Since the murderer is that person, and I know the modus operandi, then everything is easy to do, as long as the evidence is found. But he has been planning for so long, will it show flaws? I thought so.

Wait, what is this murderer doing so painstakingly to complete these processes, not just to cover up his own methods, then there is only one remaining possibility.

It seems that this is really a sad story.

So, in order to collect evidence, I came to Hong Xin's dormitory, asked about the relevant details before and after Hong Xin's suicide, and finally restored what happened. It seems that it is necessary to talk to the person concerned, it will be a sad ending, but I can contribute some of my own strength to this ending.

In the end, I still stood in front of Feng Yun.

Feng Yun looked at me in surprise and asked, "Is there something wrong with Mr. Police?" ”

"I want to know something about you and hope you can cooperate." I replied.

"Okay." Feng Yun was unusually calm.

But I couldn't calm my heart, I didn't know how to speak, and I couldn't be ruthless in the face of a student, even though she was a murderer. Eventually, I calmed my mind and said slowly, "I'll tell you a story." Feng Yun just nodded. I went on to say, "I have a friend, this friend's name is Xiaoping, and she has a best friend named Xiaofang," and I was very confused at the time, so I thought of these two pronouns: "However, what makes people like the same person is that these two people actually like the same person, this person is still their teacher, but this teacher is very indecent, on the surface he is a righteous gentleman, but behind his back he is a wolf in sheep's clothing, he clearly rejected the love of two female students, but behind his back he hooked up with both students, Even Xiaoping was pregnant with his child, just when Xiaoping was dreaming, she found that her best friend was actually in love with the same person she liked, between love and friendship, she chose friendship, so she resolutely left his beloved teacher. Later, no matter how much the teacher pursued her, or even intimidated her, she ignored her. Eventually, she threatens the teacher with her child, but the teacher is fierce and eventually kills her and disguises herself as hanging. But at this time, Xiaofang was still immersed in sweet love, and when Xiaofang sweetly helped the teacher tidy up the desk, she found a pile of receipts for buying flowers, which had her own and Xiaoping's names, so far she finally understood why Xiaoping was in a trance, and also understood why Xiaoping died, she knew that even if Xiaoping was not killed by this teacher, her death must be related to this teacher, and finally she got confirmation from Xiaoping's diary. From that moment on, she knew that the person she loved turned out to be a murderer, how much she regretted it at that time, and even wanted to call the police, but she knew that she had no evidence in her hand, even if the police sympathized with her, it would not help, and she might even cause murder for herself, if she didn't report it, this teacher didn't know how many students would be harmed. So, a terrible thought came to mind, and that was to get rid of this beast. However, it is not worth risking her life for this beast, so Xiaofang thought of a way to create a secret room and a way to kill people invisibly, for this day, she and her friend Xiaoping have paid too much. ”

"So, what did this friend of yours come up with?" Feng Yun asked coldly.