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

A university doctorate professor who taught and educated people, an engineer of students' souls, was brutally killed in the suburbs. This was a big loss to Jiangcheng, Dongzhou, and even the whole country.

Who knows, if Cao Yuning had not been killed, how many graduate students and doctoral degrees could be trained in the future?

"It's really a pity." He Xin also sighed: "If you follow the logic of vendetta, it doesn't look like Cao Yuning can make enemies with others, and he was still studying for graduate school ten years ago, right?"

Chen Yi and Zhao Qiming didn't speak anymore.

Now we don’t know what is going on in this case, everything is just speculation.

All that can be done is to collect as many clues as possible step by step, and then try to make inferences based on the collected clues to determine the more likely direction.

Soon, Cao Yuning's home arrived, and several people knocked on the door.

After waiting for a while, the door opened, and several people's eyes moved down at the same time. Standing in front of them was a five or six-year-old boy.

The little boy blinked his big innocent eyes and said in a childish voice: "Uncle, who are you looking for?"

Chen Yi's eyes fluctuated and he smiled and said, "We are looking for your mother. Is she there?"

Hearing this, the little boy turned around and ran to the living room, shouting: "Mom, there are some uncles outside looking for you."

"Let them in."

From the sofa in the living room, a weak female voice came from, with a hint of hoarseness.

"Uncle, you guys, come in!"

"Thanks."

Chen Yi and others stepped in and closed the door. At the same time, the woman's voice sounded again: "Tongtong, you go to the bedroom and close the door to play for a while. Mom will give you the phone."

The boy was overjoyed and happily took the phone, then jumped out of the living room. Then there was the sound of the bedroom door closing.

Chen Yi walked to the living room and saw a woman in her thirties with a beautiful face, half lying on the sofa. She seemed to have lost all her strength and kept rubbing her forehead.

When the woman looked over, Chen Yi could see the redness and swelling in her eyes, as well as the despair, sadness, and confusion about the future in her eyes.

"Mrs. Cao, excuse me."

Chen Yi tried his best to keep his tone as calm as possible.

It was a perfect family, but now her husband has died, leaving behind a lonely wife and a newly sensible son. For Mrs. Cao, this will be the darkest moment in her life.

Fortunately, I have children who care about me, which is a ray of comfort in the darkness and a source of courage to continue living a good life.

The boy still doesn't know what happened, and he doesn't know how long he can hide it.

You can tell the other party that your father is on a business trip in one or two years, but it will be difficult to fool him in three, four, or ten years. By then, it will be a second injury to Mrs. Cao.

"Police, right? Sit down."

Mrs. Cao was still rubbing her forehead, as if she wanted to relieve her grief, but this method obviously couldn't be useful. She just didn't want to let herself be idle and didn't want to stop.

Several people sat down.

"Has the murderer been caught?" Mrs. Cao asked.

Hearing this, Zhao Qiming and others looked at each other in shock. This was only the third day, or the second day to be precise.

Chen Yi said: "Not yet, so I hope Mrs. Cao can calm down for a while and answer our questions. Maybe your casual words can be of great help to us in tracking down the murderer."

"Please believe that our desire to catch the murderer is the same as yours."

He didn't say anything about condolences or understanding your mood. For the wife who had just learned of her husband's death, this kind of pale comfort sounded no different from standing up and talking without pain in the back.

Hearing this, Mrs. Cao stopped rubbing her forehead, turned to look at Chen Yi, and then sat upright on the sofa.

"You are the police officer responsible for this case," she asked.

Chen Yi nodded: "Yes."

Mrs. Cao was silent for a while and said, "I'll get you a glass of water."

Chen Yi said quickly: "No need, Mrs. Cao, let's get straight to the point."

Mrs. Cao: "Okay, you can ask."

Chen Yi: "Before this, can my colleagues be allowed to visit Cao Yuning's room and study?"

Mrs. Cao raised her hand and pointed: "Okay, over there, go ahead."

Chen Yi turned his head and looked at Zhuo Yun and Qin Fei. The two nodded in understanding, got up and left the living room.

At this time, there were only three people left in the living room. Chen Yi asked the first key question: "Does Cao Yuning have any enemies?"

