Chapter 155: Sports Shoes

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

He also often went to the scene, but he had never seen such a detailed scene investigation.

But today's situation was special, and Wu Junhao couldn't run away even if he wanted to.

If he went out to do something, and came back to see Jiang Yuan lying in a pool of blood, how to explain it?

It's a pity, isn't it.

A man with long arms and legs, like a giraffe, has a good brain, but if he is stabbed, his struggling posture is probably similar to that of a short winter melon like a sika deer.

So, although it was boring, he could only stay with him - Wu Junhao couldn't help but think of various movie scenes in his mind. Those bodyguards who went to the bathroom, the security guards who went to gamble on horses, and the mercenaries who temporarily fucked a few women, all saw that they were cold after peeing.

Huang Qiangmin next to him was waiting patiently.

He could have gone back earlier, but he stayed at the scene, and the others could only accompany him.

Wu Junhao moved and moved, and came to Huang Qiangmin, saying: "It's really boring to work on technology."

Huang Qiangmin glanced at him and asked: "You are bored, right?"

If he wasn't bored enough, how could he chat with the captain.

Wu Junhao didn't answer, just said: "Are we just waiting like this?"

"What do you think?"

"I'll take people to search the building, search layer by layer, maybe we can catch the murderer." Wu Junhao just wanted to go out and play, and he didn't care about working overtime.

Huang Qiangmin said: "Someone went to search."

"They searched better than me. I can find it in every corner."

"This building is big. There are all kinds of public areas, toilets, lounges, utility rooms..." Huang Qiangmin was long-winded, so he didn't let Wu Junhao go out.

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

Besides, the people of the first squadron are working outside anyway, and Wu Junhao is just a nuisance.

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

"Okay. Let's go back." Jiang Yuan took hundreds of evidence bags and finished the inspection of the fire stairs.

Wu Junhao was relieved immediately, as if he was released, and asked as he walked: "Did you find anything?"

"I don't know. It's basically trace evidence. I can't see it when I go back. I have to send it to Changyang." Jiang Yuan can do a very detailed on-site investigation, but the inspection of trace evidence can only be done in a professional laboratory.

Not to mention that he doesn't know how to do it, even if he does, Ningtai County can't afford the equipment.

Don't even think about buying a newer and better one. Huang Qiangmin agreed to it, and the audit will interrupt his back.

Of course, Huang Qiangmin never thought about this.

He pointed at someone and said, "You go with Lu Jianfeng and deliver the things to Changyang. Wait for them to check it. I'll call them later."

Lu Jianfeng is the captain of the criminal science squadron, Jiang Yuan's immediate superior, and was sent by Huang Qiangmin to deliver the evidence.

However, the working mode within the criminal police brigade is like this. The squadron leader is equivalent to the team leader in the class. Usually, he collects homework and leads the team to do work. When encountering a big case and collective action, the squadron leader is the battle model.

Changyang City is the provincial capital, and the level of the criminal police detachment is more than one level higher than that of Ningtai County. If you bother them to do the inspection, you must say something nice.

But saying something nice is enough. The Tan Yong case happened just a few months ago. At that time, the Ningtai County Criminal Police Brigade supported a dog and many criminal police officers such as Jiang Yuan to the Changyang City Criminal Police Detachment, and the incense has not been burned yet.

"Don't go home at night." Huang Qiangmin called Jiang Yuan again and said, "Just sleep at work. I'll ask the police station to keep an eye on your home. It's usually okay. This method is the safest and most labor-saving."

"Okay." Jiang Yuan agreed immediately.

He insisted on going home now, and he might have to bring bodyguards back with him.

Even so, home is definitely not as safe as at work. It's better to stay up late and work overtime at work.

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

Although Jiang Yuan has been able to accept the embarrassment after being enlightened by his master Wu Jun, he still hopes that the impact will be smaller before that.

...

County Bureau.

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

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

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

Seeing this, Jiang Yuan directly pulled Wang Zhong to disassemble his "high-end computer" and reassemble it in the next-door trace inspection office, then turned it on and did video enhancement.

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

"My master has fallen asleep, it's too cruel to wake him up." Jiang Yuan said, offering Zhonghua, and smiled: "Smoke a cigarette, wake up your brain, I'll do it quickly."

"I said the same thing to my wife last time." Yan Ge self-deprecatingly picked up a cigarette, and soon became happy under the stimulation of nicotine.

Jiang Yuan pulled out the video that had just been uploaded today from the intranet, sat upright in a chair, and operated it seriously.

Enhancing videos is inherently much more difficult and complicated than enhancing pictures.

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

Jiang Yuan didn't know what he could see this time, so he enhanced the video as a whole. In fact, it is to use software and algorithms to enhance the overall quality, and then look at the results.

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

The six videos were all within the window of the incident. The first video Jiang Yuan saw was only 3 seconds long, and the longest one after that was only ten seconds long.

The shooting angle and shooting distance also vary.

There are two videos taken from downstairs, which are almost useless. The two videos taken from the other two buildings, the two videos taken from the front are not bad, and the remaining two videos also cannot see much.

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

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

Moreover, unlike what most people imagine, video enhancement often involves choosing an algorithm and running it many times, but it is not easy to change the algorithm and run it again.

Because different principles of video enhancement are often in conflict, if you try one and then another, not only will it not be clearer, but it will often be completely blurred.

Jiang Yuan was also furious. He first chose a suitable algorithm and ran for more than an hour. When he found that the effect was not obvious, he changed to another algorithm and continued running wildly.

While running the algorithm, Jiang Yuan went back to the office to sleep.

Sleep for an hour or two and then come over and watch.

Yan Ge and Wang Zhong were so disturbed that they couldn't do anything. After finishing their work, they simply moved the camp bed to sleep in the medical examiner's office.

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

A single picture, then enhanced, is already very reluctant at this time, but at last, something is vaguely visible.

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

Separated by dozens of meters, maybe hundreds of meters away, when the mobile phone lens is zoomed in as close as possible, the portrait captured is only a little larger. Then, through the glass curtain wall, you have to see whether there is 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 Zhongdu 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 achieved.

"Looking for the yellow team?"

"Look for it."

Jiang Yuan answered, relaxing a little.

Huang Qiangmin quickly took people to see the pictures.

Enhanced pictures and videos are not completely comprehensive enhancements. They are more like beauty cameras. If you enhance one part, you will 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 tell.

Maybe there is a murderer, maybe there are witnesses, maybe the image is wrong...

Huang Qiangmin said nothing, only nodded and praised a few words, and then said: "The social relations of the deceased are also relatively complicated. We are going to sort them out first."

Following social connections to find the murderer has always been a good way to commit murder.

Especially for such hidden murderers, they are often considered to be people known to the deceased.

Jiang Yuan has no say in this traditional criminal investigation method.

He thought for a while and said: "It will take a few days for the results of the trace physical evidence to be available. I want to go to the market to look at the shoes."

Huang Qiangmin understood immediately upon hearing this that Jiang Yuan wanted to find shoes that matched the footprints.

If it can be found, it will definitely help the case.

Huang Qiangmin also saw other footprint experts doing similar things, so he immediately agreed and said: "You should always follow people around you."

Jiang Yuan didn't refuse. He had to do things anyway, and the two of them could still chat all day long.