"Cross Cheng, the deceased's name is Luo Jiemin, 34 years old, is a self-employed person, and has a preliminary judgment that he died of poisoning."

"Um."

Cheng Guowei's eyes turned and saw a cup of leftover coffee on the table. A forensic doctor was extracting the residual liquid and preparing to take it back for testing to see which toxin it was.

But even without testing, Cheng Guowei could know that the deceased was hydrocyanic acid poisoning.

Because the first two victims also died of hydrocyanic acid.

When Cheng Guowei saw the deceased wife beside her, she was feeling a little broken and kept choking.

So he walked over and comforted him, "Please beg me, I have a few questions to know about you, what is your name?"

"My name is Lu Fei, please ask if you have any questions!"

Lu Xia wiped her tears and prepared to answer the police's questions.

"When did you find the dead?"

"I came back from my parents' house and suddenly saw him lying on the ground after opening the door. I thought he was drunk and fell asleep directly on the ground. So I went to call him, but he didn't react at all. I walked closer and saw that

I found out that he was dead, so I quickly called the police."

"How is your relationship with husband and wife?"

"It's pretty good. My husband is pretty good except for drinking."

"Have your husband been in contact with or having a dispute with others recently?"

"I didn't pay attention, he rarely lets me know about it."

"Then do you know Xu Lili and Cai Le?"

"No, don't know them, what's wrong with them?"

"Oh, it's okay!"

Cheng Guowei did not reveal too much about the two previous cases, but recorded a detailed confession to Lu Xia. As he expected, the clues were pitifully few.

This is a serial murder case.

Two weeks ago,

The police received a report from the hospital that a female patient was sent to the hospital for emergency treatment, and was finally declared dead by the doctor's rescue.

The doctor extracted a high concentration of hydrogen cyanate from his body, and suspected that the deceased died of hydrogen cyanate.

This is likely a criminal case.

The police immediately initiated the murder investigation procedure.

The deceased, female, 29 years old, Xu Lili, supermarket cashier.

As the husband of the deceased, Wang Can is suspected of committing the crime.

The reason why the police listed him as a key suspect was that he bought a million-dollar personal accident insurance for the deceased three years ago. Until the deceased died, the huge insurance was still in effect.

Wang Can has enough motives for murder: murder and fraud.

The police found the remaining drink residue of the deceased at the victim's home. After the samples were brought back, the forensic doctor also extracted hydrocyanic acid from it. The deceased was poisoned because he drank it.

The police conducted a comprehensive investigation of the victim's home, but found no traces of a third person appearing, and there were no signs of prying the doors and windows, which also aggravated the police's suspicion of Wang Can.

Cheng Guowei organized an investigation team to visit and investigate his neighbors and relatives, how does the relationship between the couple?

While summoning Wang Can to the detention center for inquiries, he refused to admit that he committed the crime and said that both the couple had bought accident insurance for each other, which was just to give each other a guarantee, and there was no subjective motivation to kill and cheat insurance.

Faced with this situation, Cheng Guowei also became suspicious. Is the investigation direction wrong?

If it weren't him, who was it?

For a moment, all the clues were cut off. As a last resort, the police could only focus on the deceased husband again and summoned him to assist in the investigation.

The neighbors around them also thought that the deceased was killed by her husband Wang Can. People were afraid of the words, and the three became tigers. Wang Can kept running to the public security bureau amid such rumors. The first thing was to find it.

The real murderer seeks justice for his wife and also clears himself of suspicion.

The case was once in a state of stagnation, and the police did not find sufficient evidence to prove that the deceased was killed by Wang Can.

Therefore, Cheng Guowei had to change direction. He personally led the team to start from the highly toxic substance of hydrogen cyanate, and arranged another group of investigators to investigate Xu Lili's social relations.

What channel did the murderer get the highly toxic compounds?

Once Wang Can found out that he had purchased perhydrocyanate, the evidence chain could be replenished, and he had no excuse to deny it.

In Liangbo police, nearly a thousand police officers were dispatched to investigate chemical enterprises of all sizes across the city and inquire about the outflow of such highly toxic substances.

However, the investigation results showed that no hydrogen cyanate was found to have been outflowed or lost.

This is very strange. If there is no hydrogen cyanoic acid flowing out, then how did the hydrogen cyanoic acid that the deceased eat come from?

The further the case is investigated, the more mysteries there will be.

At this time, Cheng Guowei got an important clue. He learned from a chemistry professor in a university that hydrocyanic acid does not need to be bought. People who know a little about chemical synthesis can easily extract it and extract it.

Raw materials can be purchased anywhere.

Is there such a thing?

Cheng Guowei suddenly became interested, and he continued to learn more about it:

Cyanide is common in the core of fruits, to be precise, cyanide glycoside, which can be hydrolyzed into hydrogen cyanic acid.

For example, use the apple core to extract hydrogen cyanide.

It sounds so scary. The small apple is actually highly toxic. Who dares to eat apples in the future?

In fact, there is no need to worry. The cyanoside content in apple seeds is very small, and humans are relatively large. If you are fed to small animals such as hamsters, you need to pay attention to seed removal, but for humans, even if you accidentally eat one or two pills.

Apple seeds won't cause poisoning.

Unless you eat a lot of chews, of course normal people won’t eat that.

What if it is not normal?

This discovery made Cheng Guowei immediately change the direction of the investigation and began to visit the surrounding fruit shops, asking if Wang Can had come here to buy a large amount of fruit.

At the same time, he investigated his education and working environment, as well as whether there are any related equipment used to extract poisons at home. Even the wall breaker at home was taken back to the technical department to test the residue inside.

With the continued investigation of the case, the police have not found a breakthrough.

The case has not been solved for a long time, and more than a week has passed in a blink of an eye. All Liang Bo's police officers have made great efforts, but there are few clues.

Until three days ago, the case turned around.

No, we can't talk about turning around, we can only talk about misfortune!

The second deceased appeared, and the deceased was still a woman named Cai Le, who was 29 years old and had the same cause of death as the previous victim.

The murderer's methods of committing the crime were consistent, and no valuable clues were left at the scene. Until now, Cheng Guowei didn't even know whether the murderer was a man or a woman.

He immediately investigated the two cases together, looking for common points between the two to judge the nature of the case.
Chapter completed!