Regarding this matter, Mrs. Cao answered simply: "Absolutely not."

Chen Yi: "Is there any problem in the relationship between him and his students?"

This question was very direct and sharp, causing Mrs. Cao to frown, and then said firmly: "Absolutely not, I promise, don't waste time in this direction."

"Yuning and I met when we were graduate students. We were each our first loves."

"He has a good tutor and a well-educated family, including me, so he will never do the immoral things you mentioned."

"And we communicate with each other on mobile phones and so on. We have never found any suspicious contacts or chat records. He rarely goes out alone."

Hearing this, Chen Yi fell silent for a moment and continued to ask: "What about Mrs. Cao, do you have any enemies?"

Mrs. Cao shook her head again: "No."

"I said, don't look in the direction of the enemy. It is impossible for our whole family to make enemies. Please believe me."

Chen Yi was noncommittal and said: "Mrs. Cao, the murder has just happened. Don't be so sure yet. Any situation is possible, so please Mrs. Cao try to recall, starting from the day you and Cao Yuning met, whether anything unusual happened." matter."

Mrs. Cao glanced at him and said, "No, everything is calm."

Chen Yi: "Are there times when you are not calm?"

Mrs. Cao: "No...oh, yes."

Chen Yi raised his eyebrows: "Huh? What's the matter?"

Mrs. Cao: "His father passed away eight years ago, which was a rough time for Yu Ning. He was in a very bad mood for several months. It wasn't until I got pregnant that he gradually returned to normal. "

Chen Yi: "Died of illness?"

Mrs. Cao nodded: "Yes, he died of severe high blood pressure and stomach problems in the hospital."

"Other than that, there's nothing."

Chen Yi: "Does he have a love rival?"

Mrs. Cao was surprised and said, "Of course not. I was single before I met him. Although there were people who liked me during this period, we stopped contacting him a long time ago."

Chen Yi: "In other words, Cao Yuning has no enemies and no competing competitors."

Mrs. Cao: "Yes."

Asked here, Chen Yi recalled the incident in his mind.

The crime occurred probably on the afternoon of last Friday. Cao Yuning did not go home after leaving school and was found dead in the suburbs the next day.

Mrs. Cao called the police that night, and combined with the cell phone on the victim, the police quickly locked the victim's identity.

It is worth mentioning that Cao Yuning did not drive when he left school, but walked out of the school gate, with an unknown destination.

Maybe, it was the murderer who called him out.

However, if the murderer in this case is the same person as the murderer more than ten years ago, Chen Yi personally feels that it is not very likely that Cao Yuning is the murderer and called out of the school, because it is easy to leave clues for the police to investigate.

Whether you contact someone via mobile phone, in person, or find someone to communicate on your behalf, you can follow the clues to find out the physical characteristics, and even get a clear portrait.

The murderer in this case is a cautious and smart person, and he should not mess around in a university where cameras are everywhere.

The safest way is to squat like a cheetah and wait for the prey to appear. There will always be a moment when Cao Yuning goes out alone without driving.

If this is the case, will there be anything to gain from checking the doctors and medical-related personnel who have been absent from work in the city in recent times?

However, there is no clear evidence yet to prove that the murderer is a doctor by profession. I can only say that the possibility is relatively high.

"Mrs. Cao, are you sure there was nothing unusual about Cao Yuning before he disappeared last week? Please recall carefully." Chen Yi spoke.

Hearing this, Mrs. Cao considered that it was not careless when it came to her husband's death, so she thought seriously for a long time, and finally shook her head: "I'm sorry, I really didn't find anything unusual, it's exactly the same as usual."

Chen Yi: "Did he see a doctor because he felt unwell?"

Mrs. Cao: "No."

Asked here, Chen Yi turned to look at Zhao Qiming, asking the other party if he had anything to ask, and the other party shook his head slightly.

There are no enemies, no competitors, and no financial gain. The methods of committing crimes are the same as they were more than ten years ago. It is increasingly possible that the murderer is the same person.

Afterwards, Chen Yi and Mrs. Cao continued chatting for a while until Zhuo Yun and Qin Fei came out.

