Chapter 536

The urban area of Qingbai City is not small, and the total of five districts is widely distributed. The third and most important case in the Jingyang Line triple homicide case occurred in Qingbai City.

Qingbai City and the Provincial Department therefore made a big fuss. Because according to the expert's judgment, the murderer must be very familiar with the railway line and the railway timetable, and at the same time, should be familiar with the local situation. The last point made the experts have great expectations for Qingbai City.

After all, the population of Qingbai City 20 years ago was not large, and it was mainly based on state-owned enterprise factories and mines. There was little personnel movement, so the probability of finding the murderer was high.

However, the result did not go as wished, and this shelving lasted 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 who handled the case back then must have retired.

The one with the highest position left is Zhang Shizhong, the captain of the Network Security Detachment of the Qingbai City Criminal Investigation Detachment. He is also a man in his fifties, but when talking about the Jingyang Line triple homicide case, he is still articulate, obviously with deep memories.

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

The restaurant is a fresh fish shop, specializing in river food, and does not pursue special practices. It is a pot of fresh fish, all about half a catty, and stewed with high soup, truly fresh on top of fresh.

The fish is stewed extremely rotten, so you have to be very careful when picking it up, and the meat and thorns separate when put into the bowl.

Of course, the most delicious is the soup, which is so fresh that people can't help but drink it one sip after another.

The tofu in the soup is even better than the fish, but if you eat a few mouthfuls of tofu and then a mouthful of fish, you will feel that the fish is delicious. If you have another bowl of soup, it is simply a human delicacy.

Jiang Yuan drank a bowl of soup and a mouthful of meat, sweating all over, before asking Zhang Shizhong, "I saw that you took a lot of footprints in the surrounding area. Didn't you find suitable clues back then?"

Zhang Shizhong put down the spoon, wiped his mouth, shook his head, and said, "Footprint collection is just collection. In the end, there are few people who can be found, and the footprints collected are very far from the crime scene, and they can't be linked to any suspects."

The crime scene is on the train tracks, and both sides of the tracks are gravel, so it is basically impossible to leave footprints.

Jiang Yuan didn't count on this either. He drank two sips of soup and continued, "What about eyewitnesses? Maybe you can find eyewitnesses through footprints?"

Zhang Shizhong looked at Jiang Yuan strangely and said, "Just from the footprints, you can't determine the time. The person who left the footprints might have passed by a few hours ago, or it might have been a few dozen days ago. It's hard to find eyewitnesses, right?"

"What you said, in fact, the freshness of the footprints, a few dozen days ago is unlikely. It rained two days before the incident, and everyone was affected by it. Analyzing the footprints specifically, the footprints on the day of the incident and the day before, added together, there are at least ten."

"I don't know about this." Zhang Shizhong shook his head helplessly: "As for footprints, experts were actually asked to look at them back then, but we all find people first and then compare the footprints."

"En, the technology now is better than before." Jiang Yuan nodded. It goes without saying that technology has always been moving forward. Although in the past few decades, many technical experts have emerged in China's footprint identification, a 53-year-old shepherd old man has become a top criminal investigation expert in China with a technique of "footprint tracking," known as the "God's Eye."

But later generations are standing on the shoulders of predecessors to do research. After half a century of development, the overall identification level has improved a lot, and some experiences and techniques that predecessors did not have have been summarized.

And this series of techniques, in the past twenty years, is exactly the outbreak period.

When the triple homicide case appeared, footprint identification was already relatively common. Judging age, gender, height, etc., was not a big problem.

But in terms of use, finding people through footprints is not the mainstream. It mainly depends on finding people and then verifying them through footprints, and it relies more on shoe prints than footprints.

This is actually related to the era. People around 2000 would not have a cabinet full of shoes at home. Normal people have one or two pairs of shoes to wear. They don't change shoes much in their daily life until the season changes. On the other hand, shoes won't be easily discarded until they are worn out. Cobblers are ubiquitous in street corners and alleys, and everything from soles to uppers to surfaces can be repaired.

So, even if the suspect discards the shoes, from the scrap pickers to the waste collectors to the garbage dumpers to the garbage pickers, there will always be someone who will collect this pair of shoes.

This provides the basis for comparing suspects through shoe prints.

Nowadays, such opportunities are becoming less and less. Ordinary people change shoes to wear, and there are those who sell second-hand shoes. Shoes thrown into trash cans are not necessarily picked up by others...

And from shoe print identification to footprint identification, it is another layer of difficulty, and it also requires later generations to constantly summarize experience. In academic terms, the regression formula must be written.

