensated by technology.

And the fingerprint that is most likely to be unmatched due to technology itself is the index finger's fingerprint.

This fingerprint is severely deformed. One can imagine that when the suspect used it to strike someone, their grip strength must have been immense, causing the papillary ridges of the fingerprint to be squeezed together in some places and spread apart in others, much like a mountain road that has been flattened by the stomp of a giant.

Jiang Yuan opened Photoshop and tried to use Photoshop-CS5 to do "Edit-Transform".

This step is like wanting to restore the mountain road to the original spacing and size on a plane.

Jiang Yuan first adjusted the left and right to the center by 5%, felt it was not enough, adjusted it to 10%, then 20%, and then adjusted it back a little...

These operations have no specific templates. If there is any reference, the spacing of the reference texture lines of ordinary people's fingerprints is 0.52 mm, but this reference value, to be honest, the range that can be guided is really limited, especially when fine-tuning in units of 1%, a number representing the average value is really meaningless.

On the other hand, because the fingerprint is taken in segments, and the technology of the scene survey police is not very strong, so the shooting angle of different photos seems to have problems. It doesn't matter at ordinary times, but now when adjusting a little bit, the synchronization is not enough.

Various factors intersected, making Jiang Yuan try many times, but none of them matched.

When getting off work, Little Wang ran over again, mysteriously came to Jiang Yuan's side, and said in a low voice: "I checked, this case has participated in 3 fingerprint battles, and there is no result."

"Provincial?" Jiang Yuan stopped the mouse.

"The first one was provincial, and the next two were municipal." Little Wang paused and smiled: "The first one was the horseshoe mirror era, and there was no automated fingerprint system. The second one started to have it, and the result was the same."

The horseshoe mirror is a handheld magnifying glass. The main part is similar to a microscope lens. It needs eyes to look at the eyepiece end. Traditionally, it has been used for fingerprint matching, document inspection, and even evidence search, etc., and can also be matched with cameras to take photos and extract fingerprints. Before the appearance of automated fingerprint identification technology, the horseshoe mirror was the most powerful weapon in the hands of trace examination.

The horseshoe mirror era mentioned by Little Wang refers to before the popularization of automated fingerprint identification technology. At that time, in the fingerprint battle, fingerprint experts were no longer primates with sparse hair sitting in front of computers, but primates with sparse hair holding horseshoe mirrors in one hand and fingerprint sheets in the other.

And the matching of fingerprints also relied on rich experience and memory.

Jiang Yuan listened to Little Wang's words and nodded slightly. From his understanding, the case at hand belongs to the case that has received relative attention but has not received top-level attention. And for a case of serious injury to this extent, and it is a cold case for more than ten years, it is basically the end of the criminal investigation resources obtained.

"I'll run it again." Jiang Yuan edited the feature points of the fingerprint he had just adjusted again, and then threw it to the automated fingerprint identification system to run.

Soon, a row of candidate fingerprints was listed on the right side of the screen.

Jiang Yuan and Little Wang looked at the 20 candidate fingerprints listed from top to bottom together, and unsurprisingly, they only harvested disappointment.

"This kind is trying luck. Even if it is matched, it is estimated that it is not in the front." Little Wang's technical ability is average, but his vision is still there.

Jiang Yuan agreed: "Indeed, the adjustment range is so large, the order given by the system has no reference significance. The fingerprint ranked 50 may also be the suspect's fingerprint..."

"If it doesn't work, forget it, I'll look for other cases when I look back." Little Wang sighed and walked back.

Jiang Yuan held the mouse, moved to the right, thought about it, and set the number of fingerprints in the candidate inspection list directly to 150.

In this way, the number of fingerprints matched by the system each time will be more than seven times the original, and the fingerprints at the back of the list have a lower probability of being matched.

Jiang Yuan was not in a hurry originally. After making the decision, he looked at the fingerprints with peace of mind.

After a while, a semi-transparent system prompt appeared in his field of vision—

Task: Match the Liu Yu injury case and assist in solving the case.

Task content: The victim needs comfort, the perpetrator needs punishment, and both sides need peace of mind. Help them.

Jiang Yuan couldn't help but be happy. He originally planned to die on this intentional injury case. Now that he has system bonuses, he is even more calm.