"I'm back."

At this time, Cao Fang's father was sitting on the sofa drinking tea and watching TV, and when he saw his wife coming back, he pretended to be calm.

When Cao Fang's mother saw a pile of gifts on the table, she asked, "Where did these things come from, did someone come to the house?" ”

"Well, my daughter's school just sent someone to visit us, and these are all gifts they brought."

"It's really heartfelt." Cao Fang's mother replied expressionlessly, saw her walk to Cao Fang's room, opened the door, looked around, and saw that there was no trace of passivity, before leaving with confidence, closing the door and walking into the kitchen.

There was a pond outside Cao Fang's window, and Shen Panzhe and Chen Lin didn't have time to go out of the gate, so they had to jump out of the window, but fortunately, there was a stone slope below the window, and they walked slowly to the left with their backs against the wall.

Afterwards, they called a ride, and twenty minutes later, back at school, Chen Lin asked Shen Panzhe, "Xiaozhe, have you found any clues?" ”

"If I'm not mistaken, Cao Fang was in love before her death, and the object was still from the same school."

Shen Panzhe responded, his tone firm.

"Girls generally like whimsy, novels are all imagination and fiction, she wrote the male protagonist in her heart into the book, this is normal, Xiaozhe, you can't use this as evidence that people have been in love."

"Brother Lin, since what I will say, there must be some basis, you listen to me first."

"Okay, you say."

Chen Lin's expression was serious and full of curiosity at the same time.

"First of all, although fiction is a combination of imagination and fiction, the source of their creation must be based on the bits and pieces of life, according to their own imagination of what they see, hear, and feel, and finally form a story and write it into the novel."

"Cao Fang has a withdrawn personality and has no friends, and it is difficult to write such a real and vivid article if she relies on imagination alone, but her novels are full of joys, sorrows, joys and sorrows, indicating that she is immersed in the scene, or empathizes."

"The story she writes is mainly the process of the male protagonist and the female protagonist from meeting, acquaintance, acquaintance to love, and the background of the occurrence is in school."

"And in her novels, there are a lot of times and a lot of places about the school, which make people feel very real, so we will have to verify these places later to see if they are consistent."

"Secondly, there is a portrait of the boy in her bedside table, and the male character in the painting is very similar to the characteristics of the male protagonist she described: slightly curly hair, melon seed face, thick eyebrows, cold eyes, closed mouth, not very smiling, and moderate body shape."

"So, eight or nine are not far from ten, Cao Fang has been in love, and her object is the same school, or the same class."

"Makes sense." Chen Lin nodded in agreement, and added, "According to this reasoning, then why she participated in the summer vacation trip makes sense, it is very likely that her boyfriend invited her, and he is also there." ”

"That's right." Shen Panzhe smiled knowingly.

"I didn't expect you to know novels, you don't usually read less, right?" The corners of Chen Lin's mouth raised slightly, and he teased.

"Haha, it's okay, Keigo Higashino has read a lot of novels." Shen Panzhe replied with a smile.

"If that's the case, let's assume that he is the perpetrator, then what is his motive for prank, revenge?" Chen Lin asked.

"Should... Isn't it?" Shen Panzhe wasn't sure.

"But Cao Fang died accidentally, why did her boyfriend take revenge on that group of girls, is it just because they didn't find Cao Fang drowning in time, which caused her to die of ineffective rescue, so he holds a grudge?"

"Should... Isn't it..."Shen Panzhe replied embarrassedly, he couldn't think of anything else except for this reason.

There are countless impulsive, emotional, and petty fights in society, and as the saying goes, people are unpredictable, and anything is possible.

In other words, there are angels and demons living in everyone's body, and the reason why people sin is nothing more than improper control of their own emotions and desires, and the demons in their hearts take advantage of them and let them act recklessly.

"But these are just our reasoning, there is no actual evidence, even if he is found, it can't be proved that he is playing a prank, it seems that only Sister Wen and Xiao Liu can find relevant evidence."

"Our mission is complete, the rest is up to the two of them, I hope they have something to gain, there are only two days left."

When night falls, Stone Forest University is bustling, with students gathering on the football field to sing, dance, and play games, some to play and watch in the fields of soldier ball, badminton, basketball, etc., and more to sit in hamburger joints, bubble tea shops, fruit shops, and bakeries.

There are also those who run on the track, probably in order to complete the targets set by the school, and they have to run two kilometers every day, which is really miserable.

Building B, the dormitory management office, all four of them have arrived.

Shen Panzhe and Chen Lin reported to Guo Wen, and after Guo Wen heard it, she was silent for a moment, but she didn't expect Cao Fang's secret to be hidden so deeply, and no one found out.

"Sister Wen, what information did you get from that group of girls?" Shen Panzhe asked, and Chen Lin was also curious.

"I asked them, and they didn't have any conflicts with their classmates in other majors, but got along well."

"I searched both sides of the door, but I didn't find anything high-tech, only sockets and fan light switches, and I also took it apart and looked at it, and there were only wires inside."

"But I found that in each dormitory, routers are installed in the corners of both sides of the door, could it be that it is doing tricks, and its light point is parallel to the wall, maybe the light point has been set to have a sensing function, so it will be sensed whenever the door is opened."

"The most important thing is that all the routers in the dormitories in Building B were replaced with brand new ones at the beginning of this month, and this happened at this time, so I guess there may be a connection."

"That's not right..."Chen Lin thought for a while and asked, "The router is installed in the corners on both sides of the door, if it makes a sound, why didn't they find it?" ”

"It's not hard to explain."

Shen Panzhe replied, "In fact, sound can deceive our ears and brains. Woof! Woof! The first thing we think of is a dog's bark, we look at where there is a dog, and we lock the search object on the dog, but is this 100% correct? ”

"The common sounds in our lives have been etched in our heads, and whenever we hear them, we naturally know what they are, or what we lock onto."

"So, when there is a knock on the door, we lock on to the door as soon as possible, and the source of the sound is close to the door, and it is half past two in the morning, so it is difficult for the human brain to judge out of exhaustion."

"Listening to your words is better than reading a book for ten years!"

Chen Lin sighed, and everyone agreed.

In fact, this is just a theory that Shen Panzhe accidentally saw on Baidu, and by the way, I remembered it in my mind, but I didn't expect it to come in handy today.

"Xiao Liu, has the surveillance video of the B&B they stayed in called up?" Guo Wen asked Xiao Liu.

"It's out, Sister Wen, and I've sorted it out, and I'll send it to the group now." Xiao Liu responded.

"Uh-huh."

They opened WeChat and clicked on the Detective Four Crowd.

Looking at the video video, as expected, there was a figure walking back and forth in their doorway, and seeing that he had stuck a very small object in the crack of the door, and it was difficult to find, it seemed that this person was the perpetrator.

However, he is wearing black, wearing a mask and a black hat, I am afraid that he can't even recognize his own mother, only his height can be seen, about 1.8 meters.

Although the video is shortened to a few minutes, it fully shows the process of the perpetrator from start to finish.

"Xiao Liu, are there no other videos?" Guo Wen asked, and the video ended up showing the perpetrator fleeing through the back door.

"Sister Wen, the back door is connected to the streets and alleys, most of them are not equipped with cameras, there are many blind spots, plus people come and go, it is difficult to find out without half a month." Xiao Liu hurriedly explained.

"Okay, everyone's worked hard, now I'll distribute the tasks."