When Su Yunxi heard him say this, his eyes moved, raised his head, and just met Song Huailing's gaze.

The two of them recalled the almost fierce love language on the threatening letter, and they both frowned.

"If I have to say it, it may be the matter between me and Xia Ning, which makes that person suddenly ......"

When the policeman heard him say this, he raised his eyebrows suspiciously, and Song Huailing explained: "I am pursuing Xia Ning now, and most of the people in the school know about it." ”

The two policemen knew that Song Huailing was a popular figure in the school, and nodded clearly when they heard this.

"If that's the way it is explained, it does make sense."

"Then this classmate, have you ever had such an overly enthusiastic suitor around you before?"

Song Huailing shook his head: "Except for the person who sent me the threatening letter, I have never met other such paranoid people." ”

Although he used to be gentle and humble, he kept a proper distance from the girls in the school.

When the officer heard him say this, he responded: "The three threatening letters have been sent to our laboratory for identification. ”

"It's just that whether the threatening letter is related to the case of the shed falling, we have not yet confirmed."

"We just found that the iron lock tied to the top of the pillar seems to have been corroded by some chemical agent, so I want to ask, do you know this student Song, who is majoring in chemical engineering."

"Or have any of your chemical engineering majors pursued you before?"

Corroded by chemicals? That said, there is nothing wrong with the news circulating in the campus forum.

Song Huailing shook his head when he heard this: "Although I know classmates in related majors, I haven't had a deep relationship. ”

"And the few I know are all male classmates, and no one has ever pursued me."

Speaking of this, the expression on his face was stunned: "Those who can get corrosive reagents are not necessarily chemical engineering students." ”

In the chemistry laboratory of their school, there are often graduate students doing experiments, and there are many people coming and going on weekdays.

Although the school has tightened its control of surveillance, it does not count if some people try to steal reagents from the chemistry lab

Difficult.

Thinking of this, he immediately asked, "By the way, the two police officers have investigated the surveillance around the chemical laboratory?" ”

"I've investigated, and I haven't seen anything suspicious." One of them sighed.

"But you don't have to worry, my colleague is still checking who appeared backstage at the time of the accident on the day of your school's party."

"It won't be long before we get useful evidence."

Song Huailing nodded in response when he heard him say this, but Su Yunxi couldn't help frowning, vaguely aware that there seemed to be something wrong in this matter.

However, before she could figure out what the "wrong" was, the policeman had already asked another question.

"Did you have a feud with anyone at school?"

When Song Huailing heard the other party ask like this, the expression on his face was stunned, and he was silent for a long time before he spoke: "Revenge? I didn't have a grudge against anyone, but ......"

Seeing his hesitation, the policeman immediately continued to ask, "But what?" ”

"But there are occasional conflicts with people." After Song Huailing said this, a helpless smile appeared on his face unconsciously.

"Presumably, the two police officers also know my position in the school, and it is inevitable that there will be things that I have not handled well in my work, but I don't want to speculate too much about those who have clashed with me."

When the officer heard him say this, he couldn't help but laugh: "I understand your good intentions, but in the current accident like this, I still hope that you can tell us everything you know." ”

Song Huailing heard him say this, nodded silently, and said the names of the people who had clashed with him in turn, and finally said.

"And Li Long, every time the two of us clash because of some trivial matter, he should hate me."

After listening to his words, the police officer did not ask why, carefully wrote down the names of the people he said, and was about to open his mouth to continue questioning, when the mobile phone of one of the officers suddenly rang.

The two officers glanced at each other, and the other picked up his phone and picked it up.

"What? Is there any evidence? What about surveillance? ”

The person on the other end of the phone too

I don't know what to say, but the expression on the face of the police officer who answered the phone gradually became solemn: "I know." ”

He finally answered again, hung up the phone casually, and the police officer standing next to him immediately frowned when he saw this: "What's wrong?" ”

The officer's face was a little ugly, and he was silent for a moment before he spoke: "The comrades who investigated at the scene found other clues, which proved that the beam had indeed been tampered with. ”

"But the people who did it didn't seem to know much about how to use the reagent, and there were other mistakes in the design of the mechanism, and we found excess reagent on the beam next to the column."

When the officer heard him say this, he was stunned, and then immediately reacted.

Since the person who did it this time wanted to disguise the incident as an accident, it was absolutely impossible to leave other superfluous traces at the scene.

The reason why they also discovered other things at the scene must have been unaware for a while and accidentally left at the scene.

However, if something goes wrong with that mechanism, then ......

Everyone present seemed to have thought of something, the expression on their faces moved slightly, and another police officer even spoke: "What did the analyst say?" ”

"Analysts said that judging from the amount of corrosive reagents remaining at the site, most of the people in the design agency wanted the roof to fall about five minutes early."

"About 5 minutes early?" Everyone who heard this answer was heartbroken, and Song Huailing immediately looked back at the girl lying on the bed.

Su Yunxi's face sank even more, and he immediately thought of something.

According to the evidence just provided by the police, the roof of the shed fell five minutes before she was standing in the center of the stage.

In other words, it was very likely that the mechanism was aimed at her in the first place.

And not only did she think about this clearly, but Xia Ning's father also thought of this immediately, and the expression on his face suddenly changed.

However, just as he stepped forward to inquire about the details of the accident with the officer, he heard one of them continue to speak.

"In addition, colleagues in the school investigation found that on the platform extending from the second floor of the teaching building behind the stage, glass bottles that may have been used to hold corrosive reagents were found."