Chapter 563

Qingbai City is a large city with a total of five districts spread out over a wide area. The third most important case of the three fatalities on the Jingyang Line occurred in Qingbai City.

As a result, Qingbai City and the provincial government went to war. Because according to expert judgment, the murderer must be familiar with railway lines and railway timetables. At the same time, he should also be familiar with local conditions. The last point makes experts have great expectations for Qingbai City.

After all, the population of Qingbai City 20 years ago was not large, and it was dominated by state-owned factories and mines. There was little movement of people, and the probability of finding the murderer was high.

However, the results did not go as expected, and this was put on hold for more than ten years. Although it was started in the middle, there was no result and it was still shelved.

Half of the police officers working in those days have retired.

The person with the highest position remaining is Zhang Shizhong, captain of the Internet Security Brigade of the Qingbai City Criminal Police Detachment. He is also in his fifties, but when talking about the three corpses on the Jingyang Line, he still talks clearly and clearly has a deep memory.

A few people simply found a restaurant and chatted while eating.

The restaurant is a fresh fish restaurant, specializing in river fresh food, and does not pursue any special cooking methods. It is just a pot of fresh fish, each weighing about half a catty, and stewed in stock, which is truly fresh and fresh.

The fish was so stewed that you had to be very careful when picking it up. The bones separated when you put it in the bowl.

Of course, the most delicious thing is the soup, which is so fresh that you can’t help but drink it one mouthful after another.

The tofu in the soup is even more delicious than the fish, but if you eat a few bites of tofu and then a bite of fish, you will feel that the fish is delicious. If paired with a bowl of soup, it is simply delicious.

Jiang Yuan drank a bowl of soup and a mouthful of meat until he was sweating all over, and then asked Zhang Shizhong: "I see that you have taken a lot of footprints in the surrounding area. Didn't you find any suitable clues at the beginning?"

Zhang Shizhong put down the spoon, wiped his mouth, shook his head, and said: "Collecting footprints is collecting, but only a few people can be found in the end. Moreover, the collected footprints are far away from the crime scene, and no suspects can be contacted. ”

The crime scene was on a train track. There were gravel on both sides of the track, so it was basically impossible to leave footprints.

Jiang Yuan didn't expect this, so he took two sips of soup and continued: "Where are the witnesses? Maybe we can find the witnesses through the footprints?"

Zhang Shizhong looked at Jiang Yuan strangely and said, "You can't determine the time just from the footprints. The person who left the footprints may have passed by a few hours ago, or he may have passed by dozens of days ago. It is difficult to find Witness it."

"What you are talking about, in fact, the freshness of the footprints is not possible dozens of days ago. It rained two days before the incident, and everyone was affected by it. Looking at the detailed analysis of the footprints, on the day of the incident Together with the footprints from the previous day, it’s at least ten times smaller.”

"I don't know about that." Zhang Shizhong shook his head helplessly: "As for the footprints, we actually asked experts to look at them at the beginning, but we always found the person first and then compared the footprints."

"Well, today's technology is better than before." Jiang Yuan nodded. Mu Yong admitted that technology has always been moving forward. Although many technical masters have emerged in domestic footprint identification in the past few decades, the 53-year-old sheep herder has also become a domestic leader with his "footprint tracking" technology. The top criminal investigation expert, nicknamed "God's Eye".

However, future generations do research by standing on the shoulders of their predecessors. After half a century of development, the overall identification level has improved a lot, and they have also summarized some experiences and skills that their predecessors did not possess.

This series of techniques has experienced an explosion in the past twenty years.

When Eucalyptus trichosanthes appeared, footprint identification was already relatively common. It was not a big problem to determine age, gender, height, etc.

But in terms of usage, finding people through footprints is not mainstream. The main thing is to find the person and verify it through footprints, and rely more on shoe prints than footprints.

This actually has something to do with the times. People around 2000 would not have a closet of shoes at home. Normal people only need one or two pairs of shoes to wear. They don't change shoes very much on a daily basis until the season changes. On the other hand, shoes will not be thrown away easily until they are worn out. Shoe repairmen are ubiquitous on the streets and alleys, and everything from soles to uppers to uppers can be repaired.

Therefore, even if the suspect throws away the shoes, there will always be someone from the rag picker to the waste collector to the trash collector to the trash picker who will collect the shoes.

This provides the basis for comparing suspects through shoe prints.

Nowadays, such opportunities are becoming less and less. Ordinary people change shoes at every turn, and some people sell second-hand shoes. Shoes thrown into the trash can may not be picked up...

From the identification of shoe prints to the identification of footprints, it is another layer of difficulty, and it also requires the continuous summarization of experience by later generations. To put it more academically, the regression formula must at least be written.

In fact, in the past two decades, various scientific and technological achievements have exploded. Although there are some shabby articles with a lot of words to defraud funds, there are also some people who have actually made achievements. In the field of footprint identification alone, the Scientific and Technological Progress Awards were given out to people of all ages.