Zhuo Yun came to Chen Yi and whispered, and then Chen Yi looked at Cao Yuning's wife: "Mrs. Cao, can we take Cao Yuning's computer away?"

Mrs. Cao did not refuse and nodded: "Okay, you can take it. You can take whatever you want, as long as the murderer of my husband can be caught."

Chen Yi stood up and said, "Thank you, Mrs. Cao."

"Excuse me today. If there are any major breakthroughs in the case, we will notify you immediately."

"By the way, please don't spread the news about Cao Yuning's death to others for now."

The five people took Cao Yuning's computer and left. When they came downstairs, Chen Yi looked at Zhuo Yun and the two.

Both of them shook their heads, saying that there was nothing suspicious found in Cao Yuning's bedroom and study.

Zhao Qiming said: "It's difficult to handle. Even if there is something suspicious in the study and bedroom, we probably won't know it before us. The murderer's motive is the biggest problem in this case."

He Xin said at this time: "When I go back in the evening, I will try to check the surveillance to see if I can find anything."

Chen Yi raised his hand: "No, let others check the surveillance. You have other tasks."

Shi Xin was stunned: "Other tasks?"

Chen Yi hummed and said: "The emergence of a new case is very important. It must be thoroughly investigated and everything about Cao Yuning is found out. I will leave this matter to Deputy He."

"Deputy He, who is on the Internet, should understand that I need to dig out all Cao Yuning's movements, even the posts, comments and other information that were posted in the early years but have been deleted."

"May I?"

Shi Xin glanced at the computer in Qin Fei's hand, nodded and said: "Yes, this is my strength. As long as there are traces left by Cao Yuning on the computer, whether it is local or network, whether deleted or not deleted, I will Find out and sort it out.”

"As for time...about two days."

Chen Yi: "Okay, then thank you for your hard work, Deputy Branch He."

"It's too late today. Let's go back first. We'll go to Cao Yuning's school tomorrow and find the principal of the school to get Cao Yuning's files."

"Also, I would like to meet Captain Kong Hanyong and Captain Kong. Is it convenient for Captain Zhao?"

Hearing this, Zhao Qiming hesitated: "This..."

"This case has dealt a huge blow to Master. He still doesn't know that the murderer may appear again. I'm afraid that he... won't be able to bear it."

Chen Yi: "I don't think Captain Kong is so fragile. If I want to say who has the greatest determination to solve this case, it should be Captain Kong."

"He has been investigating this case for so long. If we can have a chat with him, we will get twice the result with half the effort."

"What does Captain Zhao think?"

Zhao Qiming was silent for a while and finally agreed: "Okay, I will take you to see my master tomorrow morning."

…

The next day, Chen Yi and others came to Jiangcheng University and met the principal.

When Xin didn't come together, he was at the Jiangcheng City Bureau, trying his best to conquer Cao Yuning's computer and mobile phone.

The principal's surname is Chen, which is the same as Chen Yi.

"Captain Zhao? Long time no see, why are you here?" It seems that Principal Chen knows Zhao Qiming.

Zhao Qiming smiled and said, "Hello, Principal Chen, I have a case, please excuse me."

"Let me introduce, this is the leader of the provincial task force, Chen Yi."

"Huh?" Principal Chen turned to look at Chen Yi with a look of surprise on his face. He is so young.

After he came to his senses, he stretched out his hand to Chen Yi and said politely: "Hello, Team Leader Chen, we are destined to be together. Both of our surnames are Chen."

Chen Yi smiled politely and said: "Hello, Principal Chen, we are indeed destined."

After letting go, Principal Chen said: "Captain Zhao just said there was a case. I wonder what the case is? Does it involve our school?"

News of Cao Yuning's death has not yet come, and currently only his family knows.

The confidentiality of this case is relatively high, so if you can, try not to say it.

Zhao Qiming said: "Principal Chen, we came here this time to take away all the files of Professor Cao Yuning of your school. Thank you for your work."

"Cao Yuning?" Principal Chen frowned: "What's wrong with him?"

Zhao Qiming: "Sorry, Principal Chen, there are some things we are not comfortable disclosing."

