civil forensic

Chapter 156 Sneakers

Wu Junhao stood on the stairs going up from the 28th floor, watching Jiang Yuan below who was searching almost inch by inch, and soon became bored.

He also often appears on the scene, but he has never seen such a careful on-site inspection.

But today's situation is special, Wu Junhao can't run if he wants to.

If you go out to do something and come back and see Jiang Yuan lying in a pool of blood, how can you explain it?

It's a pity that it isn't.

The man with long arms and long legs, like a giraffe, has an easy-to-use brain, but if he is stabbed, his struggling posture is probably similar to that of a short wax gourd like a sika deer.

So, even though he was bored, he could only guard him——Wu Junhao couldn't help but see scenes from various movies in his mind.The bodyguards who went to the bathroom, the security guards who ran to gamble on the horses, and the mercenaries who fucked a few women temporarily, after peeing, all they saw were cool.

Huang Qiangmin next to him waited patiently.

In fact, he could have gone back a long time ago, but he stuck to the scene, and the others could only accompany him.

Wu Junhao moved, moved, came to Huang Qiangmin's side, and said: "It's really boring to engage in technology."

Huang Qiangmin glanced at him and asked, "You're bored, aren't you?"

It's not boring enough, how could he chat with the captain.

Wu Junhao didn't answer, just said: "Should we just wait like this?"

"Do you have any idea?"

"Let me take someone to search the buildings. If we search layer by layer, we might catch the murderer." Wu Junhao wanted to go out and play, and he didn't hesitate to work overtime.

Huang Qiangmin said: "Someone went to search."

"They're not as good as I. I can search every corner."

"This building is huge. There are also various public areas, bathrooms, lounges, and utility rooms..." Huang Qiangmin was rambling, so he didn't let Wu Junhao go out.

Now there are three squadrons in Wanghe Building and its surroundings, and Wu Junhao is not needed at all.

Furthermore, the people in the No. [-] Squadron were already working outside, and the addition of Wu Junhao was just making trouble.

Wu Junhao looked down with a sad face, only feeling that he was suffering more than Jiang Yuan who was working.

"Okay. Let's go back." Jiang Yuan took more than a hundred evidence bags of evidence, which is considered to be the end of the inspection of the fire stairs.

Wu Junhao breathed a sigh of relief, as if he had been released, and asked as he walked, "Did you find anything?"

"I don't know. It's basically trace evidence, and I can't see it when I go back. It has to be sent to Changyang." Jiang Yuan can do the on-site investigation very carefully, but the inspection of trace evidence has to go to a professional laboratory.

Don't say he doesn't know it yet, even if he does, Ningtai County can't afford the equipment.

Don't even think about matching it, just buy a new one that is better, Huang Qiangmin agrees, and the audit can stop him.

Of course, Huang Qiangmin never thought about such a thing.

He directly ordered someone, and said: "You and Lu Jianfeng, send the things to Changyang, and wait for them to check on the spot. I will call them later."

Lu Jianfeng is the squadron leader of the Criminal Science Squadron, Jiang Yuan's immediate boss, so he was sent by Huang Qiangmin to deliver evidence.

However, the internal working mode of the criminal police brigade is like this. The squadron leader is equivalent to the team leader in the class. He usually collects homework and leads the team to do some work. .

Changyang City is the capital of the province, and the level of the criminal police detachment is more than one level higher than that of Ningtai County. If I trouble someone to do a test, I must say something nice.

But it's enough to say something nice.The Tan Yong case happened only a few months ago. The Ningtai County Criminal Police Brigade supported a dog and Jiang Yuan and other criminal police officers from the Changyang City Criminal Police Detachment. The incense had not yet been burned.

"Don't go home at night." Huang Qiangmin yelled at Jiang Yuan again, saying, "Just sleep at the work unit. I'll ask the police station to pay more attention to it. Usually it doesn't matter. This method is the safest and saves the most effort. .”

"Okay." Jiang Yuan agreed.

He insisted on going home now, maybe he had to bring bodyguards back.

Even so, the home is certainly not as safe as the workplace.It's better to stay up late and work overtime in the unit.

The most important thing is that there is still no proof that there really is a murderer.

Although Jiang Yuan was able to accept the humiliation after being enlightened by his master Wu Jun, but before that, he still hoped that the impact would be less.

……

county bureau.

From outside the gate, you can see the bright lights and the busy atmosphere of people coming and going.

For police officers, standing three stops away and looking at the police station today, they can smell the smell of murder.

In the forensic office, Wu Jun not only made the floor, but also slept for a long time.

