"Bad ......"

Last Minute ...... The last thirty seconds...... The last ten seconds......

It was still late, and by the time we arrived, we had just caught up with the falling object...... It was a tall boy who fell headfirst straight up from the eighth floor.

Died on the spot.

I just felt a darkness in front of me. Why isn't it a little faster? It's almost enough to save a young life, and the murderer is the one who killed in front of many of our policemen!

The deceased is still one of the graduate school entrance examination parties, Lai Lianji, the leader of the 12th grade civil engineering class 5, he is very handsome, and there are quite a lot of suitors, but he talks little and hardly communicates with people.

The three cases can almost be concluded to be committed by the same person, and the key to the problem is still the math problem released by Mr. Qin.

However, when Lai Lianji died, Mr. Qin was controlled by our police.

"It's clear that he has complicity."

Perhaps.

The suspect still shouted that he was wronged, claiming that he was innocent and knew nothing, but the group news released in the QQ group was ironclad, and many students also saw that the scene and time of the crime caused by the three unreasonable so-called Pythagorean theorem questions were exactly the same as what happened in reality.

"What's the problem?"

I didn't think deeply, and said slowly: "The time of death of the three deceased people is three, four, and five o'clock respectively, which just satisfies the Pythagorean theorem, hook three, strand four, string five, this is too strange." ”

Senior Brother Qiu Yu smiled: "Gillian, you have learned math well!" ”

This kid came to sour me again, who doesn't know that this is something that I learned in elementary school, but then again, what is the purpose of such a simple and illogical Pythagorean theorem?

"Teacher Qin, you keep saying that the whole thing has nothing to do with you, why do we find that the IP address is exactly the same as the location of your home?"

"Didn't there be something similar on the Tianya Forum a few years ago? A person committed suicide live on the post, but the police found an uncle who was fighting the landlord through the IP address, and the IP address was randomly assigned, not absolute. He still speaks.

I looked at Senior Brother Qiu Yu: "What should I do?" ”

"Looking for evidence, there must be other clues, and when the time comes, the evidence will be conclusive, and he will not be allowed to deny it."

Senior Brother Qiu Yu was right, so our police shifted the target to the investigation of the three deceased.

"Lin Fangjie, Cheng Xiaohan, and Lai Lianji are all preparing for the graduate school entrance examination, and what is even more coincidental is that high school is still in the same class." Senior Brother Qiu Yu raised a smile at the corner of his mouth, and he had to admit that in the bureau where the case was serious, although he was not tall and handsome, it was indeed rare for a policeman like him to charm many young girls with a rippling heart, and if he could change his cynical temper and his attitude of always loving others, there must be more suitors. Maybe even I'll fall into it!

But now is not the moment for me Huang Ajiao to admire him, I continue to listen to him finish speaking.

"Not only that, I have investigated, Mr. Qin was also their mathematics teacher of the year, and later he was evaluated for his title, promoted to doctorate, and transferred from high school to this university."

Do you believe, dear reader, that there is such a coincidence in this world? However, there are many coincidental things piled together, but it is not as simple as a coincidence. But then again, if Teacher Qin is the murderer, there must be a murderous purpose, but after this incident, it is obvious that there is no benefit to him, because of this incident, Teacher Qin has been expelled from the party and dismissed from the school.

"What was the motive for the killing?"

"Maybe these three students have mastered some of Teacher Qin's handles, and Teacher Qin has no choice but to kill them."

Since the number one suspect has been locked, we will immediately launch an investigation, because if the suspect is the murderer, he must have been an accomplice, Lai Lianji died with his head up, if he committed suicide, he should not have fallen in this posture, judging from the scene, he should have had an argument with someone and then was pushed down.

"Who else is in Mr. Qin's family?"

"My wife passed away the year before last, and there is only one daughter in the family now, who is also studying at this university, a junior, in the foreign language department, and she is very beautiful."

"Is there such a possibility, it was the person she helped Teacher Qin kill."

Senior Brother Qiu Yu smiled slightly: "No." ”

"Why?"

"The foreign language department knows that she is pursuing Lai Lianji."

7. Anonymous Mail

Late at night.

The mobile phone placed at the bedside vibrated a little, and as a police officer, I couldn't help but wake up, and when I picked up the phone, it turned out to be an email.

The headline of the email read: He is guilty, but he is not the murderer.

Clicking on the email, the internet speed is a bit slow, but the content is finally out.

"Officer Huang, I'm sorry to interrupt me late at night, but I just don't tell the truth, I can't get over it on my conscience, and I'm on the verge of collapse. Mr. Qin, he is just a sinner, but he is not a murderer, I promised that one person would not tell the truth of the matter, but both of them are my favorite people. If you want to know who the murderer is, please go to Class 7 of the second foreign Chinese middle school, ask a Chinese teacher surnamed Chen in this class, the three deceased were all taught by this teacher, and don't check the IP address of this email, because it is meaningless. ”

All the drowsiness suddenly dissipated, and I vaguely felt that the truth was approaching, step by step.

