Take the old attack to solve the case

Wang County is a very small place, but its total population is 30 million. The chances of these five girls being admitted to higher vocational colleges from several different schools, not only classmates but also relatives are zero, at least very small. But they happened to be relatives within three generations.

However, when Zhang Zimu questioned the family members of the victim last night, no one mentioned the relationship between them. Until Zhong Yiyan went to investigate their kinship relationship today, a neighbor of the deceased Li Qing's family accidentally mentioned that before I once saw several other girls come to visit relatives, and I realized that they were actually relatives.It's a pity that the neighbors of these girls don't know the relationship between these families. They only know that these families used to be relatives, and then they didn't know when, and suddenly they didn't see each other again.

"Relatives" may be the most magical relationship in the world. When it is good, it is a relative, and when it is not, it is an enemy.

"Why don't you ask the victim's family directly?" Sun Liang asked.

"Of course I asked. Fang Juan woke up in the morning and asked when Jiajie went, but everyone said in unison that 'it's just a common relationship'. Even Chen Xuanli and Fang Juan said that. You said it was Isn't it a bit strange?" Zhong Yiyan frowned.

"What are they trying to hide?" Sun Liang couldn't help but frowned.

Zhong Yiyan nodded and said, "I always feel that what they want to hide must be related to this case."

The two of them turned their heads to look at Huang Dahong who was beside them.

Huang Dahong was eavesdropping, and suddenly saw two criminal policemen looking at him together, he was startled, and wanted to run reflexively.

"What are you running for?" Zhong Yiyan grabbed him back with a good look.

"Hey, I'm used to it, I just got used to it." Huang Dahong also felt quite embarrassed. After being a thief for so many years, it has become instinctive for the police to run away when they see him.

……

After coming out of the hospital, Sun Liang and Huang Dahong immediately went to the condiment wholesale point in the farmer's market.

This wholesale point is also engaged in retail business, and the owner did not know at all who came to buy seasonings containing nitrites. Put it on the shelf for sale.

"Do you know this thing is poisonous?" Sun Liang didn't know how to express his anger.

"Police officer, the higher-ups also came to check, and they didn't say anything, that is, they can be sold. Those that cannot be sold, I will not put them on the shelf. Those are all inside, and not everyone can buy them." Fat The fat shopkeeper smiled kindly and didn't care at all.

Sun Liang looked at the shopkeeper and was speechless for a long time, so he silently took a sample of all the products containing nitrite and brought them back.

Huang Dahong accepted Zhong Yiyan's "entrustment" and went to investigate the relationship of the five families.

Sun Liang looked at Huang Dahong's back, moved his mouth but didn't say anything. Although the police are not allowed to find "informants", in order to solve the case, many policemen have their own informants, especially the anti-narcotics team Over there, not only informants but also undercover agents are often dispatched, otherwise the source of the drugs would not be found at all.

Besides, Huang Dahong can't be regarded as a professional informant now.

……

At the case analysis meeting at five o'clock in the afternoon, Pan Qingyue stood up first.

"I compared the sample brought back by Sun Liang with the nitrite in the salt jar. It is very similar to the salt packaged with 'sodium nitrite', but there are still some subtle differences in the middle." Pan Qingyue said on the screen Bring up a photo.

"What's the difference?" Zhang Zimu asked.

"The purity is slightly different." Pan Qingyue replied.

Zhou Qingcheng said beside him, "Could it be the same batch of products?"

Sun Liang raised his hand and said, "I asked the boss, this batch of nitrite arrived three months ago, but they also sold the same manufacturer before, and they have sold the same manufacturer's nitrite for five or six years. "

After Zhang Zimu finished speaking, he turned his head to look at forensic doctor Zhan Xinyi, and said, "How are you doing?"

What Zhang Zimu said was about the autopsy. The family members of the two deceased did not agree to the autopsy. Although they could take compulsory measures, they could not ignore the emotions of the family members. Zhan Xinyi had to use a needle to extract some samples for testing.

Zhan Xinyi looked tired. Doing this kind of pharmacological and pathological test is very time-consuming and exhausting. She has hardly slept since yesterday. When she stood up, she accidentally tripped over a chair. Fortunately, Li Cancan next to her gave her a hand.

"After testing, the two deceased should not have consumed nitrite for a long time before. In other words, this poisoning is the first time."

Zhang Zimu frowned. If the murderer bought nitrite at the farmer's market, why didn't he use it before, but did it after three months?

"It's also possible that I didn't buy it in a store, but bought it online." Cui Xiaoyu said.

Now almost everything can be bought online, from guns to drugs, to all kinds of knives, poisons...almost all criminal supplies can be purchased.Just like the murder case they solved before, the knife used by the murderer was bought from the Internet, because it was handcrafted, and the knife edge was very special, which made them search for a long time before finding the murderer.

