"Captain Zhuang, your Chief Inspector Bai has something in his hand." Captain Liu of Xijing Branch said solemnly, "Captain Wang just told me that there is something fishy about this case."
"If it was simple, the headquarters wouldn't have arranged for us to come here." Team Zhuang had a sense of "Bai Song is my man" and was a little arrogant: "After all, the leaders of the headquarters are knowledgeable."
"That's right." Team Leader Liu took out a cigarette and handed one to Team Leader Zhuang: "I hope there will be results soon."
…
In just half an hour, the person in charge of this case in the Xijing Criminal Investigation Detachment had changed from Xiao Zhao to the captain of the second brigade.
To classify a case as an accident or suicide, all reasonable doubts must be eliminated.
But the fact that the balloon does not reach the explosion limit is enough to attract attention.
…
Image Detective Room.
"The situation I just mentioned is also very simple. Generally speaking, the correct camera has a parallel perspective effect, that is, the horizontal lines converge together in the distance... But this night light wide-angle is not like this, there will be obvious distortion. The operation is also relatively simple. Take the image a few seconds before the explosion, then open the PS software, select Filter-Adaptive Wide Angle, and then set it to Perspective. Then you need to add... um... six constraint lines, so... um, you also need to add rotation constraint lines, and then... the rotation constraint lines are in a vertical state..."
A group of detectives: ╮（╯▽╰）╭
Is this how PS software is used?
The operation is completed and a repaired picture is produced.
"Why is it a little crooked here?" someone asked with sharp eyes.
"That's the problem," Wang Liang pondered for a while and said, "We need to take a few more pictures to verify it."
This camera has a 25-frame frame rate, and current software cannot intelligently repair videos. Wang Liang captured more than a dozen pictures and found that they were all distorted to a certain extent.
"What kind of problem could this be..." Wang Liang pondered.
Seeing Wang Liang in deep thought, everyone started to think too.
…
"Could it be because of the air conditioning..." a new police officer nearby asked weakly.
"What nonsense are you talking about? Captain Wang is a computer expert, so stop talking." The deputy captain of the image detection team next to him patted the new policeman on the head.
"That's right, do you know who Captain Wang is? How come he can't see the air conditioner outdoor unit?" another veteran criminal police officer educated.
Wang Liang gradually blushed...
Yes...it was caused by the outdoor unit of the air conditioner...
Most buildings are large, so there is no need to consider things like air conditioners when drawing constraint lines. However, this house is not that big, and if you forget to include an air conditioner outdoor unit, it is likely to be distorted.
After discovering the problem, Wang Liang subconsciously planned to use his own methods to fool the problem, but then he gave up the idea and looked at the new police officer. "What you said makes sense. This needs to be considered. How about you try it?"
"Captain Wang," the new police officer immediately shook his head, "I can't do that. I just like photography sometimes, and I'm just getting started."
"That's great too." Wang Liang nodded and began to readjust the photos.
The captain of the picture detection team chuckled and patted the new police officer on the shoulder.
The re-edited photos were relatively normal. After Wang Liang took a few, everyone analyzed them together and didn't find any problems.
"Do we need to continue?" asked the deputy captain of the image reconnaissance team.
"Let's pick a few more time periods. The method is not difficult. You guys do it. I'll go find Inspector Bai to talk about the situation first." Wang Liang didn't feel very good. It wasn't because of what happened just now, but because he had roughly reviewed the videos from the past few days and realized that the effect of graphic investigation might not be that great in this case.
Some departments now rely entirely on surveillance to handle cases, which is not advisable. Wang Liang knows that surveillance is not omnipotent and handling cases requires many things. To put it more clearly, it depends on Bai Song.
…
"You mean, no one went into the house to prepare it in advance?" Bai Song was a little confused after listening to Wang Liang's story.
"Well, except for the deceased's son and daughter, no one else has been inside." Wang Liang said with certainty: "There was also another person who passed by a few minutes before the explosion and looked inside."
"What did these two people bring?" Bai Song asked.
"My son brought a pack of cigarettes and two bottles of wine; my daughter brought a bunch of balloons, a cake and two bottles of wine." Wang Liang said, "Take a look at the photos."
Bai Song looked at the photo carefully.
Because the weather is already very cold and the heating will be turned on soon, Yao's son and daughter are wearing more clothes, but judging from their bodies, they don't seem to be hiding anything inside.
The cake that my daughter Yao Xin brought was in a transparent box, and there didn’t seem to be anything wrong with it.
The remains of the cigarette that my son brought with him were later found at the scene. It was indeed the result of a whole cigarette being burned.
Because the fire did not last long, the smoke was not completely burned to ashes. Instead, the bottles of strong liquor brought by the children were burned by the flames, and the liquor inside also served to aid combustion. Judging from subsequent developments, Yao's death had nothing to do with the liquor.
"So, why did the explosion happen? What exploded?" Wang Liang looked puzzled. "According to what you said, it would take at least several cubic meters of hydrogen."
"Then it may not be the hydrogen." Bai Song pondered for a while and said, "Let's wait and see Wang Huadong and Liu Shuyuan's on-site inspection."
…
After Wang Liang left, the image detection department continued to check various video materials. Many people worked together, selected dozens of time periods, and corrected hundreds of pictures, but still no problems were found.
This result was very discouraging. Captain Zhuang even came to the office here specifically to ask Bai Song, but when he saw Bai Song reading the transcript here, he did not disturb him.
Bai Song saw some valuable information from multiple transcripts.
First of all, several people testified that Yao had been in arrears with wages. Now there are still three months to the Chinese New Year, but he has not yet paid the workers who followed him for their previous job.
Generally, contractors always say that the payment will be made at the end of the year, but once there is arrears, the workers are not fools. Now not every worker is a “wait and see” party, especially when it comes to their own vital interests.
In the past month, Yao's workers have had many conflicts with him.
In addition, some people said that Yao's children were very kind to him, especially his son, who came almost every week. However, some people said that his son came to ask for money.
The latter is supported by evidence that the police investigated the son Yao Lei's spending records, which were 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 the explosion, they passed by the area and saw Yao looking at his mobile phone through the window, and the candle was still lit. Because both of them were bright, it was easy to be discovered.
In other words, the explosion was not caused by a sudden fire.
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