I got up early in the morning and drove to the No. 2 Foreign Chinese Middle School mentioned in the letter, which was distributed in an independent teaching building for the third year of high school, and the seventh class of the third year of high school was on the eighth floor.

There is no elevator, and it is already past the time of the college entrance examination for those who walk up, but there are still many students in the second and third years of high school who come here to participate in self-study. At the podium table, a dignified woman in her 40s is looking down and intently correcting the students' homework with a red pen.

I stepped forward to interrupt and explained my intentions, and Mr. Chen helped his glasses: "Yes, Lin Fangjie, Cheng Xiaohan, and Lai Lianji all graduated from level 12, and they are classmates in my class, as well as Xu Qinglang." ”

"Who is Xu Qinglang?"

Mr. Chen was deeply involved in the meeting, and through my glasses, I saw a pair of deep-set eyes full of sadness.

"She killed herself."

I was struck by this answer.

On July 17, 2015, all colleges of Xiamen University of Technology completed the final examination and officially entered the third semester.

At the same time, there is still no sufficient evidence to prove that Mr. Qin was directly related to the three homicides, and that he has regained his personal freedom beyond the period of criminal detention.

Senior Brother Qiu Yu is scrolling through Weibo.

"Gillian, look at this long Weibo with the title of 'A senior high school girl was insulted by her teacher because she couldn't solve math problems, and she committed suicide in shame" The number of retweets has reached tens of thousands, it's too coincidental, this teacher was doxxed by his name, and it is Qin Baoqiang, the number one suspect in our three murder cases. Gillian, why do you keep looking at me, not shocked at all. ”

I said lightly: "This is the news more than three years ago, the girl's full name is Xu Qinglang." ”

"How do you know?" He was surprised.

I learned the truth from the Chinese teacher surnamed Chen. Lin Fangjie, Cheng Xiaohan, Lai Lianji, Xu Qinglang often discussed problems together throughout middle school, Xu Qinglang had a cheerful personality, lively and cute, and the three introverted and thoughtful boys unconsciously liked this girl at the same time. It's just that in a certain math class, Qin Baoqiang, who was the mathematics teacher of the seventh class of the third year of high school, called Xu Qinglang to solve a math problem related to the Pythagorean theorem in a math class. Xu Qinglang's self-esteem was greatly frustrated, and he jumped from the eighth floor crying after class.

Leaving Xu Qinglang's life, the study careers of the three boys resumed as uneventful as ever, they went to the same university in the city, entered different colleges, and Qin Baoqiang was also transferred to this university as a teacher. The three boys decided to take revenge on Qin Baoqiang in order to pay the price of their respective lives.

They all committed suicide, which explains why there is no trace of the murderer at the scene of the crime, and any homicide will leave clues, even if it is the most shrewd murderer.

"Then how do you explain the math problems posted by Teacher Qin in the graduate school entrance examination group."

This is the key to the whole thing, and it is also the best means for the three of them to take revenge, in front of many students, by publishing the math problem of death prediction, creating the illusion that the murderer is Teacher Qin, so that he will be abandoned by the world forever. There was another person who posted the math problem, which was conspired by the three of them, so that Qin Baoqiang became a locked suspect step by step. ”

Senior Brother Qiu Yu found a chair next to him and sat down, looking at me with interest: "Then how do you explain the fact that the IP address happens to be Qin Baoqiang's family?" ”

"Because there is the most important person, the person who sent me the anonymous email, I'm sorry, but I still checked the IP address of that email......" I said, looking up at a pale but still beautiful girl who slowly walked in.

"I framed my dad."

Since Lai Lianji's death, she has never put on makeup again, hanging her head all day long, and her hair is unkempt. Maybe it's really only love that can make people do such crazy things.

"Lai Lianji told me their whole plan, and asked me to help use my home computer to post strange math problems in the QQ group for graduate school entrance examinations, so that the police can find my home through the IP address, and only I can do this."

"But he's your father, why ......" Senior Brother Qiu Yu stood up, his face expressionless.

Qin Guiling's emotions were obviously a little excited, her beautiful big eyes were full of fear, and her tone was eager: "Lai Lianji, because I love him, just like they like Xu Qinglang." After a pause, there was silence for a moment, "To be honest, I envy Xu Qinglang so much that he can be loved by someone like Lai Lianji." ”

On July 23, 2015, the No. 7 teaching building of Xiamen University of Technology was officially completed.

At five o'clock in the afternoon, a brightly dressed girl jumped from the eighth floor......

"What did you say to Qin Guiling to make her end her young life with death."

Senior Brother Qiu Yu was indifferent for a minute or so before he slowly spoke: "Gillian, how do you know?" ”

"Before I left that day, I saw that you stayed, and Qin Guiling was also there." I looked into his eyes, which were near-perfect but hidden too many unclear waves, like a falcon that, once aimed at its prey, it had nowhere to run. "I also know that you are Xu Qinglang's own brother."