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

The questioning continued. Chen Yi stayed with Qian Changdong much longer than Zhao Jianhui. Lovers are one of the most private relationships, and they will know the secrets that others do not know.

Friends and family may not know these secrets.

The Suicheng police had already dug a lot into Qian Changdong last year, and Chen Yi wanted to try to dig up more, especially Gao Xiaofei's early experiences.

This direction was a weak point in the investigation. The Suicheng police focused most of their energy on Gao Xiaofei's situation in recent years and did not investigate Gao Xiaofei's past in depth.

If all the four suspects we currently have are eliminated, then the foreseeable new direction must be to investigate further, starting from childhood.

Chen Yi needs to be prepared in advance. There is a possibility that the murderer is other than the currently known suspects.

The police cannot have a God's perspective. All they can do is cover the situation as comprehensively as possible to find the only breakthrough.

"She was quite rebellious when she was in junior high school," Qian Changdong said.

Chen Yi: "What kind of rebellion?"

This information is in the file, but it was not learned through Qian Changdong, but through Gao Xiaofei's cousin.

Qian Changdong: "Just...smoking, drinking, fighting, and staying up late at night. At that time, her academic performance was very poor and she was at the bottom of the class. Later, there was a fire and accident at home. She grew up overnight, and this started I studied hard and was admitted to Suicheng University.”

Suicheng University is a second-tier school. It’s not bad for a troubled girl to be admitted to the second-tier university.

Dongzhou is a major college entrance examination province with fierce competition. It is very difficult to get into the key points. Thousands of troops cross the single-plank bridge. If it is in a small place, undergraduates will be the "number one".

Chen Yi thought for a moment and asked, "Did her friends at that time still keep in touch?"

Qian Changdong: "She probably lost contact. I haven't heard her say anything about her. I think her interpersonal relationships are quite simple, with college classmates and relatives."

Chen Yi: "How did you talk about her cousin Shi Yiqing?"

Suicheng police listed Gao Xiaofei's cousin Shi Yiqing as one of the suspects at that time, which was the first information they obtained from Qian Changdong. They then visited Gao Xiaofei's other relatives and determined that the two had conflicts and often quarreled.

The point of conflict between the two was Gao Xiaofei's father, Shi Yiqing's uncle.

When Gao Xiaofei was in junior high school, the relationship between father and daughter was very bad because of her rebellious behavior. Shi Yiqing had a good relationship with Gao Xiaofei's father. As time went by, Shi Yiqing became more and more disgusted with Gao Xiaofei.

To normal people, Gao Xiaofei was an anomaly. None of her relatives liked her very much. No one said anything to her face. Only Shi Yiqing dared to point her nose and scold her.

After the fire, the only family ties between Shi Yiqing and Gao Xiaofei were the elderly at home: Shi Yiqing's grandmother and Gao Xiaofei's grandmother.

After investigation, Shi Yiqing admitted that she hated Gao Xiaofei very much. Even if Gao Xiaofei later completed her studies and went to college, nothing changed.

The prodigal son turned back at the cost of his family's death. This was not worthy of forgiveness in Shi Yiqing's opinion. She even said that the person who died in the fire should be Gao Xiaofei. God was blind.

The dramatic thing is that Shi Yiqing is also studying at Suicheng University and is one level lower than Gao Xiaofei. They had a lot of quarrels and conflicts when they met, so Suicheng police listed Shi Yiqing as one of the suspects.

To be honest, the motivation is the same as Gao Xiaofei's roommate, which is far-fetched.

There's nothing we can do about it, we really can't find anyone with reasonable motives.

Qian Changdong replied: "One time Xiao Fei was in a bad mood. I asked her what was wrong. She said she had a fight with her cousin again. We are all in the same school and we still meet occasionally."

The conversation between the two lasted for more than an hour. During this period, Chen Yi had been observing the detailed changes in Qian Changdong's expression. He talked a lot about Gao Xiaofei, including what the Suicheng police had learned about last year. He repeated it again and got a completely consistent answer. .

It is basically certain that the other party did not lie.

The two were just ordinary college lovers, with no conflicts or disputes over interests. Although Qian Changdong had relatively sufficient conditions to commit the crime, he had no motive for committing the crime.

After Qian Changdong left, Chen Yi asked Qin Fei to call Shi Yiqing and learned that the other party was in the library, so he immediately went there and met Shi Yiqing who was studying.

It was not convenient to chat in the library, so they found a nearby milk tea shop on campus with tables outside the door.

