Chapter 12 Rottweiler

The police dog of the Ningtai County Criminal Police Brigade Police Dog Squadron is called Dazhuang. He is a Rottweiler about four years old, with a strong physique, a square face and bald hair. The average daily food standard is 45 yuan.

Compared with the police dog Heizi in Longli County next door, Dazhuang is younger, more handsome, and stronger. But it is also because of his youth that he has no medals of honor on his chest and no police-civilian co-construction projects behind him, so his daily food expenses are 30 yuan less than Heizi.

Dazhuang didn't know this, so his mood was still very stable. When he saw someone coming, he still showed pure happiness in his eyes, and his tail fluttered down.

"Dazhuang, sit down." The trainer probably felt that the police dog wagging its tail was a bit embarrassing, so he came from the other side of the wall and shouted loudly.

Jiang Yuan looked over and saw a tall policewoman with long and thin legs, thin waist and straight back, who just turned around.

At that moment... Jiang Yuan felt that her face was very similar to a Rottweiler.

He has a square face, splayed eyebrows, flat ears, and slightly dark brown almond-shaped eyes, which look sad.

"Li Li, can I borrow your kitchen to make fried rice? Do you have rice and eggs?" Wu Jun greeted without any politeness, and introduced Jiang Yuan by the way, saying: "My apprentice, the fried rice is quite delicious."

Li Li nodded politely to Jiang Yuan, and then said: "Pick up a few eggs from Da Zhuang's basket first, there is meat in it, I will ask the deliveryman to make up for it in the afternoon."

Da Zhuang sat up straighter when he heard his name.

This was not the first time Wu Jun came to Da Zhuang to get close to him. He smiled and agreed, and then asked: "Have you eaten? Let's have fried rice together?"

"Okay." Policewoman Li Li agreed readily, saying: "That's right, I'll make some time to cook for Da Zhuang."

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 are worse than those of the criminal police team. The training ground for the police dogs is hardened land, and the surrounding walls are made of the simplest red bricks and cement. Judging from the craftsmanship, it may be done by the dog police officers themselves.

The independent kitchen of the police dog squadron is just two bungalows. The construction period may date back to the 1980s and 1990s. It can only be said that a small county town under the jurisdiction of a prefecture-level city like Ningtai County has not made much progress in the dividends of the competitive era.

The equipment in the kitchen is complete, especially a large pot with a fierce fire stove underneath, which looks quite professional. However, Li Li pointed to the ordinary small stove next to it and said, "You use that, this is for Da Zhuang to cook. How much meat do you cut?"

"No meat. I will make vegetarian fried rice." Jiang Yuan said, "Eggs, rice, a little chopped green onion and oil are enough. Do you want to make more for the police dogs?"

"No need. Your fried rice is too nutritious and can't be fed to dogs."

As Li Li said, Take out the ingredients from the refrigerator, give some rice to Jiang Yuan, and throw all the pig's trotters into the dog's bowl; give some eggs to Jiang Yuan, and throw all the chicken chops into the dog's bowl; give some shallots to Jiang Yuan, and throw all the shredded carrots, broccoli, and cabbage into the dog's bowl...

The 45 yuan food standard for the police dog is pure food expenses, just like the 75 yuan food standard for the meritorious dog Heizi and the 3 yuan food standard for the recruits, which are also pure food expenses, not including water, electricity, gas, and rent and labor expenses. So everyone feels that it is enough to eat.

In comparison, Uncle Seventeen's egg fried rice uses one catty of rice for three people, and the cost is 2 yuan; half an egg, the cost is 5 yuan; vegetable oil, shallots, seasonings, etc., the cost is 8 yuan - in this way, the total cost of Jiang Yuan and others' meal is 5 yuan, and the average food cost per person is about 8 yuan...

But Uncle Seventeen's LV3 egg fried rice skill still makes this meal look delicious.

In comparison, Li Li's cooking skills are probably not even at LV1. This can be guessed by looking at Da Zhuang sniffing and eating, and Li Li's wolfing down.

"Come often when you have time." Li Li took a few bites and drank half a glass of water in one breath, then patted her chest and said to Wu Jun: "Captain Wu, you have recruited a talent this time, a person who can do things. Can you borrow him to our squadron? Look at Da Zhuang, other dogs are rushing to eat, but he wishes he could leave some..."

"I don't have the final say on hiring people." Wu Jun smiled and shirked, quickly finished the fried rice, stood up to pick his teeth, and said: "We still have work to do in the afternoon, so you can clean up the dishes yourself."

After eating and drinking, Wu Jun called Jiang Yuan and left, his movements were as skillful as those of a regular customer in the alley of Sanlipu.

Jiang Yuan looked back at Da Zhuang and saw that he was eating the 45 yuan in the bowl calmly. Not fast, not slow, his expression was as calm as a car refueling itself.

"The policewoman named her own police dog Da Zhuang, which is a bit strange." Jiang Yuan chatted while walking.

