To talk about it, Wang Zixian is younger than Xie Jingchen.

After the disappearance of her younger brother Wang Zimu, Wang Zixian was determined to be a policeman, so after graduating from junior high school, she went to the police academy, and became a policeman after graduating from the police academy in five years.

After a few years as a policeman, he rushed to the front because of everything, made several merits, and was promoted to the captain of the detachment.

"She's the informant for RL?" Wang Zixian was startled, lowered her voice again, and pulled Xie Jingchen into the corner.

"Informant? Undercover? As far as I know, we've never been able to plant an undercover agent into RL, right?"

"It's not a ...... that was inserted," Xie Jingchen didn't know how to explain to Wang Zixian for a while, "We solved the cases at hand first, and these cases have nothing to do with RL, otherwise we wouldn't have been asked to be the task force."

When these are clarified, I will tell you about the other clues later."

Wang Zixian looked at him deeply, then nodded, and agreed.

Two armed police officers were transferred from the bureau to protect Fang Ling, and then Xie Jingchen and Wang Zixian separated, one went to the scene where Fang Ling was killed, and the other went to the previous crime site to check again.

Some murderers return to the scene after committing the crime.

This situation is usually due to two kinds of psychology, one is to return to the scene to confirm whether there are any key clues related to you, and the other is to observe the impact of your actions on society and obtain a perverted sense of satisfaction.

Normally, the two psychology work at the same time, just like people always like to look for stimulation, but after the stimulation is over, they are afraid. It's just that this kind of "stimulus" that criminals are looking for is more harmful to society.

The police guarded the scene of the crime, and there were also reasons to prevent the clues at the scene from being destroyed.

If the murderer returns to the scene and finds that Fang Ling is not dead, it is very likely that he will attack again.

This kind of person who goes specifically for the purpose of death is most likely to be a vendetta, and when she asked Fang Ling, her attitude also showed that there was a ninety percent probability of a vendetta.

Xie Jingchen remembered that An Ruqiao said that Zhou Yang said that he wanted to "take Fang Ling out", saying that on Fang Ling's head, the mysterious person who controlled the entire drug industry chain had a handle that could kill Fang Ling.

Fang Ling's secretive attitude...... Does it mean that the "enemy" she thinks of may be related to the bad things she has done in the past?

On the way to Fang Ling's house, Xie Jingchen followed clues one by one.

Feng Guanghua missed the stuffing before she died, and she knew about Lin Ruirui's death without being notified by the police.

Xie Jingchen made a hypothesis if the murderer who killed Feng Guanghua, Pei Chengjing, Lin Ruirui, Zhou Yang and the murderer who tried to kill Fang Ling were the same person......

What do these victims have in common?

Why did the murderer kill them?

Find common ground first. Pei Chengjing, Lin Ruirui, Zhou Yang and Fang Ling are all related to K City Pharmaceutical University, Feng Guanghua is Pei Chengjing's wife, she is not a graduate of Pharmaceutical University, nor does she work in Pharmaceutical University, but because of Pei Chengjing's relationship, it can barely be regarded as related to K City Pharmaceutical University.

If the key to the common denominator of the victims is the University of Pharmaceutical Sciences, the murderer is likely to be a person from the University of Pharmaceutical Sciences, and he knows and has a grudge against these victims.

According to the known conditions now, the suspects who know these victims at the same time are Su Ye and Li / Peng.

Judging from the clues gathered in various cases, the murderer, or one of the murderers, is a man between 175-185 tall, this characteristic Su Ye and Li / Peng both match, but they are not the kind of "one-word eyebrows" that Fang Ling said.

Li/Peng can be said to have a grudge against Zhou Yang and a motive for killing Fang Ling, but he and Pei Chengjing's family don't seem to have any grudges.

Xie Jingchen checked the chat records of Li/Peng's various social software, and also checked phone calls and text messages, Li/Peng and Lin Ruirui are ordinary lovers, extramarital affairs, one out of people, the other out of money. jj.br>

As for Pei Chengjing and his wife, Li/Peng and their biggest intersection, that is, the instructor of the innovation project they did when they were in school, filled in Pei Chengjing's name. After graduation, Li/Peng never contacted Pei Chengjing and his wife again.

Judging from the time of the crime, Li / Peng was under the noses of the police when Zhou Yang was killed, Li / Peng was in the hospital with his son when Feng Guanghua died and Fang Ling was attacked, and when Pei Chengjing and Lin Ruirui died, Li / Peng was on a business trip.

If it is said to be a purchase/murder, it is possible in terms of time, but when checking the flow of funds of Li/Peng, nothing abnormal was found.

Li/Peng's suspicion is very small and can be ruled out for the time being.

Another suspect, that is, Su Ye, is relatively suspicious.

At the time of Zhou Yang and Feng Guanghua's death, Su Ye had an alibi. Laboratory records show that Su Ye has been in the laboratory for the past few days and has never come out.

However, the possibility of Su Ye killing Lin Ruirui and Pei Chengjing cannot be ruled out.

According to An Ruqiao, Su Ye is Fang Ling's upline, and Su Ye left a large number of fingerprints in Professor Pei Chengjing's house, he is very familiar with Pei Chengjing's house, and he also has the key to Professor Pei's house.

The most important thing is that during Professor Pei Chengjing's lifetime, Su Ye had a lot of contact with him, and he was deeply trusted by Professor Pei, which harmed Professor Pei's chances of death, and also had the conditions to forge Professor Pei's call home.

According to the clues provided by An Ruqiao, it was Professor Pei Chengjing who guided Zhou Yang to join RL, so Professor Pei Chengjing may also have guided Su Ye to join RL.

At the same time, the drugs used for profit in the drug industry chain, such as reincarnation pills and beauty drugs, have been developed and improved by Professor Pei.

Su Ye has completely inherited the mantle of Professor Pei, and he is better than the blue in terms of drug research, if it is a conflict of interest, Su Ye does have a motive to kill Pei Chengjing.

Another common denominator that must be mentioned here is that they are all related to the drug industry chain.

Pei Chengjing is a key figure in the drug industry chain and a drug developer.

Zhou Yang participated in the R&D and distribution of "reincarnation pills" many years ago in the drug industry chain, and now he also knows about drugs in beauty shops, covering for Fang Ling.

In the pharmaceutical industry chain, Fang Ling is responsible for using beauty shops to connect with customers and sell "the latest beauty products" and supporting injections.

Lin Ruirui has a large number of capital inflow records, judging from Lin Ruirui's express delivery and receipt, as well as the investigation of Lin Ruirui's residence, it is very likely that Lin Ruirui is also a seller of drugs.

Feng Guanghua is Professor Pei's legal wife, and the two have been married for more than 20 years, and it is very likely that they also know about the drugs developed by Professor Pei.

Among the people known to be related to the drug industry chain, except for Su Ye, the others were either dead or injured. From the point of view of "related to the drug industry chain", Su Ye is either the murderer or the next victim.

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Seventy-eight Common Ground Free Reading.