With both portraits in my pockets and my hands in my pockets, I still chose to walk home on this cold day. Because of the cold wind, it can make my brain clearer.

As I walked, I listened to the sound of traffic, looked at the dazzling neon, and pondered.

He Xiuxin is a student at Bayu United University of Science and Technology, and the date of the video shooting is when He Xiuxin was in school. And her performance in the video is very strange, and the strange things she says don't look like normal people should say. But if you look at that video from another angle, it's different. Can I regard this video as a self-made film and television short film by He Xiuxin and He Yunjing, if it is a film and television short, then the strange words He Xiuxin said can be explained. It's not that she has any demons, nor does she believe in any cult, it's just the lines of the film and television clips. These post-95 young people like to use some unconventional, weird and terrifying words and sentences to explain their attitude towards life. If you look at the video from this angle, you won't feel absurd, and you will definitely not think that it was a suicide last word.

Thinking in this direction, then He Xiuxin's so-called suicide note is even more certain that it is just a poem she wrote related to the video.

I am convinced of the accuracy of my inference. Hurriedly sent a WeChat message to Lao Lu: Check He Xiuxin's school tomorrow to see if there are any club activities in their school on May 21 last year?

After two minutes, Lao Lu replied to me with a message: What are you doing to check this?

I replied: I suspect that after May 21 last year, He Xiuxin's Bayu United University of Science and Technology may hold campus activities, and He Xiuxin's video is a small movie made to participate in campus activities. If this can be confirmed, then it will be possible to find out the reason why the suicide note and the last words video were filmed.

Lao Lu replied: Since it has been determined that the video and suicide note are fake, why do you have to dig into the horns to find out where they come from?

I replied: Don't you think that video and that poem look so much like it was written and filmed by a person who has no nostalgia for life? I suspect that this poem and this video were all directed by He Yunjing, and their purpose was to pave the way for the murder of He Xiuxin. Then think about it with divergent thinking, maybe the so-called campus activities were also to pave the way for the murder of He Xiuxin.

Lao Lu said: Your idea seems a bit mysterious, do you think that the entire Bayu United University of Science and Technology planned and murdered He Xiuxin?

I replied: Why not? The object of my suspicion can be a person or a team, and it is likely that there is such a criminal team within the school, maybe it is related to Qu Mo.

Lao Lu replied: Your thinking seems to be a bit one-sided and paranoid. Qu Mo does make you nervous, even a little nervous, but you can't doubt a serious university. Okay, I won't say more to you, tomorrow I will investigate whether there are campus activities at Bayu United University of Science and Technology around May 21 last year. Tomorrow if you don't sleep in, you can come to the criminal investigation team early, and we will go to school together.

I replied with a tearful emoji: "The school is on winter vacation, what are you going to school for?"

Lao Lu replied with a nose-picking expression: Could it be that the school has become a ghost school during the winter vacation, and there is no half of a figure to be found?

I couldn't argue with that, and replied with an embarrassed look: You won.

Lao Lu didn't reply to my message, and I walked home unconsciously.

It seems that my life is not much fun except for solving crimes, but I don't feel lonely or lonely, because pulling a random case out of my brain is enough for me to reminisce for most of the day.

There is no morning light, only morning rain.

The rain was not heavy, and it was just a little moisturizing of the earth.

This kind of rain is not rain at all for an old man like me, so I don't bother to take an umbrella. In fact, this laziness is a kind of responsibility for the umbrella, because in this kind of weather when the rain will stop at any time, it is easy to forget the umbrella taken out in some unknown corner. Especially for someone like me who focuses on the case, who remembers that insignificant umbrella? Simply don't bring it.

I went out at seven o'clock, got on the bus, and arrived at the criminal investigation team at seven forty o'clock.

What I didn't expect was that as soon as I arrived at the criminal investigation team, Lao Lu gave me a surprise. The cremated corpse in He Yunjing's house has been identified. The method of identification is obtained by comparing the DNA extracted from the pulp with the DNA in the national database.

But the fly in the ointment is that the cause of death of the cremated body has not been investigated for the time being.

The male cremator in He Yunjing's family, Song Huchao, is a 47-year-old divorced man who once served a prison sentence for molesting a woman and is now a cleaner at the Tengyun Chemical Factory.

Lao Lu has already sent people to investigate some information about Song Huchao before his death, especially to investigate the people who were close to him during his lifetime. Because of a middle-aged cleaner in a factory, why would he appear in the home of a young woman in the factory? This makes people somewhat reverie.

