Everyone has something to do, but Wang Bo, who has neither a job nor appointed to work, silently took out his cell phone, took a few photos, and sent it to the work group.

The trace inspection and current survey technicians in the work group are curious about death.

At this time, I saw news and found a new fingerprint, but I instantly entered shock mode.

Having fingerprints means that it is possible to directly lock the murderer. Such important evidence has not been discovered and discovered, which is surprising.

Li Yuanliang: [Did Jiang Yuan find the fingerprint? Where is it that we can’t scan? @Wang Bo]

Wang Bo then posted another photo of the fingerprint.

That is the bottom of the window frame, which should be considered a relatively obvious position.

Li Yuanliang: [This is not scanned? Just kidding?]

Wang Bo: [It is a fingerprint that is pressed quickly, which is particularly inconspicuous. Jiang Yuan used the toner from a laser printer, mixed with magnetic powder, and brushed it several times before it was brushed out. When I first looked at it, I also thought it was amazing. It was not quite the same as ordinary powder brushing.]

Wang Shouming: [Can you still use powder to make flowers?]

Wang Bo: [It was still not very good when I was the first time. Then the second time showed a little fingerprint. You had to use a exploration lamp to illuminate it. Then, it gradually became obvious when I saw such powder brushing for the first time.]

When brushing fingerprints, you just sprinkle powder on it and the fingerprints are revealed. Sometimes you don’t know it. In fact, it’s just that the sticky powder is not enough, so add a little more powder on it, and then it’s almost done.

The fingerprint of the printer toner mixed with magnetic powder is used to brush three or four times, four or five times, or gradually clear. This is something that Wang Bo has never seen or learned.

The work group in Changyang City became quiet.

It took a while before I saw someone speak again:

Li Yuanliang: [I asked an expert and said that the laser printer toner has a light degree that is close to copper powder and aluminum powder. The specific gravity is between aluminum powder, copper powder and magnetic powder, and has a slightly weaker magnetic property than magnetic powder. It is mainly due to its own electromagnetic properties. In addition to being used alone, it can also be mixed with magnetic powder in different proportions according to seasons and environment changes, and timely compensate for the loss of small particles of magnetic powder in long-term brushing... What the hell, it also needs to be brushed according to seasons and environment?]

Wang Shouming: [It's fake. If it's so useful, just put it in our survey box. Is it?]

Li Yuanliang: [I will repeat the original words of the expert. I didn’t say it, so I explained it in advance. The original words of people are: I am not an expert, using printer toner will only backfire. If you can use toner skillfully, just kneel down and shout long live.]

Wang Shouming: [Where is an expert who speaks like this?]

Li Yuanliang: [What my uncle said.]

Wang Shouming: [……Uncle said it is really right, long live long live long live long!]

Wang Bo's forehead was already swollen.

Although the people chatting in the work group are all colleagues and leaders are there, Wang Bo can't help but make a comment.

Wang Bo: [When I was in school, the professors taught that they should not brush the display multiple times. It would be fine if they were satisfied with the display one or two times. If they were not satisfied, brushing the display multiple times would easily cause the existing lines to be damaged, or they would appear dark. Only in extremely dry environments can they be brushed multiple times...]

Wang Shouming: [Xiaobo, although I don’t understand, let’s say, just listen to the theory. It’s safest to see the boss doing things.]

Li Yuanliang: [Don’t teach young people badly. This issue can be discussed. I just checked some information... Jiang Yuan used this method, the proportional configuration is very complicated, don’t think about it. I think the key to the problem is why he browsed the windowsill many times, and what did he find? @Wang Bo]

Wang Bo: [Footprints were discovered.]

Wang Bo then described Jiang Yuan’s situation after he arrived.

Both technicians and non-technicians in the work group were silent.

The footprints found by Jiang Yuan do not need to be displayed. It should be said that they are there, but there are too many footprints that no one wants to look down from the window.