Shi Yiqing is preparing for the postgraduate entrance examination. She seems to be a girl who loves learning and is motivated.

"I've said it many times. I'm not sad at all when she dies. I'm even a little happy, but I didn't kill her. I'm not that brave."

Shi Yiqing drank milk tea and spoke first without waiting for questions.

Last year, the police conducted an investigation and evidence collection against her for a long time, which had a great impact on a college student.

Chen Yi leaned on the chair, looked at Shi Yiqing and said, "We want to believe that you didn't do it. After a year, is there any new information that can be provided?"

Shi Yiqing shook her head: "No, everything I know has been told. Besides, my relationship with her is very poor and I don't know much."

Chen Yi: "How is the relationship between her grandma and her?"

Shi Yiqing was stunned for a moment: "Huh?"

When the police investigated last year, they did not ask about my grandmother.

Chen Yi: "Gao Xiaofei was a troubled girl when she was a child. Her relatives had a bad impression of her. I think her grandmother should be included in this, right? After the fire, everyone in the family died and only Gao Xiaofei was left. The most painful one must be her grandmother. ”

Shi Yiqing was silent for a moment, then hesitantly said: "You...you won't suspect that it's my grandma, right? It's absolutely impossible. Gao Xiaofei is her only relative."

Chen Yi: "You are overthinking. I didn't doubt her. It was just a casual chat."

"Oh..." Shi Yiqing's expression softened slightly, "How should I put it, the relationship between my grandma and Gao Xiaofei is just like that. Before my uncle and cousin died, Gao Xiaofei received very little attention. After the fire, Gao Xiaofei was my grandma. The only consolation is that it has been difficult for her for so many years.”

Chen Yi: "Be specific. For example, did you beat or scold Gao Xiaofei?"

Shi Yiqing: "Probably not. Anyway, I haven't seen her. Grandma has been a little depressed in recent years. We often go back to see her."

Chen Yi: "How often?"

Shi Yiqing: "About once a month."

Chen Yi: "Every time you go back, what is your grandma's attitude towards Gao Xiaofei?"

Shi Yiqing thought for a while and said: "She is very indifferent. Since the fire, she has been very indifferent to everyone, including me. In fact, I am a little lucky that Gao Xiaofei is still alive, otherwise grandma may not be able to think about it."

Chen Yi nodded slightly. If the whole family died, no old man could bear it.

"You just said that Gao Xiaofei received little attention when she was a child. Does that mean your uncle and aunt were not good to Gao Xiaofei?" he asked.

Shi Yiqing: "Not really. After Gao Xiaofei entered junior high school, she hung out with the underachievers in the class. My uncle and aunt must have been very disappointed, but after all, she is my daughter. I hate that iron can't turn into steel."

Chen Yi: "Have you ever done anything?"

Shi Yiqing: "I heard that she was moved. Gao Xiaofei dared to stay up at night. My uncle beat her, but it was of no use. She still went her own way. One time, she was so angry that she almost got hospitalized."

Mentioning this matter, Shi Yiqing opened up the conversation: "After the fire, Gao Xiaofei grew up overnight, became honest, and loved to study, but what's the use? Her uncle and the others are dead. Even if she gets admitted to God City University, her uncle Can’t see it either.”

Chen Yi silently listened to Shi Yiqing's "complaints". When they first met, Shi Yiqing gave him the impression that Shi Yiqing was a very straightforward girl who said whatever she wanted, at least he didn't find any flaws.

After that, he chatted with the other party about the visit to Gao Xiaofei's house the day before the crime. He asked in detail, from the time he entered to leaving, what he did, what he said, whether he entered and left Gao Xiaofei's room, etc.

These issues need to be discussed again with Gao Xiaofei’s grandmother.

The Suicheng police have already investigated, but there is definitely a difference between a year ago and now. If there were lies at that time, there is still a high possibility that the lies will be exposed a year later.

True memories are always true, while false memories become confused over time.

After the three people's questioning was over, Chen Yi and others left Suicheng University and drove to Lin Kaiyue's home.

This is the last one.

Lin Kaiyue has just graduated and has not yet found a job. She is currently unemployed at home.

When the police came to visit, Lin Kaiyue's parents showed great resistance, but they had no choice. Who would let their daughter have a conflict with the murder victim? The police investigation would not end until the murderer was caught.

The two asked to accompany their daughter for questioning, and Chen Yi agreed.

