Detective: Open your eyes, I am handcuffed in the interrogation room

"Zhuge Cong, do you have any opinion on this case?"

Chen Yi directly named them. Each of the four provincial and department officials, including Xia Lan, had their own advantages. Compared with each other, only Zhuge Cong could give a reasonable personal inference at the moment after reading the dossier.

He should have this ability.

With a double master's degree and a major in psychology, he is definitely better than Fu Guoyong and Cheng Hanjun in analyzing problems.

Several people looked at Zhuge Cong, who stopped being humble and said: "Among the four suspects, the most suspected one seems to be Zhao Jianhui. The last meal he had with the victim was actually quite strange."

"Judging from the inquiry records and chat records, Zhao Jianhui met with Gao Xiaofei many times but failed to do so. He finally achieved his goal in exchange for not harassing her after eating the meal. The motive and preparation for committing the crime are relatively reasonable."

"However, considering the conditions of the crime, I think it is unlikely that Zhao Jianhui is the murderer in this case. He does not have the opportunity to poison."

"So, I still tend to be more suspicious of the victim's roommate and his boyfriend."

There is nothing wrong with what he said. Zhuge Cong’s inference focused on the conditions for committing the crime. Not to mention the small probability of clever poisoning techniques. Those who have perfect poisoning conditions are Gao Xiaofei’s roommate and boyfriend. They are together almost all day, and there are many opportunities. .

On the other hand, Zhao Jianhui is just a suitor, and it is unlikely that he will come into contact with Gao Xiaofei's vitamins.

Chen Yi did not comment and looked at Cheng Hanjun and Fu Guoyong: "What do you think?"

Cheng Hanjun stretched out his hand to Zhuge Cong: "Give me the cigarette and I'll smoke one."

"ah?"

Zhuge Cong was surprised, why didn't you slap me?

"Stop talking nonsense, give it to me." Cheng Hanjun repeated.

Zhuge Cong took out the cigarette case and handed it over.

After taking it, Cheng Hanjun turned sideways and took out one cigarette from the cigarette box, then returned the cigarette box to Zhuge Cong and said at the same time: "How many cigarettes are there in total?"

Zhuge Cong was confused: "How did I know this?"

Cheng Hanjun chuckled: "You don't know, right? I just put three poisonous cigarettes in it. As long as you get it, you will be poisoned to death."

Zhuge Cong frowned slightly, and Cheng Hanjun used a simple practice to restore possible poisoning methods.

The murderer asked Gao Xiaofei for vitamins and put three poisons in them while taking them. There are many people who can do this, including Zhao Jianhui. Anyone who knows Gao Xiaofei may be a poisoner.

Vitamins are food, and food should be hygienic. There is a high possibility that Gao Xiaofei would hand the bottle directly to the suspect without using her own hands.

After a slight silence, Zhuge Cong said: "What I just said is a high probability. The poisoning methods are diverse. This is for sure. The murderer has not been caught yet. The difficulty is that it is difficult to leave traces during the poisoning process."

Fu Guoyong never interrupted. Compared with the two of them, thinking analysis is his weakness. It would be embarrassing if he said something wrong.

Chen Yi put out his cigarette, with no expression on his face. He turned to look at Qin Fei and Lin Chen: "Where are you guys? What do you think?"

Qin Fei wanted to listen more and talk less. Faced with Chen Yi's active inquiry at this moment, he said: "I have a question, why are there three poisons in the bottle? Is this number intentional or unintentional?"

"What do you mean?" Zheng Congliang began to ask after hearing this.

Qin Fei: "I mean, one poison is enough. You will eat it sooner or later anyway. Why put three pills? Isn't it a bit strange?"

Zheng Congliang didn't react.

Is there any difference?

Chen Yi: "Why do you think it is?"

Qin Fei: "If it was intentional, the purpose was to let the police find out that the poison came from the bottle containing vitamins."

Chen Yi: "Continue."

Qin Fei: "Uh..."

He couldn't continue. Normally, suspects in homicide cases would always think about how to cover up the method of killing, so no one would take the initiative to tell the police. What's more, forensic doctors can also find out the type of poison, so it seems unnecessary.

Seeing this, Chen Yi spoke: "What Qin Fei said just now is right. The three poisons may have been intentional. Assuming that the suspect did it intentionally, the purpose is to let the police find out and confirm that the poison came from the bottle containing vitamins."

"We can see from the surveillance and autopsy results that the victim Gao Xiaofei took two vitamins, one of which was poisonous. The normal dosage of vitamins is one to three. This is no problem. Two pills may be Gao Xiaofei's personal habit. "

"Then, three poisons are the safest. Even if Gao Xiaofei was unlucky and two of them were poisonous, there would still be one left in the bottle to help the police pinpoint the direction of the poisoning investigation. No matter where Gao Xiaofei died of poisoning, no matter when If it is discovered, it will ensure that there is still one in the bottle.”

help? ?

