Chapter 315： data analysis

found it?

"Walk!"

In the conference room, Ren Hongfeng's subordinates brought back two videos.

"Team Chen," turned on the computer, and Ren Hongfeng asked his detectives to project the discovered video onto the screen.

"This is a video provided by the resident of Unit 101, Building 1, Building 1, Wanbao Residential Area, when we visited and surveyed the residents of the residential area."

"Because there is no surveillance in the community, their house is on the first floor. In order to prevent theft, a miniature camera is specially installed. The lens is facing the door of a unit... Look at the video taken on April 3."

Video playback.

The time is 12:28 pm.

The sky was dark, but with the dim light at the door of the unit, people could still be clearly seen in the surveillance.

A tall, white man with yellow hair crosses the camera.

The video is very short, and the picture of the man appearing in the camera is only two seconds short.

And the man under surveillance had only half of his face and was wearing a mask.

"In the five days after the crime, this was the only foreigner who appeared at the crime scene."

Ren Hongfeng opened another folder: "This is a picture taken by a speed camera on the road in front of the courtyard of the Evening News."

April 3rd at 12:23 pm.

On the projection is a photo.

A speed test photo of a taxi.

"Team Leader Chen, look at the position of the co-pilot."

The picture taken by the speed camera is very clear.

The yellow-haired man, wearing a mask, and the camera installed in Room 101, Unit 1, Building 1 of the Evening News Family Courtyard, photographed the white man alone.

There are not many foreigners in Panshi, especially Caucasians.

Although there is no evidence to directly prove that this white man with yellow hair and a mask is a foreigner who entered the house where Qin Liansheng died, but this video and photos are enough.

"The Caucasian appearance features in the video are very obvious, and we want to find this person in the shortest possible time."

Chen Yan knew that this person must be the key to unraveling the mystery of the case: "Check this taxi, it's not just three days since No. 3, and the driver will definitely have an impression on the foreign passengers."

"If the other party pays the taxi fare through WeChat and contacts the technical department, the information of this person can be found."

"Captain Qingshan, you are responsible for this matter."

"Also, the background investigation of Cui Xiaobing and Qin Liansheng needs to be sorted out again."

"I want all the information of these two people, family members, bank accounts, relatives and friends, etc."

"Lan Feng, you are responsible for this matter."

Turning his head, Chen Yan looked at Ren Hongfeng: "Captain Ren, how is the investigation of the food delivery track of Qin Liansheng and Cui Xiaobing?"

"It's still under investigation, and the results should be available tonight."

"it is good!"

Now Chen Yan has two clues in his hands.

First, the white man with yellow hair wearing a mask

Why did this person go to Qin Liansheng's rental house and look at Qin Liansheng and Cui Xiaobing's bedrooms.

How could two ordinary people who work in takeaways have anything to do with him, a foreigner.

The most important thing is that the other party showed that he knew that Qin Liansheng had died.

However, this case was not publicly reported, and even if the neighbors knew that someone had died, it was only circulated in a few nearby communities.

How did the yellow-haired foreigners know about it?

The second is Cui Xiaobing, who has been detained.

However, now is obviously not the time to interrogate Cui Xiaobing again, because Chen Yan has too little information.

When facing Cui Xiaobing, such poor information would make the interrogation meaningless.

Because you don't even know what the other party is going to do.

After the work was arranged, each group began to investigate overnight.

In the early morning of the next day, the detectives arranged by Ren Hongfeng brought back good news.

"Team Leader Chen, all the takeaway orders that Qin Liansheng and Cui Xiaobing have run over the past few years have been checked."

"We also found all their work trajectories."

Chen Yan, who had not slept all night, was shocked.

Why do you want to check the work trajectories of two people?

Because Chen Yan didn't believe that Qin Liansheng and Cui Xiaobing were really just ordinary deliverymen.

What kind of takeaway's home will be neat and spotless?

Don't tell others, Chen Yan can't do it himself.

So, with such good self-discipline, how can he be just a deliveryman?

Turn on the computer, connect the projector, and two tables appear.

"This is all the takeaway orders they have taken in the past five years."

Five years, such a long time span, there are as many as tens of thousands of data in the two tables.

Open another folder, it is the movement track of the two people.

This is the movement trajectory of the two people when picking up orders obtained by the technical department of the market detective team contacting the food delivery platform.

"This trajectory data is not complete. The data three years ago have not been archived, and the trajectory data of the two years are only part of it."

On the screen, there were numerous screenshots, which dazzled everyone.

Everyone, looking at the mess on the screen, was a little puzzled.

"Team Leader Chen, these data...that's what ordinary delivery people do."

"Everyone is the same, right?"

Chen Yan nodded, these data are indeed ordinary running water data.

However, if there is an unknown story behind the two people, then it is impossible for them to really deliver food.

Of course, it is impossible to analyze from the current data.

"Give me the data," Chen Yan put away the data hard drive and looked at Ren Hongfeng: "Ren team, please give me a separate office and a computer."

"This is no problem," Ren Hongfeng nodded affirmatively: "I have an empty office next door, and the computers in it are also newly configured."

……

Locking himself in the office, Chen Yan began to face the data.

When investigating the case of the US-Japan International Hospital, the system once rewarded Chen Yan with a skill.

Computer programming expertise.

For a long time, the cases that Chen Yan encountered basically did not use this skill much.

Today, it finally comes in handy.

Some of the trajectory data, as well as the information in the table, all have tens of thousands of pieces of data.

Just by looking at it with the naked eye and analyzing it, it is impossible to discover the hidden laws inside.

What Chen Yan has to do now is to analyze from these messy data whether Qin Liansheng and Cui Xiaobing have any fixed customer groups for takeaways in the past five years.

If so, who is it, what do they buy, and where did they buy it.

The industry of takeaways is a hard job.

But when it comes to treatment, it's actually not low.

This is an industry where as long as you work hard, your income can reach the upper-middle level.

However, the wear and tear on the body is relatively large, and it is difficult for ordinary people to adapt to the high-intensity delivery work for a long time However, Qin Liansheng and Cui Xiaobing have worked for five years.

Of course, Qin's winning streak was longer.

So, there is a doubt here, haven't Qin Liansheng and Cui Xiaobing ever thought about changing careers?

You can't do takeaway food all your life.

The sound of tapping on the keyboard was linked together, and Chen Yan was writing a program by himself to analyze the data.

The first is to classify all the takeaway dishes of the two people in the past five years.

Then connect the origin and destination of the take-out order, and combine the two people's existing action trajectories to simulate all their take-out order trajectories.

In this way, where the two of them have been, which takeaway shop they have picked up business from, and who they have given things to, they are all clear.

However, even with system-rewarded computer programming expertise, it takes time.

After all, the amount of data processed is too large.

While Chen Yan was processing the data and analyzing it, Liu Qingshan, Lan Feng and others were also working non-stop.

At three o'clock in the afternoon, Liu Qingshan was the first to return.

At four o'clock in the afternoon, Lan Feng also returned to the market detective team.

All the information gathered together.