In the living room, Lin Kaiyue's mother brought tea out of courtesy. Chen Yi thanked her and began to get to know Lin Kaiyue.

In fact, the questions that should be asked are all in the file. The main reason for revisiting the suspect is to understand more intuitively and to find the suspicious points through the changes in expressions.

The most important thing is to discover whether there are any inconsistencies in the confessions.

Different police officers will definitely get different results when facing the same interview subject, especially police officers who understand psychology and micro-expression analysis.

Lin Kaiyue was obviously a little bored, but after learning that the other party was from the provincial department, she immediately became more honest and answered whatever was asked.

Like Shi Yiqing, Lin Kaiyue did not shy away from her dislike of Gao Xiaofei. Under Chen Yi's guidance, she revealed many of Gao Xiaofei's shortcomings.

For example, irritability.

For example, they like to preach and pretend to be mature.

For example, a violent maniac.

Being violent is a bit exaggerated. Gao Xiaofei has never hit anyone, but her experience in junior high school has left her with a cynical nature. When she encounters something she doesn't like, she doesn't hide it, but directly attacks and threatens to do it.

Therefore, other people in the dormitory were somewhat afraid of Gao Xiaofei, and Lin Kaiyue was not a light-hearted person. She had many conflicts with Gao Xiaofei in the past three or four years, and even got into trouble with the counselor, and almost changed dormitories. .

Although the dormitory was not changed in the end, the tension between the two did not diminish at all, and they never had a good mood when they met. Fortunately, they were both locals and could go home often, so they could barely tolerate it.

Among the four, Lin Kaiyue's motive for committing the crime was relatively reasonable, but the investigators found no doubts or clues about Lin Kaiyue.

Trivalent arsenic cannot be created out of thin air, which is a big problem.

An hour later, several people left the community.

At the gate of the community, Chen Yi lit a cigarette and asked Zhuge Cong what they thought.

All four suspects have been met.

Zhuge Cong was the first to speak: "I really don't feel any problem. It's been a year. The details and files of certain things are correct. I personally don't think they lied."

Chen Yi looked at the others.

Qin Fei: "I don't think they lied. Maybe the murderer is not among these four people?"

Chen Yi exhaled a puff of smoke: "Don't jump to conclusions easily. We just met once and still need to continue investigating. We have to believe in Zheng Congliang's investigative ability. There must be very reasonable motives and conditions for deliberate poisoning. The suspicions of these four people are indeed is the biggest.”

"But there is another issue that we cannot ignore. To be precise, it is a person, that is the victim's grandmother."

Hearing this, Zhuge Cong said: "Does Captain Chen suspect the victim's grandmother?"

He was thinking about this issue when he asked Shi Yiqing just now. From the perspective of the conditions for committing the crime, the victim's grandmother was also questionable, but it didn't make sense ethically.

That is the only relative.

The rest of the people also looked at Chen Yi, doubting everything was the basic quality of a criminal police officer. No matter what the relationship between this person and the victim was, it was still okay to at least discuss it.

Chen Yi: "Let's put suspicion aside. If we think about it carefully, Gao Xiaofei actually experienced three poisonings. The first was chronic iron poisoning, the second was a reaction between seafood and vitamins, and the third was fatal trivalent arsenic."

"The seafood reaction came from Zhao Jianhui, and the deadly poison came from the murderer. So what about chronic iron poisoning? Is it possible that it is also man-made?"

After everyone thought about it, Zhuge Cong was the one who responded fastest: "Chronic iron poisoning is caused by long-term use of iron supplements or a long-term high-iron diet. The person most likely to do this is her grandmother."

Chen Yi nodded: "Yes, if it is really man-made, her grandmother is very suspicious. As for the motive... I can also guess, for example, to anger Gao Xiaofei because of the death of her son and grandson."

Qin Fei said: "Captain Chen, does this have something to do with Gao Xiaofei's murder?"

Chen Yi: "Maybe it's related, maybe it's not."

Qin Fei was surprised: "What do you mean?"

Chen Yi took a puff of cigarette and said: "The key point in checking backlog cases is whether there are any people who have been ignored. The investigation of this case has been very comprehensive. We have all met the suspects just now. To be honest, I have not found any doubts. "

"In this case, we will temporarily shift our focus from the four people and focus on Grandma Gao Xiaofei, who has the best conditions to commit the crime."

"Now I'm going to make a hypothesis. Assume that the murderer is Gao Xiaofei's grandmother. What do you think her motives are?"

Several people fell silent, this assumption was quite bold.