Lao Lu pointed to the materials provided by the forensic appraisal center and said, "This old rascal won't have a leg with He Yunjing, right?" ”

I frowned and pondered for a while, then shook my head and said, "I don't quite agree with this statement. ”

Lao Lu looked at me and said, "Then what do you think?" ”

I lit a cigarette and said, "I don't think that Song Huchao will have a relationship with He Yunjing, I think Song Huchao is a human body used for experiments, just like a guinea pig." Perhaps because the experiment failed, he had to kill Song Huchao and burn his body. ”

Lao Lu pinched his chin with his right hand, tucked his cheeks, nodded slightly, and said, "Well, if you say that, it's more likely." I've always had a question, do you say that the arsonist who burned He Yunjing's house was the staff of the secret experiment, or was it someone else? Why didn't they just burn down the chamber? ”

I had already considered this question for a long time, and since Lao Lu asked, I said: "The arsonist is obviously the person who carried out the secret experiment. As for why they didn't just burn down the secret labs? That's because after the experiment fails, the lab should be filled with unknown and terrible germs. In this case, humans can no longer enter the laboratory. The only way to destroy these viruses is to burn them at high temperatures, so the lab personnel set the entire room on fire and used it to kill the virus. ”

Lao Lu snorted: "Then this crazy scientist, it seems that he still has a little human conscience, and he will not spread the terrible virus to the outside world and plunge our world into a crisis." ”

I smiled and said, "Comrade Lu, it turns out that you have also watched movies like zombie viruses!" ”

Lao Lu said: "When I was young, I just played the game "Resident Evil". ”

I smiled, because I knew that when Lao Lu was young, he used to improve his detective thinking and courage by playing decryption and horror games. Of course, this unreliable method was taught to him. Now it seems that this method that I casually talked about at that time, Lao Lu actually learned a lot of useful things from it. So, if a person thoroughly delves into a craft, he will be able to seek out the same areas as the craft from various fields and learn from it.

I took the information in Lao Lu's hand and looked at it, and said: "He Yunjing is an employee of the Tengyun Chemical Factory, and Song Huchao is a cleaner of the Tengyun Chemical Factory, so is this Tengyun Chemical Factory also related to this arson case?" Moreover, the female corpse that burned her face was burned by red phosphorus, so does the red phosphorus have anything to do with the Tengyun Chemical Factory? We need to solve these problems one by one. ”

Lao Lu said: "Ouyang, there is always a long list of problems you listed, and I also know that after these problems are resolved, the case will basically be clear." But I think we still have to take it step by step, although the case of burning the female corpse and the arson case are now two cases at the same time, but we still have to have a plan to solve it. ”

I said, "I'm probably a little too anxious, so I thought about both cases." ”

Lao Lu said: "It's okay, just think of it, I'll help you sort out the process and sequence of detection." Although I don't have as strong reasoning skills as you, I am a professional criminal policeman, and I also have my own set of means to solve cases. ”

I patted Lao Lu's arm and said, "For so many years, haven't we all cooperated like this." ”

Without further ado, Lao Lu, a faction of action, personally drove to Bayu United University of Science and Technology.

I was very impressed by this university, especially the gates of the university, because there was a killer who mysteriously disappeared in front of it, and I still don't know how he did it.

At this time, there is a big red lantern hanging on the school gate, but this lantern really has a personality, just such a lantern. This lantern is nothing special, with a red face and yellow ears, very ordinary. But it was big, very big, so big that it was weird, and it hung in front of the gate of this school, so that no one passing by could not look at it.

"Oh my God, this lantern is terrifyingly big!" Lao Lu threw himself on the steering wheel and looked up at the big lantern.

I smiled and said, "This school is quite creative, and a lot of ordinary things, as long as they become very big, they are very eye-catching. Remember the big yellow duck before? That's it. ”

Lao Lu sat up straight, glanced at me, and then honked the horn a few times. We've been outside the school for about thirty seconds, and we still haven't seen the doorman open the automatic door.

The horn sounded several times, but the silver-white automatic door did not respond.

I opened the car door and said, "I'll take a look." ”

Hearing Lao Lu's 'um', I stepped out of the car door, but I didn't close the door.

I first looked up at the surveillance camera on the gate, because this camera once made a deep impression on me, and it was under this surveillance camera that the killer disappeared.