The second floor of the color steel house is similar to the normal second floor, with a height of about 3 meters. Normal surveyors go to the room on the second floor to investigate, and they will not think that the murderer's route is to jump out of the window and walk.

Why bother? So far, no witnesses have been reported. The door is open. The murderer walked in normally and smashed the cashier to death. Why didn't he walk the door normally?

Li Yuanliang: [There must be an accident. Otherwise, if the murderer walked through the door normally, he would not leave any fingerprints or footprints, at least it would be indistinguishable.]

Gao Long: [It's just an accident to beat the cashier to death. Normally, I don't think about hitting someone to death.]

Li Yuanliang: [Are you too excited?]

Wang Shouming: [Emotional excitement is normal. Anyone who participates in the robbery must accelerate adrenal secretion. It is too scary to be used to it. There should be no such Liangshan people now.]

"Xiaobo." He Guohua shouted, waking Wang Bo who was immersed in his phone.

"Hey, let's see what the group said." Wang Bo quickly smiled at his master.

He Guohua said seriously: "Take Brother Jiang to the survey car and turn on the computer."

"Okay. Are you using the backend?" Wang Bo asked hurriedly.

Jiang Yuan said himself: "I want to compare fingerprints on the computer."

He just marked the feature points on his phone, but there was no comparison. After flashing it again, he took a photo again, and then prepared to use a computer to compare.

After all, the size of the screen is still very important. When you use a mobile phone to see fingerprints, many details cannot be clearly seen.

Wang Bo quickly responded and took Jiang Yuan out of the color steel house.

The two walked slowly along the acrylic Banqiao. Wang Bo walked apart and couldn't help but whisper: "Brother Jiang, why did the murderer jump from the second floor?"

Jiang Yuan heard a strong curiosity from Wang Bo's tone.

Jiang Yuan glanced at Wang Bo and thought, "Can we wait until we find the murderer and ask him?"

"This... can only be asked?" Wang Bo felt itchy all over and felt a little disappointed. Can the case he asked was called investigation?

Jiang Yuan could sense the awkwardness on Wang Bo's body, smiled and asked, "Do you have to guess?"

Wang Bo was indeed excited: "What are the reasons?"

"I'm too lazy to guess. I'm not interested." Jiang Yuan told him bluntly, "I'm willing to do technology. For me, finding footprints is more interesting than finding middle fingerprints or DNA."

Wang Bo said "Ah": "No, even if we are technical, it's just like that, but it's just like that..."

He said it twice in a row, and it is likely that he was explaining it in polite language: That's it?

Jiang Yuandao: "Liu Jinghui, Liu, from the Provincial Department, probably meets your requirements more. He likes to play reasoning..."

"He is the kind of pure guessing... no, the kind of pure reasoning, I don't like it either." After Wang Bo finished speaking, he was a little embarrassed and hurriedly said: "I'm not talking about work, nor is he saying that his methods are not good, but his hobbies are different in personal interests."

Jiang Yuan expressed his understanding that people are diverse. If you do cases, you can understand this better if you do more than you do. Some people like power, some people like money, some people like women, some people like Japanese dogs, some people like reasoning, or like Wang Bo, who likes technology and reasoning...

Jiang Yuan made a big breakthrough in the case, and Wang Bo looked at Jiang Yuan again and felt different.

As he spoke, Wang Bo gradually let go and couldn't help but say, "I think there are limitations when we use technology to solve cases."

Jiang Yuan said: "That's sure."

Wang Bo: "What I mean is that if you didn't judge the murderer's movement, or if he jumped down, the place where he landed was not the land, but the clean cement floor, without leaving any footprints, or if it was left, he would just clean it up. Will our case be unable to continue? Thinking about it this way, it would be very difficult."

Jiang Yuan shook his head: "It will become difficult, but it won't be impossible."

"There is any other way?"