Wu Jun smiled and said, "It should be the name given by her previous trainer. They said that the first dog was called Da Zhuang, the second was called Er Zhuang, and so on, neatly and neatly."

"Where is Er Zhuang? Is he out on duty?"

"The plan stopped when a dog came in." Wu Jun curled his lips and said, "Captain Huang meant that dogs are too expensive, one is enough, and it is better to recruit a few auxiliary police officers with the remaining money."

Jiang Yuan thought about it and nodded in agreement.

Noon.

Jiang Yuan slept for half an hour, then got up, opened the fingerprints of the intentional injury case recommended by Xiao Wang in the morning, put them in a large picture, and looked at them carefully.

The suspect left four consecutive fingerprints, with different clarity and completeness. Choosing which fingerprint to focus on is the first thing to consider.

If we look at the completeness, the little finger should have the highest completeness, but it also has the highest probability of not being matched. Because the probability of sampling the little finger is the lowest, many places apply for temporary residence permits and the like, all use the thumb or index finger, and the fingerprint punching is also the same.

Relatively speaking, the index finger has the lowest completeness among the four fingerprints left by the suspect, and the extension is very wide, and the deformation is also the most serious.

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

The difficulty of marking the fingerprint of the little finger is relatively low. Of course, because the image is taken from the cylinder in sections, it may not be done with the level of Lao Yan and Xiao Wang, but since they participated in the fingerprint battle a few years ago, 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.

The fingerprint that is most likely to be unmatched due to the technology itself is the fingerprint of the index finger.

This fingerprint is very deformed. It can be imagined that when the suspect used it to beat someone, his grip must have been very strong, so that some of the fingerprint papillae of the fingers were squeezed together, and some were far apart, just like a winding mountain road that was flattened by a giant's foot.

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

This step is like restoring the winding mountain road to its original spacing and size on the plane.

Jiang Yuan first fine-tuned the left and right to the center by 5%, but it didn't feel enough, so he adjusted it to 10%, then 20%, and then fine-tuned it back a little bit...

There is no specific template for these operations. If there is any reference, the spacing of the baseline lines of ordinary people's fingerprints is 52 mm, but this reference value, to be honest, is really limited in the scope of guidance, especially when fine-tuning in units of 1%, a number representing the average value is really meaningless.

On the other hand, because fingerprints were taken in sections, and the skills of the on-site police officers did not seem to be very strong, the shooting angles of different photos seemed to have problems. It didn't matter at ordinary times, but now when they adjusted a little bit, it seemed that the synchronization was not enough.

Various factors intersected, so Jiang Yuan tried many times but failed to match.

When it was almost time to get off work, Xiao Wang ran over again, came to Jiang Yuan mysteriously, and whispered: "I checked, this case has participated in three fingerprint battles, but there was no result."

"Provincial?" Jiang Yuan paused the mouse.

"The first time was provincial, and the next two times were municipal." Xiao Wang paused, and then smiled: "The first time was still in the era of horseshoe mirrors, and there was no automatic fingerprint system. The second time, there was one, and the result was the same."

Horseshoe mirror is a handheld magnifying glass, the main part of which is similar to a microscope lens, and you need to put your eyes against one end of the eyepiece to see. Traditionally, it has been used for fingerprint matching, document inspection, and even physical evidence search, etc., and can also be used with a camera to take pictures and extract fingerprints. Before the emergence of automated fingerprint recognition technology, horseshoe mirrors were the most powerful weapon in the hands of trace inspection.

What Xiao Wang called the horseshoe mirror era refers to the period before the popularization of automatic fingerprint recognition technology. In the fingerprint battle at that time, 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 fingerprint matching is mostly based on rich experience and memory.

Jiang Yuan listened to Xiao Wang's words and nodded slightly. From his understanding, this case is a case that has received relatively high attention, but not top attention. And the serious injury case has been a backlog for more than ten years. The criminal investigation resources at this level are basically the end.

"I'll run it once." Jiang Yuan edited the feature points of the fingerprint that had just been adjusted, and then threw it to the automatic fingerprint recognition system to run.

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

Jiang Yuan and Xiao Wang looked through the 20 candidate fingerprints from top to bottom, and unsurprisingly, they only got disappointment.

"This is a matter of luck. Even if we match, we probably won't be in the front." Xiao Wang's technical ability is average, but he has some vision.

Jiang Yuan agreed: "Indeed, the adjustment is so large that the order given by the system is not very meaningful. The fingerprint ranked 50 may also be the suspect's fingerprint..."

"Forget it if it doesn't work. I'll look for another case later." Xiao Wang sighed and walked back.

Jiang Yuan held the mouse and moved it to the right. After thinking about it, he directly set the number of fingerprints in the candidate review list to 150.

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

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

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

Mission: Match Liu Yu's injury case and assist in solving the case.

Mission content: The victim needs to be comforted, the perpetrator needs to be punished, and both sides need peace of mind. Help them.

Jiang Yuan couldn't help but smile. He was originally prepared to fight this intentional injury case to the end. Now with the help of the system, he could keep his composure even more.