This word is very special, and everyone present has doubts in their hearts.

Chen Yi continued: "All the suspect's unreasonable actions are actually to get away from guilt and to disrupt the direction of the police investigation. If the purpose of the three poisons is to help the police lock in the poisoning line, then the real situation may not be Poisoning, or the real cause of Gao Xiaofei’s death, had nothing to do with those two vitamins.”

After listening to Chen Yi's words, Zheng Congliang couldn't help but said: "Team Chen, but the autopsy showed that Gao Xiaofei did die of poisoning, and the poison was indeed trivalent arsenic in the bottle."

Chen Yi turned around: "Now let's brainstorm the doubts and analyze them slowly. Gao Xiaofei did die from trivalent arsenic poisoning, and there was indeed poison in the bottle. So it doesn't make sense that the suspect helped the police pinpoint the direction of the poisoning. This matter You can let it go first. As for why Qin Fei proposed three pills, there may be no underlying reason. The suspect can only support three pills. "

"Now I want to talk about another situation, Zheng Zhi, didn't the forensic doctor in the bureau mention it to you? Vitamin C and pentavalent arsenic can undergo a chemical reaction to turn into trivalent arsenic."

Zheng Congliang wondered: "Pentavalent arsenic?"

This was beyond his knowledge.

Chen Yi: "The food with the highest concentration of pentavalent arsenic is seafood, especially shrimp."

Zheng Congliang's expression changed slightly. He immediately remembered the surveillance at the seafood buffet. It was to investigate whether Zhao Jianhui had committed poisoning. He watched it many times in person.

Gao Xiaofei ate a lot of lobster, and Zhao Jianhui got a lot of it.

"real or fake?"

Zheng Congliang already understood what Chen Yi wanted to say. Did Zhao Jianhui mean it?

Qin Fei, Zhuge Cong and others were equally surprised. They quickly took out their mobile phones to search and found that this was indeed the case.

Vitamin C and pentavalent arsenic will synthesize trivalent arsenic. Doctors emphasize that when eating seafood, you should try to avoid taking vitamins, otherwise there is a risk of poisoning.

Does Zhao Jianhui know about this?

If he knew, then he knew that Gao Xiaofei often took vitamin C, so when they last met, he deliberately took Gao Xiaofei to the seafood buffet restaurant, deliberately took a lot of lobsters, and used chemical reactions to quietly poison Gao Xiaofei.

Where's the bottle of poison? Is it related to Zhao Jianhui?

Is it possible that Zhao Jianhui poisoned himself? He threw three pills in order to disrupt the direction of the police investigation and let the police focus on investigating the poisoner. Since the poison came from a vitamin bottle, it is naturally impossible for the investigators to focus on other places, but they can be deceived. Pass.

No, no, no...

Isn't this unnecessary?

Since the poisoning has been successfully carried out in a very secretive manner, is it necessary to stage this scene again?

It's not necessary at all. It's superfluous and increases the risk of exposure.

Or just poison.

Or, just eat seafood.

Why go to all that trouble? ?

In a few short seconds, everyone thought a lot. Chen Yi spoke at the right time: "Don't think it's complicated. Gao Xiaofei's death has nothing to do with seafood. The reaction between the two to form trivalent arsenic requires a lot of vitamin C, at least five tablets, and The consequences are just poisoning, not death.”

"Gao Xiaofei only eats two slices at a time, so it's not a big problem."

"The reason why I raise this point is to make you think about a question: Did Zhao Jianhui know that the victim cannot eat vitamins and seafood at the same time?"

Zhuge Cong: "If he knew... what did he want to do? Revenge? Revenge against Gao Xiaofei for not choosing him? After all, after chasing her for two years, I must feel very uncomfortable watching Gao Xiaofei and her boyfriend holding hands every day."

Zheng Congliang frowned deeply and said, "Is there another level? Then Zhao Jianhui is suspected of intentional injury, but as long as he doesn't admit it, we have no evidence."

Chen Yi: "If he knew, he was not the poisoner. If he didn't know, it would be hard to tell."

Zheng Congliang kept up with Chen Yi's investigation rhythm. The thinking of young people and their old detectives are different. They like to analyze possibilities from multiple aspects, find the most reasonable points, and then conduct targeted investigations.

The old detective is more accustomed to step by step, using traditional criminal investigation methods to break out the cocoon and slowly move forward.

Each has its own advantages and disadvantages, depending on the nature of the case.

As far as this case is concerned, Chen Yi seems to want to use... the elimination method.

