Police Detective

After Bai Song told Zheng Yanwu this information, he felt very happy. If Old Zheng had a thought, he would be able to cheer up.

"Your first step now is to find a place to tidy up." Seeing that he was about to speak, Bai Song interrupted him directly: "If you don't want to go to the hotel, you can go to the bathhouse and change some clothes."

"Okay." Zheng Yanwu nodded heavily, "I will listen to you on this matter."

"Okay." Bai Song raised the corners of his mouth.

"By the way," Bai Song then asked, "You just said, were you the one who started the show before?"

"Well, chemical factories produce dyes. More than 10 years ago, almost 10% of the garment factories in the Pearl River Delta used my dyes." Zheng Yanwu didn't feel nostalgic when he said this. He no longer cares about these past things.

This really surprised Bai Song. Where is the Pearl River Delta? It is written in textbooks that it is the cradle of China's light industry. The garment industry in the Pearl River Delta Industrial Zone is a market worth hundreds of billions. With 10% of dyes, it is definitely a big factory.

"I didn't expect you to have such a past," Bai Song said with some admiration.

"It's already over." Zheng Yanwu took out two clean bowls and filled them with two bowls of stew: "Would you like to eat?"

"Eat", Bai Song took a bowl politely: "Old Zheng, you are an expert in chemical engineering. I want to ask you something, do you know about cyanide?"

"Cyanide? It's used to make dyes, but I'm not an engineer, so I don't know much about it. It's just that the anti-virus standard of that thing is high, so be careful when using it. The vehicles used for transportation are all special vehicles, and the price is very high. I know one thing better." The boss always focuses on price.

"Then if you think it would be difficult to get a little cyanide without using formal means?"

"Difficulty? It depends on how much you want." Zheng Yanwu said: "I haven't been in business for many years. I don't know the current situation. In the past, sometimes I couldn't get the purchase quota and approval, so I would find a colleague. It's a bit difficult to pay more to borrow a few cans. This thing is too big, but thirty or fifty tons is easier to get." Zheng Yanwu stuffed a large piece of stew into his mouth and inhaled when it was hot.

Zheng Yanwu's figure of thirty to fifty tons instantly grew taller in front of Bai Song.

"Isn't this illegal?" Bai Song suddenly realized that this thing was no joke.

"Yeah, so the price has to be increased." Zheng Yanwu didn't care about what happened more than ten years ago. "I don't know the current situation. The supervision should be much stricter now, but these things are all exchanges between qualified companies. Damn it, we were mostly fined if we were caught at that time, but I don’t know about it in recent years. By the way, why are you asking this?"

"I'm just curious." Bai Song didn't say anything else.

"Yeah, I understand." Zheng Yanwu didn't ask any more questions.

I have to say that Zheng Yanwu’s stewed meat was pretty good. Bai Song ate a bowl, told him about photography again, and left.

With nothing to do, Bai Song returned to the office and continued to sort out the case files of Sun's murder case. Only Wang Xu was in the office, and several other people were busy with other things.

During this period, several new clues emerged in the case of Sun's murder, but no one was arrested.

People's reactions during times of stress may be inaccurate. Similarly, sometimes when people are frightened, they are prone to memory problems or self-hypnosis in their minds, automatically making up some things into the way they imagined. Because of this, Recently, Wei Suo once again communicated with the neighbors of Sun's residence and obtained the transcript again.

This case has not been in the past for a long time, but there are discrepancies between the neighbor's records and the previous one. Of course, the earlier the transcript is obtained, the better, but the second transcript at this time cannot be said to be unnecessary.

The neighbor's second transcript pointed out that before the deceased's death, the quarrel in the room opposite did not last as long as previously stated, but actually only lasted three or four minutes.

Three or four minutes is actually not too short. When you hear a song you don’t like to listen to, it will be very difficult and difficult for you to finish listening to the song. Sometimes you will feel that time passes very slowly.

Through careful psychological counseling and comparison, the neighbor's final answer was that the quarrel in Sun's house only lasted for about four or five minutes, but the content of the quarrel was so confusing that the neighbor could not even remember a word, and the accent was from a foreign accent.

"Has the detailed autopsy report been released?" Bai Song asked Wang Xu.

"The copy was just delivered this morning. The original is over at Team 2. You can take a look at it. I took a general look and found that it is no different from what the forensic doctor said before." Wang Xu handed a stack of papers to Bai Song.

Bai Song took a deep breath and opened the autopsy report. Although Bai Song still resisted looking at these colorful pictures, they were much better. He read every picture and report content carefully.

"Why was hydrogen cyanide detected in the respiratory tract?" Bai Song asked doubtfully: "Didn't you say you were taking it before?"

"Inhaled?" Wang Xu didn't look at it so carefully. He took the case file in Bai Song's hand and took a look at it: "Did you write it wrong? Is it unrealistic to die by inhaling it?"

Although hydrogen cyanide can also be killed by inhalation through the respiratory tract, it is not realistic to use it for poisoning. Sun is a strong man anyway. Without trauma, he can still struggle for several minutes after inhaling hydrogen cyanide. , but there were no obvious signs of a fight at the scene.

"Oh oh oh, I didn't look carefully." Bai Song looked behind and realized that Sun indeed died from taking hydrogen cyanide liquid, but a certain concentration of hydrogen cyanide was detected in the respiratory tract.

"So, before drinking it, Mr. Sun smelled it first and then drank it?" Wang Xu was a little puzzled: "Doesn't this hydrogen cyanide taste like bitter almonds? How unpleasant it is, idiot. Only then can I drink it.”

"What you said makes sense. Could it be that Sun has a cold? Can't you smell anything?" Bai Song felt happy after saying this.

"It's really troublesome. If it continues like this, it won't be long before this case is set up as a special case. The murder case has not been solved for so long, and I guess the bureau will be restless," Wang Xu analyzed: " Once the telecom fraud case is over, the Ma detachment and the others will definitely have to keep an eye on this case every day."

"The main disadvantage of this case is that there is no video recording," Bai Song said. There are no video recordings in the community where Sun lives. Opposite is the bungalow where the bomb was last discovered. It is a blind spot for surveillance. "Bai Song glanced at the map drawn on the whiteboard. All the roads nearby have been checked, but no trace of these two people was found. It's really weird.