Zhang Zimu knocked on the table with his fingers and said, "It seems that we can no longer find clues from the source of the poisonous salt. We must expand the scope of investigation."

When Zhong Yiyan heard this, he hurriedly winked at Sun Liang. Sun Liang looked at him suspiciously, not knowing what he meant. Zhong Yiyan glanced at Zhang Zimu, and continued to wink at Sun Liang.

"Zhong Yiyan! What's wrong with your eyes? Do you want to go to the hospital?! It's a meeting now!" Zhou Qingcheng couldn't see it.

Zhong Yiyan was taken aback, and hurriedly sat upright, and said, "Captain, the family relationship of these five girls is very complicated."

In order to secure his future "career", Huang Dahong was very concerned about the task Zhong Yiyan gave him, and one of his subordinates happened to be from Wang County, so he inquired about something in just one afternoon.

There is a big Liu family in Wang County, which is the original family of Liu Moping, who is still in a coma.The Liu family has a large population. There are more than 600 adult men who participate in ancestor worship every year. The Liu family village below Wang County is almost all members of this family.

The mothers of the dead Song Jiya and Li Qing, and the awakened Chen Xuanli were all from the Liu family. Fang Juan’s grandmother was also from the Liu family.

Liu Moping’s family moved to Wangxian County due to business, but in the early years, they went back to Liujia Village every year to worship their ancestors, and often walked around with the other four families, but in recent years, they hardly went back to Liujia Village, and did not communicate with relatives , There were even rumors among the neighbors that Liu Moping's family seemed to be moving to another place.

However, when the family members of the victims were asked about these circumstances, they did not disclose a word.

Zhang Zimu took a look at Zhong Yiyan and said, "It just so happens that Sun Liang's investigation has been completed, and you and Sun Liang are responsible for the family relationship of the victim's family."

"Yes, Captain!"

Zhang Zimu looked at Cui Xiaoyu and asked, "What's the situation at the school?"

Cui Xiaoyu said: "According to the victim's classmates, the five girls have a very good relationship, they are almost inseparable, and they rarely communicate with other students in school, not to mention enemies, they have no friends, and they rarely participate Activities in the class, especially Song Jiya and Liu Moping, almost never talk to others, and some students can't even tell them apart until this time."

Although this kind of situation is rare, such things as personality vary from person to person. Some people don't like to communicate with others, and it's not surprising that they are so severe that they suffer from autism.

"Where's Liu Moping's boyfriend?" Zhang Zimu asked.

Cui Xiaoyu said: "Liu Moping's ex-boyfriend Li Zhong is the owner of a live broadcast website. The two met on the Internet. Liu Moping's family is relatively rich. She gave Li Zhong more than 5 yuan on the live broadcast website. Li Zhong went to the Higher Vocational College to meet Liu Moping.

The two of them have known each other for almost half a year. Although Liu Moping is very generous in terms of money, she is very conservative in terms of sex. She not only refuses to sleep with him, but also refuses to even kiss him. This makes Li Zhong very angry, and the two quarrel because of this separate.

Li Zhong said that Liu Moping would bring at least one person with him every time she went on a date, most of the time it was Song Jiya, sometimes it was Li Qing, Fang Juan, or Chen Xuanli, and no matter who she brought, they would just sit on the table. Looking at the two of them without saying a word, it was like finding someone to monitor. "

Everyone has a look of disbelief. Although there are very few people in the criminal police team who have a partner, most of them have had a love experience once or twice when they were students. It is normal to be conservative and refuse to go to bed. I am afraid of contagion. It's understandable to be sick and refuse to kiss, but when you go out on a date, you bring a classmate to spy on you... How worried about your boyfriend can you do it?

The two women, Cui Xiaoyu and Li Cancan, thought that it would be good to bring a companion when meeting a "boyfriend" they met online. I didn't see a girl meeting a male netizen a while ago, but was raped?Maybe Liu Moping did it just to be on the safe side.

It's a pity that Liu Moping has never been awake. The doctor even said that she might become a vegetable and never wake up again.

However, after investigation by Cui Xiaoyu and the others, Li Zhong seldom went out recently, and occasionally went out with the live broadcast on. The possibility of him committing crimes is extremely low.

……

Poisoning cases are the most difficult cases to solve. The poisonous salt used in this case comes from a wide range of sources, and the school dormitory is a place with a large number of people. It is very difficult to solve this case.

Zhang Zimu saw that some people had begun to show a look of burnout, so he couldn't help but said: "To solve a case, you have to go step by step. Even if the detection is blocked, you can only stand still and not stop, otherwise you may never lift up again." Sorry about that foot."

"Captain, what should we do now? Can we only check with the relatives of the victim?"

"When there are no clues, check from the beginning! Zoom in on every detail and re-look, twice if it doesn't work once, and three times if it doesn't work twice, until we find the clues we missed!"