Police Detective

When they arrived at the scene, Bai Song, Wang Huadong, and Sun Jie put on gloves, rubber hoods, and masks and entered the ruins.

The fire department used water cannons to extinguish the fire, and everything that was burned was destroyed beyond recognition. Most of the physical evidence at the scene and the deceased himself have been taken away by relevant departments.

The three of them looked at the remnants of the scene. Most of the flammable things were burned. Only some glass fragments, burned fruits, and some dregs after burning balloons were left. All other things had been taken away. gone.

"This is Inspector Bai of our team." Zhuang detachment introduced Bai Song to the leader of the criminal investigation detachment of Xijing branch.

"I've heard that I've admired his name for a long time, and he's really young." Detachment Liu here shook hands with Bai Song cordially, and pointed to a young man next to him: "This is Xiao Zhao, the criminal police officer in charge. Just ask him about the case. "

Bai Song shook hands, was polite, and had a preliminary understanding of the case. That is, the Xijing branch did not pay enough attention to it, thinking it was an accident, and the organizer was not the leader.

This made Bai Song a little puzzled. Why did detachment Zhuang come in person to do this?

After understanding some details from here, Bai Song planned to understand the matter clearly before going to see the physical evidence and witness, so he specifically asked Zhuang detachment what important details he was afraid of missing.

"This construction site is a key project, and the site here cannot be blocked for too long." Zhuang detachment said simply.

Bai Song nodded, understanding the reason why detachment Zhuang came, and then went to see the physical evidence and witnesses with everyone.

The cause of Yao's death was cardiac arrest caused by high-temperature burns - he had a bad heart.

"Who bought the balloon?" Bai Song asked.

"It was bought by the daughter of the deceased. Originally, the child wanted to spend his birthday with his father, but Yao wanted to go out for a drink, so the daughter bought a handful of balloons, then bought cakes and candles, and then went back to school." Interpol Xiao Zhao told Bai Song explained.

"How many balloons? What kind?" Bai Song asked.

"Almost twenty, the size of ordinary balloons."

"So little?" Bai Song said: "The explosion limit of hydrogen is 4% to 75.6%. It will not explode below this concentration. From the scene, this single room is about 11 square meters, 2.7 meters high, almost 30 cubic meters , at least 1.2 cubic meters of hydrogen is needed, and these 20 balloons only have 0.1 to 0.2 cubic meters of hydrogen, which is an order of magnitude difference, so why did they explode?"

"No way?" Xiao Zhao asked.

"What do you think?"

Xiao Zhao and the people around him also reacted to Bai Song's rhetorical question. I learned this stuff in junior high school or high school, so that seems to be the case.

Before, everyone suspected that the daughter who bought the balloon was suspected. In this case, hydrogen may not be the main cause of the accident at all.

This alone is enough to establish a case.

"Well," Xiao Zhao said, "I'm going to talk to the leader about this situation now."

"Don't worry." Bai Song shook his head: "Hydrogen balloons floating in the sky will not explode for no reason. Even if a few are broken and scattered near the roof, they cannot be ignited. I won't consider this issue for now. Let me ask. Where are you, the autopsy report of the deceased?”

When Sun Jie heard this, he immediately took a step forward and waited for the result.

"There are no results yet. There is only a tentative report. The autopsy is still in progress." Xiao Zhao thought for a while: "The cause of death should be heart disease caused by burns."

"Brother Jie, follow the people here and help." After Bai Song told Sun Jie, he looked at Xiao Zhao and said, "Please call someone else to take our forensic doctor to find out what's going on over there."

"Good leader." Xiao Zhao took out his mobile phone and made a call.

Taking advantage of this moment, Bai Song and Sun Jie asked, "Brother Jie, can burns cause heart disease?"

"If you have a history of heart disease, many external factors may cause heart disease." Sun Jie said: "However, the burn itself is not that easy to die. Even if the body is poured with oil, the human body can survive for a few minutes. Of course, after five minutes, , even if he was still alive at the time, he would not be able to recover."

"Does this person have a history of heart disease? Where are the medical records?" Bai Song then asked Xiao Zhao.

"Wait a minute, I'll ask"

Five minutes after arriving, someone came over with a case. Sun Jie looked at the case and followed this person to do the autopsy.

"Huadong, you go to the scene again, be careful and give you enough time." Bai Song did not say anything to the Huadong Tizhuang detachment, nor did he rush Wang Huadong.

After saying that, Bai Song then looked at Liu Shuyuan: "Captain Liu, if you are fine, go and help Wang Huadong."

"good."

Wang Liang watched the three people leave and looked at Bai Song helplessly.

Bai Song then looked at Xiao Zhao.

Xiao Zhao Moyuan felt a little guilty. He was the policeman handling the case who knew the most about this case, but why did he feel a little embarrassed when Detective Bai opened his mouth to ask.

"Detective Bai, if you have anything to ask, please ask." Xiao Zhao asked first.

"Is the video coverage of this place very good? Why was the video so sure before?" Bai Song was a little confused.

Before he came, he had heard that the video could confirm that no one had been near the house for some time before the deceased's death. Why was he so sure? Bai Song also looked around the rental house, and the camera couldn't guarantee there were no blind spots.

"That's right, Inspector Bai." Xiao Zhao finally had his own answer. "These places are where workers live. Because there have been several thefts in the past, in order to prevent similar situations from happening again, the There are many cameras, and they basically have no blind spots. The main reason is that they all use wide-angle cameras. From the surface of the camera, you feel that there are blind spots in some places, but in fact they do not exist.”

"Wide-angle camera? With infrared?" Wang Liang asked.

"Bring it." Xiao Zhao nodded affirmatively. He could also answer this question. It felt comfortable.

"Then how does this solve the problem of distortion in the images captured by the infrared wide-angle camera? Has the distortion been corrected?" Wang Liang asked.

"Ah?" Xiao Zhao's eyes widened and he felt bad.

What the hell?

"Captain Wang, if you have time, go and learn from their map investigation department." Bai Song said to Wang Liang.

"Okay." Wang Liang nodded and left.

"That's all I know, Inspector Bai. The materials are all here. Read it yourself. If you need anything to add, tell me and I'll find someone to check it out." Xiao Zhao didn't dare to ask him again if he didn't understand something.

"Okay." Bai Song said with a warm look on his face: "It's just a small case. Let's cooperate with each other and learn from each other. Well. I'll take a look at everyone's transcripts, including the deceased's children, several people who had dinner with him, all the deceased's subordinates, and his ex-wife. , bosses, other contractors and related suspicious personnel.”

"Only part of it, the rest haven't been found yet." Xiao Zhao almost knelt down: "Please look carefully at the records. If you have any questions, just tell me. I'll hold the notebook and I'll take notes."