In fact, in the past twenty years, various scientific and technological achievements have been explosive. Although there are broken articles that waste words and cheat funds, some people have indeed made achievements. In the field of footprint identification alone, there are quite a few science and technology progress awards.

Of course, there are still people who don't trust the Science and Technology Progress Award. In this regard, scientists in the field of basic science may not be able to debate, but technicians in the field of criminal investigation want to prove themselves very simply. Brothers who don't believe it, find a place that is important and special to pee, and leave a urine footprint by the way, and see how many days it takes to catch yourself.

Zhang Shizhong only has a rough concept of footprint identification, neither knowing where the limit is nor knowing the level of the expert's level.

However, seeing Jiang Yuan's expression of confidence, Zhang Shizhong said, "If you can catch the murderer through footprints, then it's definitely no problem..."

"It hasn't reached that step yet." Jiang Yuan coughed twice and emphasized, "The footprints at the scene are very far from the crime scene. It can't be said who left them, and it can't be proven that the murderer left them. Let's start by finding eyewitnesses first."

"It's hard to find people with footprints, and they are people from twenty years ago, right?" Zhang Shizhong was a bit surprised.

Jiang Yuan said "En" and said, "As for the difficulty, it's about the same as finding a murderer in an ordinary case."

He used LV5 footprint identification, plus a temporary skill +1 to find the murderer. Later, he might have to use LV5 imaging. To be honest, with this set of skill combinations, solving a current homicide case might be easier than killing one now.

However, even LV6 footprint identification cannot directly call out the murderer's ID number, so the resources that cooperate with it cannot be less. The investigation that should be done, the people that should be found, and the inquiries that should be made are all indispensable.

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

Looking at this case, just finding these passersby might take hundreds or thousands of man-days, and the results found may not necessarily be useful.

Zhang Shizhong could immediately think of this point, and his expression became serious.

Others can brag and draw cakes, but this expense and the resources to be used are real.

Xi...

Huang Qiangmin drank the soup and made a satisfied sucking sound.

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

"We are working for you for nothing this time. Not only is Jiang Yuan fighting, but there are also so many people like Wu Junhao helping, and we don't want a penny of your salary." Huang Qiangmin said lightly, "As for the expenditure of funds, this is mainly determined by the direction of the case, not to say that your funds are to be wasted..."

"That of course, that of course." Zhang Shizhong apologized quickly: "I don't mean that, I mean... hey, fine, I'll report to the boss, as long as the case can be solved, anything is fine."

Jiang Yuan said warmly, "This case has been separated for too long. To rebuild it, no matter from which angle it is carried out, there are always a few steps that require massive expenses and manpower. You must have expectations."

"I understand. Hey, understand, the matter of funds, our bureau has actually discussed it long ago. However, thinking about being willing to pay, and really looking at the bill, this gap... understanding is long live, understanding is long live." Zhang Shizhong said with a helpless smile. As the saying goes, if you are not in charge, you don't know the price of firewood and rice. The Qingbai City Bureau is indeed ambitious about the case, but it is also true that it hurts.

Huang Qiangmin scooped fish soup for Zhang Shizhong, and after his heartache passed, he said, "This case, the Provincial Department and the Ministry must have support. The railway side is also willing to give some support, I guess. Cui Xiaohu, Cui Chu, and Li Chu are helping us run..."

Zhang Shizhong's mood improved a lot: "It's best to have support..."

"There should be an interrogation expert from the Ministry coming tomorrow." Huang Qiangmin looked at Jiang Yuan: "If you can find someone."

Jiang Yuan nodded without saying a word. It has been so long, it is easy to identify footprints, but it is difficult to find people through footprints.

Fortunately, Qingbai City has a large factory and mine population. Although there are individual households in the small market near the railway line, most of the pedestrians should belong to factory and mine employees and their families. In fact, most of the individual households in the market are also factory and mine families and relatives. This part, as long as you work hard to find it, there is always a trace to follow.

Furthermore, Jiang Yuan does not seek to find the owners of all footprints. He just wants to find some people as much as possible, plus the records of the year, and then decide in which direction to advance.

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

With these 400-plus minutes of imaging enhancement, Jiang Yuan first processed various footprint pictures.

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

Zhang Shizhong followed several leaders of the Qingbai City Bureau back and forth, listening to these newly bought high-performance computers shouting louder than the women in the business K, and couldn't help but call out bad.

The machines are used so fiercely, when it comes to using people, I don't know what it will be like. ===== CHAPTER 537 =====