"Of course. The most direct solution is to scan the entire room, take down all the footprints, and then compare them with the movement of the footprints outside."

“This is a lot of work.”

Jiang Yuan glanced at Wang Bo and said, "So many people are idle. What kind of workload is afraid of? If you have a murder case, just need to have a plan. Human resources expenditure is the responsibility of the detachment leader."

"Ah...this..." Wang Bo had to admit that this plan really could bring the murderer out.

Although there are so many footprints on the construction site, there are still a few people who will enter the cashier's office, and it is estimated that the footprints of about 10 people are only about 10 people.

Then find out all the footprints of these people, draw on paper, and draw the moving lines. There will definitely be a few footprints with low suspicion, and a few footprints with high suspicion. In this way, the range of the murderer can be narrowed to a certain extent.

Jiang Yuan continued: "In this way, if you look back on the footprints, you may find a set of footprints that start from under the cashier's window. In this way, the fingerprints at the window will still be discovered at a certain probability."

Wang Bo nodded subconsciously. Indeed, if you use this method, as long as you are meticulous enough, you will definitely have to doubt if you find footprints under the cashier's window.

"If the footprints in the room are sorted out properly, it is possible to find the murderer's movement. On the contrary, the murderer's fingerprint will take some effort to find it." Jiang Yuan himself was also summarizing.

Wang Boshen agreed: "Many people probably don't know how to mix magnetic powder with toner."

"Thinking about the better, if the murderer had worn gloves at the time, he wouldn't be able to leave his fingerprints."

"Yes, what should I do?"

"So it's always right to master more technology." Jiang Yuan paused, and thought about it himself, saying: "If you can confirm your footprints, find the means of transportation when the murderer came, and there may be a breakthrough."

Wang Bo was stunned: "Yes, I couldn't find the means of transportation before, but I didn't have a grasp. Now that I have footprints, I can find the means of transportation. Should I report it to the leader?"

"Call me and report." If there are new clues, we should continue to investigate them.

Of course, what Jiang Yuan cares more about now is fingerprints.

However, as he said just now, there are so many people who follow the means of transportation and have more clues and evidence, which is not a bad thing.

When he arrived at the survey vehicle at the entrance of the construction site, Jiang Yuan got the computer, connected it to the intranet, and checked his fingerprints himself.

At about the time, more detectives and technicians also started to move.

Yu Wenshu is indeed very interested in new clues and investigation directions.

Fingerprints may not necessarily produce results, he is definitely willing to expand his investigation direction.

The walkie-talkie left in the survey vehicle also rang twice from time to time.

All inside and outside the construction site were in operation at this time.

There are technicians who are fixing their footprints inside, and there are criminal policemen who are rushing to find transportation outside.

Not long after the construction site went out, there were gradually prosperous markets and shops. Where the police surveillance video was not captured or where they were avoided, they might be surrounded by someone's video. However, this requires one family to ask and check.

Jiang Yuan pulled out his fingerprint, carefully made the feature points, and then carefully compared them...

"Well, it's because the screen is too small." Not long after, Jiang Yuan won the fingerprint.

As expected, the suspect Qi Penghu is a fugitive. He was once sentenced for theft and robbery and also participated in the case of the black association organization...

Qi Penghu in the photo has short hair, short nose, big mouth, rough skin, knife marks at the corners of his eyes...

The fierce appearance is the kind of thing that is not easy to find a normal job.

Jiang Yuan made a submission in the system background, stretched his body, and looked around.

The construction site is called "Binhu Spring Greening Landscape Project". It is located in the old city of Changyang City. There are many prosperous areas nearby. People passing by or local residents taking a walk will curiously look at the police and police cars coming in and out here. They are also a little brave and bored, and stand not far away to watch.

Jiang Yuan turned his head and saw a man with a special appearance. He looked about thirty years old, with short hair, short nose, big mouth, rough skin, and knife marks at the corners of his eyes...
Chapter completed!