The first case and the second button have a point of contact, and the rest of the search makes it much less difficult.

At least the police don't have to search aimlessly in landline homes.

Qin Yongfeng saw the red eyes of the husband and wife, he seemed to know something just after the death of his loved one, and became extremely silent.

"Can you do me a favor?"

Jiang Qingrui stood up with a gentle voice, she had a strong affinity at this time, Qin Yongfeng's nose was sour, and he nodded heavily.

After all, he is also a child who has just gone through the exam, and in front of his father, he can't bear to reveal his sadness, afraid that his father's emotions will be infected and he will not be able to support the family.

"Please call your classmates one by one to ask if there is a landline at home and if you have received strange calls."

The number of classmates was large and the time was long, so the police took Qin Yongfeng back to the police station first and waited for a long time.

At first, the progress was very fast, first of all, I asked if there was a landline in the house, so that I could eliminate more than half of the people.

Qin Yongfeng didn't know why he did this, but he believed that the police must have made sense, so he drank a few sips of water next to him halfway, and kept making calls for a moment.

He hoped that he could help this case, at least to reassure his dead mother.

"I got a phone call."

A girl replied like this, and at the same time felt inexplicable, and couldn't help but complain to Qin Yongfeng, "It was very strange at the time, there was a person who said that he was a university teacher, and he saw that my qualifications and grades were good, and wanted to talk to me alone." ”

"My parents were sitting next to me at the time, and when I heard that she was a teacher, I pressed the speakerphone directly, and my parents just said a word, which was to ask the teacher when they would meet, but the person snapped and hung up the phone."

The girl felt very angry when she thought about it now, and she was a little interested, but when she called back, no one answered.

The girl was the only one in the class who received the call and survived.

When Xu Shu held a meeting, everyone spoke enthusiastically

Qiao Linlin was the first to take the lead, "The person who called must be the murderer." ”

"And the killer chooses not only to have a landline at home, but also to make sure that there is no one else around the person who answers the phone."

Jiang Qingrui felt that her speculation was very good, and finally figured out why the murderer used a landline and was not an acquaintance to commit the crime, but he could still enter and leave the house.

In the first case, Chen Jingyi heard that her son was appreciated by a famous teacher, and agreed to meet without thinking about it, hoping to let her child have a good future.

When Mei Yuting in the second case answered the phone, her mother next to her did not make a sound, so the murderer took it for granted that he was a person.

When the girl heard that the teacher wanted to recruit students, she quietly buried the good news to her parents, and wanted to wait until the evening to surprise her parents.

But it was this action that made her a ghost under the murderer's knife.

Everyone present felt very pity, and when Mei Yuting's parents heard this reason, they were even more heartbroken, they blamed their daughter for themselves, and they couldn't wait to leave instead of their daughter.

"Is the murderer really a teacher?" Xu Ying then asked, "What if it's fake?" ”

There is no clear answer to this question, and the identity of the killer remains a mystery.

"Start with the teachers at school."

Xu Shu was not too entangled in this, and began to send out tasks to find suspicious teachers.

The teachers became the first suspects, because they had detailed information about the students, and their names, phone numbers, and home addresses were all publicly available, and landlines and personal mobile phone numbers were also clearly visible.

"I know that the police are desperate to find the murderer, but I am really wronged."

As soon as the head teacher who pressed the two buttons woke up, he was told to go to the principal's office for a conversation.

But the principal was not there, and as soon as the teacher sat down, the two police officers opposite him showed their ID cards and told him directly that two people had died, one of whom was still a student in his class.

Hearing such heart-stimulating news early in the morning, Sun Liang suddenly couldn't breathe, and his first reaction was that he was suspicious, and the two policemen in front of him didn't look very good.

His hunch was not wrong, Sun Liang didn't wait for the two of them to ask anything, and he hurriedly defended himself.

"You listen to us first."

Jiang Qingrui interrupted Sun Liang, her attitude softened slightly, she had just experienced an all-nighter, and her expression was indeed not very friendly.

Especially Xu Shu, who was serious, didn't dare to let people approach.

She said the time of death of the two deceased, "What are you doing at this time." ”

Let Sun Liang suddenly think about it, his brain went blank for a while, and licked his dry lips, "Let me think about it." ”

"The first time I was in class, and the second time I was in a meeting with the teachers at the school."

Jiang Qingrui nodded, and was going to verify it for a while, so she asked about the status of the two children at school, and went to the monitoring room after confirming that it was correct.

Sun Liang said that there was no problem, there was a perfect alibi for both times, and the second meeting basically included all the teachers in the school, which could exclude many people.

Returning to the police station empty-handed, kk inquired curiously, learned that no suspect was found, and subconsciously began to analyze.

"Could there be hackers who got into the school's backend and retrieved the students' information?"

This idea is not impossible, KK did not wait for others to react, immediately sat down in front of the computer, and began to analyze and check the school's backstage.

The starting point was good, but the result disappointed KK.

There is no trace of hacking in the database, and Kk is confident in her skills, and so far there has been no trace of her elimination that can be concealed.

According to this, there is no suspicion on the side of the school.

But if it weren't for a copy of the database, how did the killers find their phone numbers and addresses?

The scope of this speculation is too broad and too large, and several people have been gossiping for a long time, but they still can't think of a clear direction.

Since Qin Yongfeng helped the police make calls, he was worried that his classmates and parents would know the progress of solving the case, so he often came to the police station.

When he came today, he knew that several policemen he knew were in a meeting, and he obediently sat on the bench at the door, the room and the door were not soundproofed, and a few sporadic words entered his ears intermittently.

Qin Yongfeng didn't mean to eavesdrop, based on what they said, it could be roughly inferred that he was arguing about something now.

The boy stood up at this time and knocked on the door of the meeting, "Sorry to interrupt, I didn't mean to listen to you, I just want to say that I have a classmate directory in my hand, which has the phone numbers and addresses of almost all my classmates." ”

The voices in the room were instantly quiet, and several pairs of eyes looked at Qin Yongfeng one after another.