Of course, there are inevitably some people who don’t trust the Science and Technology Progress Award. In this regard, scientists in the field of basic science may not necessarily be able to debate scriptures, but technicians in the field of criminal investigation want to prove themselves very easily. Brothers who don’t believe it, find an important person. Just pee in a special place and leave a peeing footprint. Looking back on it in a few days, you can catch yourself.

Zhang Shizhong only has a rough idea of ​​footprint identification. He doesn't know where the limits are or the level of experts.

However, seeing Jiang Yuan's confident expression, Zhang Shizhong said: "If we can catch the murderer through footprints, then there will be no problem..."

"It's not that step yet." Jiang Yuan coughed twice and emphasized: "The footprints at the scene are far away from the crime scene. It's hard to say who left them, and there's no way to prove that they were left by the murderer. Let's start by looking for witnesses."

"It's difficult to find someone by footprints, especially someone from 20 years ago." Zhang Shizhong was a little surprised.

Jiang Yuan said "yeah" and said: "In terms of difficulty, it's about the same as finding the murderer in an ordinary case."

He used LV5 footprint identification and a temporary skill +1 to find the murderer. If things go wrong, he will have to use LV5 imaging. To be honest, with this combination of skills, it may be easier to solve a murder case than to kill someone.

However, even with LV6 footprint identification, it is impossible to directly call out the murderer's ID number, so the resources to cooperate with it are also indispensable. The investigations that should be done, the people that should be found, and the inquiries that should be done are all indispensable.

In other words, Jiang Yuan can reduce the difficulty of finding people by tracing their footprints from a technical perspective, but it still requires a lot of resource support.

Judging from the current case, it may take hundreds or thousands of man-days just to find these passers-by, and the results found may not be useful.

Zhang Shizhong immediately thought of this point and his expression became serious.

Other things can be boasted, but the expenses and resources to be used are real.

Shhh…

Huang Qiangmin drank the soup and made a satisfied gulp.

Zhang Shizhong couldn't help but look over and said helplessly: "Director Huang, our Qingbai City is not a wealthy city..."

"We came out this time to work for you for free. Not only Jiang Yuan is fighting, but also Wu Junhao and so many people are helping. We don't want a penny of your salary." Huang Qiangmin said calmly: "As for the expenditure, it is mainly determined by the direction of the case. It doesn't mean to waste your funds..."

"Of course, of course." Zhang Shizhong quickly apologized: "That's not what I mean. I mean... Hey, okay, I'll report to the boss. As long as the case can be solved, anything is fine."

Jiang Yuan said gently: "This case has been separated for too long. To rebuild it, no matter from which angle, there are always several steps, which will cost a lot of money and manpower. You have to have expectations."

"I understand. Hey, I understand. The issue of funds has actually been discussed in our bureau a long time ago. However, the difference between thinking about paying money and really looking at the bill... Long live understanding, long live understanding." Zhang Shizhong said with a helpless smile. As the saying goes, you don’t know how expensive firewood and rice are until you manage to run a household. The Qingbai City Bureau certainly has intentions for the eucalyptus, and it is true that they feel pain.

Huang Qiangmin scooped fish soup for Zhang Shizhong, and when he was no longer distressed, he said: "The provincial department and the ministry must have support for this eucalyptus. The railway is probably willing to give some support. Cui Xiaohu, Director Cui, and Director Li are helping us run things..."

Zhang Shizhong's mood suddenly improved a lot: "It would be best if there is support..."

"Tomorrow there should be an interrogation expert from the ministry." Huang Qiangmin looked at Jiang Yuan: "If we can find someone."

Jiang Yuan nodded and said nothing. It has been such a long time since they last met. It is easy to identify footprints, but it is difficult to find people through footprints.

Fortunately, there are many factories and mines in Qingbai City. Although there are self-employed people in small markets near the railway line, most of the pedestrians should still be factory and mine workers and their families. In fact, most of the self-employed people in the market are also factory and mine family members and relatives. For this part, as long as you make an effort to find them, there will always be traces to follow.

Furthermore, Jiang Yuan did not seek to find the owner of all the footprints. He just wanted to find as many people as possible, and then decide which direction to advance based on the records of the year.

So, on the second day of arriving in Qingbai City, Jiang Yuan's temporary skill +1 was added to... Image Enhancement LV5.

With the help of more than 400 minutes of image enhancement, Jiang Yuan first processed the pictures of various footprints.

In the office that day, the roar of computers never stopped.

Zhang Shizhong followed several leaders of the Qingbai City Bureau to come and go, and heard these newly purchased high-performance computers shouting louder than the women of Shang K, and couldn't help but secretly say that it was not good.

The machines are used so hard, and I don't know how they will be used when people are used.