Seeing this, Jiang Yuan took Wang Zhong directly, and reassembled his "high-end computer" to the trace inspection office next door, and then turned it on for video enhancement.

In the trace inspection office, Yan Ge, who was also working overtime, was stunned for a while, and then said helplessly: "You don't want to disturb your master, so you use this engine to torture us."

"My master is already asleep, and it would be cruel to wake him up again." Jiang Yuan said while offering to Zhonghua, and said with a smile: "Smoking a cigarette, sober your mind, I can do it very quickly."

"I told my wife the same thing last time." Yan Ge laughed at himself, picked up a cigarette, and soon became happy under the stimulation of nicotine.

Jiang Yuan pulled out the video that was just uploaded today from the intranet, sat on a chair, and began to operate seriously.

Enhancing video is inherently more difficult and complex than enhancing images.

The simplest video enhancement is to enhance each frame of the picture.The simpler way is to intercept a few frames from the video, enhance them, and analyze the desired target directly.

Jiang Yuan didn't know what he could see this time, so it was an overall enhancement of the video.In fact, it is to use software and algorithms to strengthen the whole, and then look at the results.

So far, the criminal police from several squadrons have sent back a total of 6 mobile phones with 6 videos.

It didn't take long for the 6 videos to be aimed at the window of the incident. The first video Jiang Yuan saw was only 3 seconds, and the longest follow-up video was more than ten seconds.

Shooting angles and shooting distances also vary.

There are two videos taken from the downstairs, which are almost useless. The two videos taken from the other two buildings are not bad. The remaining two videos also don't show much.

Jiang Yuan cut out the two positive videos and enhanced them respectively.

The video enhancement algorithm can be run over and over again.

Moreover, unlike most people's imagination, video enhancement often means that after choosing an algorithm, you can run it many times with this algorithm, but it is not easy to change another algorithm and run it again.

Because the principles of different video enhancements are often in conflict, one kind of running, and then running another, not only will not be clearer, but will often be completely blurred.

Jiang Yuan also got angry, first chose a suitable algorithm, ran for more than an hour, found that the effect was not obvious, changed another algorithm, and then ran wildly.

In the process of running the algorithm, Jiang Yuan went back to the office to sleep.

Sleep for an hour or two, and then come and see.

Yan Ge and Wang Zhong were so quarreled that they couldn't help it. After finishing their work, they simply carried the camp bed to sleep in the forensic office.

In this way, in the morning, Jiang Yuan took out the video with the best conditions and played "Let's find fault" frame by frame.

It is very difficult to enhance a single picture at this time, but at last, I can vaguely see something.

"Is there a pair of shoes here?" Jiang Yuan pulled Wang Zhong over and asked him to look at the picture on the screen.

Across a distance of tens of meters, maybe hundreds of meters, the camera lens of the mobile phone is pulled to the nearest, and the portrait is only a little big, and then separated by the glass curtain wall, to see if there are a pair of shoes inside...

But under high magnification, Wang Zhong actually saw a pair of sneakers.

"Really? Are there really a pair of shoes?" Wang Zhong didn't believe it.

"And it's two-color or multi-color." Jiang Yuan tapped the screen vigorously.

He has no doubts about the results he has made.

"Looking for Team Yellow?"

"Look for it."

Jiang Yuan replied, relaxing a little.

Huang Qiangmin quickly brought people to look at the pictures.

Enhanced pictures and videos are not completely comprehensive enhancements, but more like a beauty camera, where you enhance one part, you lose another part.

Therefore, the picture does not look very good.

As for the only pair of shoes, from Huang Qiangmin's point of view, there is actually nothing to see.

Maybe there is a murderer, maybe there are witnesses, maybe it's just an error in the image...

Huang Qiangmin didn't say a word, just nodded his head and said a few words of praise, and then said: "The social relationship of the deceased is also complicated, we are going to go through it first."

Finding the murderer along the social relationship has always been a good way to murder.

Especially for this kind of murderer who hides his head and shows his tail, he is often considered to be someone known to the deceased.

Jiang Yuan has little say in this traditional criminal investigation method.

He thought for a while and said, "It will take a few days for the trace evidence to come out. I want to go to the market to look at the shoes."

As soon as Huang Qiangmin heard it, he understood that it was Jiang Yuan who wanted to find shoes that matched the footprints.

If it can be found, it will certainly contribute to the case.

Huang Qiangmin has also seen other footprint experts do similar things, so he immediately agreed, and said: "You must always follow people by your side."

Jiang Yuan didn't refuse either, he had to do things anyway, and they could chat for a while together.

(End of this chapter)