Seeing this, Principal Chen didn't ask any more questions. He nodded and said, "Okay, I understand. I will immediately notify the archives office to send it to you. Please wait a moment."

Zhao Qiming: "Thank you very much."

After obtaining Cao Yuning's file, several people left the school and drove on the road, preparing to go to Kong Hanyong's home.

The distance is not far, it will only take twenty minutes, and Qin Fei is driving.

In the car, Chen Yi opened the file box and began to look through Cao Yuning's information, and handed part of it to Zhao Qiming and Zhuo Yun.

As time passed, Chen Yi's eyes froze and he picked up one of the papers.

"Change department?"

The files show that when Cao Yuning was studying for graduate school, he was about to graduate and take the Ph.D. examination, but he suddenly changed departments, from history to psychology.

"What change of department?"

Several people in the car looked over.

Chen Yi stared at the information in his hand for a while and said, "Cao Yuning once transferred departments, and he did so when he was in graduate school. This is quite rare."

It's okay to change departments for undergraduates, it's very common, but it's different for graduate students.

In principle, you are not allowed to change majors during your postgraduate period. You need to negotiate with your postgraduate supervisor and obtain their consent.

Zhao Qiming: "Why didn't Cao Yuning's wife say anything about this yesterday?"

Zhuo Yun said: "Maybe I don't think it's abnormal. How can the change of lineage in the early years have anything to do with this murder."

"Team Leader Chen, do you think there is a problem?"

When he came to Jiangcheng and there were outsiders around, Zhuo Yun no longer called Chen Yi by his full name, just as usual.

Chen Yi said: "I can't say there is a problem, but it is still a new discovery. It is unreasonable for graduate students to transfer departments."

"and……"

He lowered his gaze and looked at the time of system change: "Moreover, the time of Cao Yuning's system change was relatively close to the time when his father died. Did he suffer some kind of blow?"

"By the way, what does Cao Yuning's father do?"

Zhao Qiming replied: "Like Cao Yuning, he is also a university professor, so he can be regarded as inheriting his father's legacy."

Chen Yi: "What major should I study?"

Zhao Qiming: "History...huh? Is there any connection here?"

Chen Yi put down the document and looked at Zhao Qiming: "Cao Yuning's father studied history. In his early years, Cao Yuning himself also studied history. But when Cao Yuning's father passed away, Cao Yuning suddenly switched to psychology."

"We won't talk about coincidence. There is a high possibility that there is a connection, but it may not necessarily be related to his death."

Zhao Qiming thought for a while and said: "The father who studied history fell ill and passed away. As a result, Cao Yuning lost interest in the history major, and he could not get over the haze of the death of his relatives, so he switched to psychology, not only to study but also to cultivate himself."

"Is this explanation reasonable?"

Chen Yi nodded: "It's very reasonable. The possibility is still relatively high. Let's put this matter aside for now."

New clues are sometimes useless unless information that emerges during future investigations matches the otherwise useless clue.

Now is the early stage of the investigation. What we need to do is to cast a wide net, look for more clues, write them down first whether they are useful or not, and then see if they can be connected.

If it can be connected, it means that the case is starting to move forward.

Several people stopped talking and continued to read the information.

There is nothing else. Cao Yuning successfully graduated from graduate school step by step, then stayed in school, and then got a doctorate while in school. His life was still very exciting and successful.

It's a pity that he was buried in the soil for no reason, his head was smashed, and he still watched himself die.

Twenty minutes later, Chen Yi and others arrived at Kong Hanyong's home.

Kong Hanyong’s wife went out to buy groceries, and he was the only one at home at the moment.

When he opened the door, the other party was holding a shower head filled with water. He should be going to the balcony to water the flowers.

"Qiming? Why are you here?"

Kong Hanyong was a little surprised when he saw Zhao Qiming.

Nearly sixty years old is not too old, but Kong Hanyong's hair has turned white and his body is a little rickety, but I don't know if it is because of the case more than ten years ago.

Mood is very important. If you are depressed all the time, it will be reflected in your complexion in the long run.

Kong Hanyong's complexion was not good.

"Master..."

Zhao Qiming hadn't seen Kong Hanyong for a while. Seeing the white hair on his head, he felt inexplicably sad.