After Bai Song finished telling Zheng Yanwu this information, he was very happy in his heart, if Lao Zheng had a thought, he would be able to cheer up.

"Your first step now is to find a place to take care of yourself", Bai Song saw that he was about to speak, and directly interrupted him: "If you don't want to go to the hotel, you can go to the bathhouse and change some clothes or something." ”

"Good. Zheng Yanwu nodded heavily, "I listen to you about this." ”

"Good. The corners of Bai Song's mouth rose.

"That's right", Bai Song then asked, "You just said that you opened before?"

"Well, chemical factories, producing dyes, 10 years ago, almost 1 percent of the garment factories in the Pearl River Delta used my dyes. When Zheng Yanwu said this, he didn't have any nostalgic feelings, and he didn't care about these past things anymore.

That's the cradle of China's light industry and the garment industry in the Pearl River Delta Industrial Zone, which is a market of hundreds of billions of dollars, and a percentage of dyes, and it's definitely a big factory.

"I didn't expect you to have this kind of past," Bai Song said with some admiration.

"It's all long gone. Zheng Yanwu took out two bowls that looked very clean, and filled two bowls of stew: "Do you want to eat it?"

"Eat", Bai Song unceremoniously took a bowl: "Lao Zheng, you are an expert in chemical industry, I ask you something, do you know about cyanide?"

"Cyanide can be used as a dye, but I'm not an engineer, so I don't know much about it, but the anti-virus standard of that thing is high, and I am very careful when using it, and the car that is transported every time is a special vehicle, and the price is very high, which I know better." "The owner always focuses on the price.

"Then how difficult do you think it is to get a little cyanide without using formal means?"

"How difficult it is, it depends on how much you want", Zheng Yanwu said: "Now 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 quota and approval to buy, so I asked my peers to add money to borrow a few cans, this thing is too large It is indeed a bit difficult, but thirty or fifty tons is still relatively easy to get." Zheng Yanwu stuffed a large piece of stew into his mouth, and he hissed and inhaled.

Thirty or fifty tons... Zheng Yanwu's figure instantly became tall in front of Bai Song.

"Isn't this illegal..."Bai Song suddenly thought that this thing was not a joke.

"yes, that's why you have to increase the price. 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 this thing is a mutual dismantling between qualified companies, and we were caught at that time and were mostly fined, I don't know about it in the past few years." By the way, why are you asking this?"

"Curious. Bai Song didn't say anything else.

"Well, I understand. Zheng Yanwu didn't ask anything more.

I have to say that Zheng Yanwu's stewed meat is still 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 file of Sun's murder, only Wang Xu was in the office, and several other people were busy with other things.

During this time, there were a few new clues in the case of Sun's murder, but no one was caught.

In the same way, sometimes people are frightened, and they are prone to memory problems or self-hypnosis in their minds, and they automatically make up some things into their own imaginations.

This case has not been long, but the neighbor's transcript is different from before. Of course, the sooner the transcript is taken, the better, but the second transcript at this time must not be said to be unnecessary.

The neighbor's second transcript pointed out that before the deceased's death, the quarrel in the opposite room was not as long as previously stated, in fact, it was only three or four minutes.

Three or four minutes is actually not too short, when you hear a song that you don't like to listen to, it is very difficult and difficult for you to listen to the song, and sometimes you will feel that time flies very slowly.

Through careful psychological dredging and comparison, the neighbor's final answer was that in Sun's house, there was only about four or five minutes of quarrel, but the content of the quarrel was extremely chaotic, and the neighbor couldn't even remember a word, and the accent was a foreign accent.

"Is the detailed autopsy report out?" Bai Song asked Wang Xu.

"The copy that was just delivered in the morning, the original is on the side of the second team, you can take a look, I took a general look, and there is no difference from what the forensic doctor said before. Wang Xu handed a stack of rolls to Bai Song.

Bai Song took a deep breath and opened the autopsy report. Although Bai Song was still very resistant to these colorful pictures, he was much better, and he carefully read every photo and the content of the report.

"Why is hydrogen cyanide detected in the respiratory tract?" Bai Song asked suspiciously, "Didn't you say you took it before?"

"Inhalation?" Wang Xu didn't look at it so carefully, and took a look at the case file in Bai Song's hand: "It's wrong, right?

Although hydrogen cyanide can also be inhaled through the respiratory tract and killed, it is not unrealistic to use it for poisoning, Sun is also a strong man anyway, without external injuries, he can struggle for a few minutes by inhaling hydrogen cyanide, but there is no obvious trace of a fight at the scene.

"Oh oh oh, I don't look carefully", Bai Song saw the back and found that Sun did die from taking hydrogen cyanide liquid, but a certain concentration of hydrogen cyanide was detected in the respiratory tract.

"So, before drinking it, this Sun first smelled it, and then drank it?" Wang Xu was a little puzzled: "Doesn't this hydrogen cyanide taste bitter almonds? ”

"What you said makes sense, or maybe Sun has a cold, and his nose can't smell it?"

"It's really troublesome, and if it continues to develop like this, it won't be long before this case should be set up. The murder case has not been solved for so long, and it is estimated that the bureau should not be able to sit still", Wang Xu analyzed: "When the telecom fraud case is hot, the horse detachment will definitely have to stare at this case every day." ”

"In this case, the loss is due to the lack of video", Bai Song said, there is no video in the community where Sun lives, and the opposite side is the bungalow where the bomb was found last time, and it is all a blind spot for surveillance. Bai Song glanced at the map drawn on the whiteboard, and the roads around here had been checked, but there was no trace of these two people, which was really evil.