Police Detective

4-1-603, Donghua Garden, Nanfeng Road, J County.

"Officer, please drink some water." Lao He smiled, holding an old teapot in one hand and two cups in the other. The cups were still dripping with water.

"Don't be in a hurry. Sit down. It's... um, it's past 11 o'clock. Let's continue chatting." Liu Shuyuan looked at his watch.

It's already past eleven o'clock in the evening. Liu Shuyuan came here after six o'clock this evening and has been here for five hours. This was also the first time that the owner of the house served the two of them with water, and his tone was much more relaxed.

"Police officer, how about tomorrow? You have been here for two days. I have to go to school early tomorrow morning to send my grandson to school."

"Lao He, I have to settle down with you today." Liu Shuyuan sighed: "The Li family is a family of five, and their bones are not yet cold."

"But..." Lao He was a little anxious, "Why are you telling me all this? Oh, officer, tell me, why are you always forcing me to do this?"

"I just said, we can't wait until tomorrow." Sun Jie also nodded firmly, giving Lao He a psychological hint that he would never give up.

"Lao He, we have known each other for two days." Liu Shuyuan took out a piece of paper and put it on the table: "Did you know that your grandson has been bullied three times in school recently and was beaten five days ago?"

"What?!" Lao He was worried: "Who did it?"

After saying that, Lao He immediately thought that his grandson had indeed returned injured five days ago, but he said he had fallen.

"Tell me who you are and what are you going to do?" Liu Shuyuan said seriously: "On the back of this paper is the situation of the people who bullied your grandson. Do you want to read it?"

"I" Lao He was held there.

Lao He's children died in a car accident a few years ago, leaving only one grandson, who is now in primary school. Due to family reasons, his grandson was always bullied at school, but every time he asked, he would not tell him.

The case in J County has been arrested.

The suspect is the prospective son-in-law of the deceased's family.

The cause of death was the issue of bride price.

The family named Li, that is, the family of the deceased, is a local farmer and requires a huge amount of bride price.

The murderer was the boyfriend of the dead daughter of the Li family. Now, except for the youngest son who is still alive, everyone else in the Li family is gone.

To put it simply, when it was time to talk about marriage, the man also gave the betrothal money, but in the end, the woman asked for a very high bride price.

Province A is not a big province in terms of betrothal gifts, but it does cost a lot, 188,888 yuan.

In a place like J County, by 2015 standards, most families would not exceed 100,000 yuan. The man prepared 80,000 yuan, but it turned out to be far from enough.

The money itself is actually nothing, but the woman feels that the man's family can provide more money, so she changes her mind temporarily.

The most important thing is that the woman originally said well, but when it came to the final discussion, she turned against her and ignored her years of relationship and completely obeyed her parents.

The man is really cold-hearted. The relationship that has lasted for many years has suddenly changed because of this.

If the bride price is a stumbling block, the girlfriend's attitude is like a knife stabbed by her companions.

It's as if two people went up a mountain and encountered a tiger. Instead of helping, their companion stabbed him to save his life. Companions are more hateful than tigers.

The man is also a college student from a prestigious university!

However, people nowadays don't care about what you can do in the future, they just want the results now.

Three questions to ask when getting married: "Do you own a house?" "Do you own a car?" "Do you have savings?"

It doesn’t matter how much you earn now or what your future will be like, just ask about deposits. What the hell is this?

The man was helpless and refused to get married. He asked for the return of the deposit of 10,000 yuan and gold jewelry, but the woman refused to return the money.

For a moment, Ren thought more and more and became angrier. He couldn't bear it anymore, so he came up with a trick. He used some of his authority in the school laboratory to get a small amount of cyanide, and then poisoned the locusts.

Regarding this issue, Liu Shuyuan specifically asked several biology doctors on the way to J County to determine the basic cause of locust toxicity.

Current research has found that gregarious locusts, under high-density stimulation, cause a gene to convert phenylalanine into phenylacetaldehyde oxime, which is rapidly hydrolyzed into phenylacetonitrile.

Phenyl acetonitrile is an olfactory warning signal, and the natural enemies of locusts are disgusted by the smell. And if a natural enemy insists on eating it, phenylacetonitrile will be converted into highly toxic hydrocyanic acid. As a result, birds may be poisoned if they eat it.

The mechanism of action of cyanide is very broad. It is afraid of any creature that has a cellular structure in the body and needs mitochondria to provide energy, and locusts themselves are no exception. Therefore, the concentration of cyanide is not as high as expected. After being fried at high temperature, part of it volatilizes. Poisoning a family of five is unlikely.

Moreover, the hydrocyanic acid produced by locusts evaporates in real time, and there is not much left in the locusts' bodies. If they want to eat a person to death, they usually have to eat several kilograms.

It’s meaningless to talk about toxicity apart from the dosage. Apples and other plants of the Rosaceae family, such as apple seeds, also contain cyanide. But if you want to eat dead people, you have to eat a ton of apple seeds continuously. Tomatoes actually have a certain amount of cyanide. Toxic, you only need to eat four tons at one time to become poisonous~

As the autopsy progressed, forensic doctors gradually discovered that the cause of death was cyanide poisoning, a level of poisoning that even poisonous locusts could not achieve.

Therefore, the local police quickly carried out relevant work.

However, before the cause of death was announced, Liu Shuyuan started the operation in advance because he was well prepared in the preliminary work and arrested the suspect immediately.

At this moment, the evidence chain is still short of a closed loop.

No one knows where the suspect bought the locusts from, or how they were delivered. In this closed loop, there is an eyewitness, Lao He, but Lao He is unwilling to testify.

"He" Lao He's voice was a little low: "At school, someone bullied my grandson. Won't someone stand up and help?"

"Perhaps, many people are as indifferent as you. Maybe they know what justice is, but they cherish themselves too much and hide behind when things happen. That's why they are like this." Liu Shuyuan sighed.

Lao He was silent for a few seconds and then lowered his head: "Officer, let's go."

"Okay." Liu Shuyuan turned around and said as he was about to go out, "I have already solved your grandson's matter."

Liu Shuyuan's words seemed to have a magical power, and Lao He believed them immediately.

What he was afraid of was not the murderer, but the man who sold the locusts. To succeed in this case, one person is not enough. The suspect also bribed a locust seller and tricked him into selling cheap and poisonous locusts to the deceased's family.

Now, the buyer is dead, and Lao He has also sold locusts in the market in the past few days. Moreover, he knows a family surnamed Li. They were from the same village before his children died. Later, his son and daughter died. In order for the children to go to school, he bought a six-story house in the county with the compensation money and accompanied his grandson to and from school.

There are a lot of locusts selling in the market recently. He is the only one who knows the family surnamed Li.

"Officer, sit down and drink a glass of water. Oh."