The few people discussed for half an hour, and Chen Yi said: "I will go to Suicheng University and meet the people I need to meet again. Zheng Zhi doesn't need to follow me. The other work in the team has been arranged. I will spend the next few days." , let’s go through the whole case again.”

Zheng Congliang nodded: "Okay."

…

The research team left the city bureau and came to Suicheng University. This place is known as the largest university in Dongzhou. In addition to investigating the case, several people wanted to come and take a look.

Zhao Jianhui was at the West Campus, and the vehicle parked directly at the west gate.

After identifying yourself, the security guard let you go.

Zhao Jianhui's phone number didn't get through. It happened to be class time, maybe it was muted, and get out of class was about to end.

Zhao Jianhui's information was written very clearly in the file, including the dormitory number. Chen Yi and his party crossed the campus and came to the downstairs of the boys' dormitory to wait.

The school spirit of Suicheng University is a bit weird. The weird thing is the bold moves between couples. Chen Yi even saw a boy put his hand into his girlfriend's clothes.

It's summer, brother, you can see it very clearly, why don't you go get a room, it's unseemly.

Xia Lan, the only woman among the seven, also saw it and was very embarrassed. She deliberately pretended not to see it and silently packed the things in her briefcase.

"Universities are so open now."

Zhuge Cong's words were clearly stated. Xia Lan's body froze and she continued to lower her head to organize.

Cheng Hanjun said calmly: "It's normal."

Zhuge Cong: "Is it normal?"

Fu Guoyong: "Normal."

"..." Zhuge Cong glanced at the two of them, "What have you two experienced in college? You have seen your own shadow, right?"

Fu Guoyong glared: "Don't talk nonsense, we are in the police academy, I should ask you about this."

Zhuge Cong: "Our university is not like this. It is obviously normal as you say. What does Qin Fei think?"

He turned to look at Qin Fei, who quickly said that he also graduated from the police academy.

He looked at Lin Chen again. Lin Chen just smiled politely and then immediately shifted his gaze, not wanting to respond to such a boring question.

Chen Yi stood at the front and seemed not to hear the chatter of several people. He looked at the passing students and thought about Gao Xiaofei's death.

Judging from big data, poisoning is generally a common action for women to commit murder. It may be a preliminary action or a final resort.

If it is a pre-action, drugs such as sleeping pills will be used to make the victim comatose and then kill. This is difficult to achieve on a university campus.

It can only be a last resort.

If we only look at the probability without considering other factors, Gao Xiaofei's roommate is extremely suspicious.

The conflicts between girls are much more exaggerated than those between boys. The latter will not commit a crime unless the conflict is very serious. If you are really anxious, the most they can do is scold you and beat you up. Everyone in the police station will not accept anyone, but the former... as long as... It's a big deal if something happens, and the motivation is often very speechless.

One is emotional and the other is relatively rational.

Campus cases in recent years include intentional injury, theft, etc., and a large proportion of both victims and suspects are women.

What does it mean to be ruthless and don't talk much? Chen Yi has seen a lot of them.

On the surface, he looks soft and quiet, but in fact he is more vicious than men. Otherwise, he is the most poisonous to women.

"If it's her, we need to start with the source of the poison."

While thinking, Chen Yi looked not far away. Six people were walking side by side, and Zhao Jianhui was inside.

There are exactly six people in a room in the boys' dormitory.

The distance between the two parties was getting closer and closer. Zhao Jianhui, who was wearing white short sleeves and black shorts, soon saw Chen Yi and the others and slowed down.

After confirming that the other party was coming for him, Zhao Jianhui stopped on the spot.

Chen Yi walked over.

Zhao Jianhui was stunned for two seconds, then decisively turned around and left in the opposite direction, getting faster and faster, almost running.

Fu Guoyong immediately chased after him, catching up with him within thirty meters, and then brought him back like a chicken.

"Why are you running away?" Fu Guoyong asked coldly.

Zhao Jianhui said with a sad face: "I didn't run away. I suddenly remembered something happened. Comrade police, what happened? It's not because of Gao Xiaofei, right?"

Chen Yi looked at each other: "How do you know we are the police?"

Zhao Jianhui: "I'm used to it...looking at the special look."

Seeing that the situation was not good, the five people in the dormitory decided to run away without saying much. They seemed to be used to it.

A year ago, Zhao Jianhui obviously had a lot of dealings with the police.

Chen Yi waved his hand: "Let's go and find a place to chat."

Zhao Jianhui: "Can you not go?"

Chen Yi: "What do you think?"

Zhao Jianhui said helplessly: "Okay... You guys are very familiar to each other. I didn't even meet you last year."

Chen Yi: "We are from the provincial department."

Zhao Jianhui was startled: "Huh?!"