Police Detective

"Detachment Zhuang, you Inspector Bai has something in your hands." Detachment Liu from Xijing Branch looked a little solemn: "Team Wang just told me that there is something really fishy in this case."

"If it was very simple, the corps wouldn't arrange for us to come over." Zhuang detachment had a sense of "Bai Song is mine" and said a little coldly: "After all, the corps leaders are well-informed."

"That's it." Detachment Liu took out a cigarette and handed one to Detachment Zhuang: "I hope there will be results soon."

In just half an hour, the person in charge of this case from the Xijing Criminal Investigation Detachment has changed from Xiao Zhao to the captain of the Second Brigade.

To characterize a case as an accident or suicide, all reasonable doubt must be eliminated.

But the fact that the balloon cannot reach the explosion limit is enough to attract attention.

Picture detection room.

"The situation just mentioned is also very simple. Generally speaking, the correct photography is a parallel perspective effect, that is, the horizontal lines converge together in the distance. This is not the case with this luminous wide-angle, and there will be obvious distortion. Operation It's also relatively simple. Cut out this image a few seconds before B explodes, then open the PS software, select Filter - Adaptive Wide Angle, and then set it to perspective. Then you need to add six constraint lines, so um, you still need Add a rotation constraint line, and then the rotation constraint line becomes vertical."

A group of detective detectives: ╮(╯▽╰)╭

Is this how PS software is used?

At the end of the operation, a repaired picture is created.

"Why is it a little crooked here?" someone with sharp eyes asked.

"That's the problem." Wang Liang pondered for a while and said, "We still need to take a few more screenshots to verify."

This camera has a frame rate of 25 frames, and the current software cannot intelligently repair the video. Wang Liang intercepted more than a dozen pictures from it, and found some distortions in all of them.

"What problem could this be..." Wang Liang pondered.

Seeing Wang Liang thinking deeply, everyone started thinking too.

…

"Could it be the air conditioner..." a new police officer asked weakly next to him.

"What nonsense are you talking about? Captain Wang is a computer expert, so stop talking." The deputy captain of the picture scout next to him patted the new policeman on the head.

"That's right, do you know who Captain Wang is? Why can't you see the outdoor unit of the air conditioner?" Another old detective educated.

Wang Liang gradually blushed...

Yes...it's caused by the outdoor unit of the air conditioner...

Generally, buildings are very large, and there is no need to consider things like air conditioners when drawing constraint lines. However, this house is not big. If an air conditioner outdoor unit is forgotten, it may easily become distorted.

After discovering the problem, Wang Liang subconsciously planned to use his own methods to fool him, then gave up the idea and looked at the new police officer, "What you said makes sense. This needs to be considered. How about you give it a try?"

"Captain Wang," the new police officer immediately shook his head: "I can't do it. I just like photography sometimes, and I'm just getting started."

"That's great." Wang Liang nodded, and then began to readjust the photo.

The detective captain chuckled and patted the new police officer on the shoulder.

The newly made photos were relatively normal. After Wang Liang took a few photos, everyone analyzed them together and found no problems.

"Do you still need to continue doing it?" the deputy captain of the detective asked.

"Let's pick a few more time periods. The method is not difficult. You can do it. I'll go to Inspector Bai to talk about the situation first." Wang Liang didn't feel very good, not because of what happened just now, but because he had learned from the past few days. I generally looked at the video and found that the effectiveness of the picture investigation in this case was not necessarily great.

Nowadays, some departments rely entirely on surveillance to handle cases. This is not advisable. Wang Liang knows that surveillance is not a panacea and many things are needed to handle cases. To put it more clearly, it relies on white pine.

"You mean, no one entered the house in advance to decorate it?" Bai Song thought a little after listening to Wang Liang's story.

"Well, except for the son and daughter of the deceased, no one has gone in." Wang Liang said with certainty: "There was also a person who passed by a few minutes before B exploded and looked inside."

"What did these two people bring?" Bai Song asked.

"The son brought a pack of cigarettes and two bottles of wine; the daughter brought a handful of balloons, a cake and two bottles of wine." Wang Liang said, "Look at the photo."

Bai Song looked at the photo carefully.

Because the weather is already very cold now and heating will be needed soon, Yao's son and daughter wear more clothes, but judging from their posture, there is nothing hidden inside.

The cake brought by daughter Yao Xin was still in a transparent box, so there didn't seem to be anything wrong with it.

The remains of the carton of cigarettes that my son brought with him were later found at the scene. It was indeed the state of the carton of cigarettes that was directly burned.

Because the fire did not last long, the smoke was not completely burned to ashes. Instead, the high-quality liquor brought by the children was burned to pieces by the fire, and the wine inside also played a role in supporting the combustion. Judging from the subsequent situation, Yao's Death has nothing to do with these drinks.

"So, why did B explode? What did it explode?" Wang Liang looked puzzled: "According to what you said, at least a few cubic meters of hydrogen are needed."

"Then it may not be the cause of hydrogen." Bai Song pondered for a while: "Let's wait and see Wang Huadong and Liu Shuyuan's on-site inspection."

After Wang Liang left, the graphic investigation department continued to check various video materials. Several people worked together, selected dozens of time periods, and corrected hundreds of pictures, but no problems were found.

This result was very depressing. Team Zhuang even came to the office here to ask Bai Song. Seeing Bai Song here reading the transcript, he didn't bother him.

Bai Song saw several valuable information from multiple transcripts.

First, several people testified that Yao was in arrears with wages. It was still three months before the Chinese New Year, but he had not yet paid the workers who had followed him for their previous work.

Generally, the contractor will always say that it will be settled at the end of the year, but once arrears occur, workers are not fools. Now, not every worker is a "waiting party", especially when their own vital interests are involved.

In the past month, Yao's workers have had many conflicts with him.

In addition, some people say that Yao's children are very kind to Yao, especially his son, who comes here basically every week. However, some people say that the son came to ask me for money.

The latter is supported by the fact that the police investigated his son Yao Lei's consumption records, which are indeed several times higher than those of ordinary college students and much higher than those of his daughter Yao Xin.

In addition, some people said that a few minutes before B exploded, he passed by the area and saw Yao looking at his mobile phone from the window, and the candle was still lit. Because both are bright, they are easy to spot.

In other words, B's explosion was not due to the sudden fire.