According to the information inquired by the criminal police to the residents, the residents only heard a loud noise at about ten o'clock last night, and other than that, the residents responded that they did not hear any other unusual sounds. Due to the high height and the principles of physics, it is completely different to try to replace such a large stone with other objects of unequal mass.

So, I ruled out the possibility that multiple people were lifting the stone and throwing it down and hitting the victim.

When I got to the next floor, Shen Cheng was just about to go down, and since I stayed on the top floor for a while, he was faster than me. Shen Cheng smiled at me and immediately went to the next floor. I'm not in a hurry, the case has just begun, and I won't let go of any clues.

It's the same with this layer, there are no big stones except cement and sand. For construction, some floors will be hoisted with some large stones, but this requires the cooperation of machines or many workers on the construction site. It is unlikely that the stone was carried up by the murderer, but it is more likely that the murderer used the large stone that was already in the floor.

I carefully surveyed this floor, and like the top floor, it was so far away from the ground that I could barely see the shadow of the detective below, and there were no particularly serious friction marks on the edge of the floor, so I quickly rushed to the next floor. Just because it's a small possibility doesn't mean it's impossible.

So I asked the criminal police to inform the people in the identification department to extract the traces layer by layer from the top floor, because the traces of friction may have been covered up by the murderer in some special way, and even said that the murderer used a certain method to throw the boulder down at such a high place and hit the victim accurately, all of which need to wait for the police to identify the traces.

When I entered the building, I had pretty much ruled out that it was an accident. This is a relatively formal construction site, and even if the construction party is not thoughtful during construction, it will not be careless enough to put a boulder of this size on the edge of the floor, because this will bring a threat to the lives of the construction workers.

Construction has stopped, and rumors of haunting on the site are rife and no one will be in the building late at night, ruling out that someone has accidentally dropped a boulder to the ground. The so-called accidents, even if they are caused by force majeure factors, such as earthquakes, strong winds, etc.

There was no earthquake in Chongqing last night, and if it was wind, how strong would it be to be able to blow a boulder of that size and weight from the horizontal ground to the downstairs.

After all the analysis, I am even more sure that this is a murder case!

When I continued to the next level, the criminal police had already rushed up with the people from the Identification Department, and they were holding tools in their hands, ready to extract the traces of the scene according to my wishes.

Shen Cheng's speed was much faster than mine, I walked down several floors in a row, and finally, I saw Shen Cheng's figure stopping at the thirteenth floor. He was still standing at the edge of the floor, he took off his police hat, the wind from the tall building blew the corners of his clothes, and he stood in the corner, looking down at the floor.

Although Shen Cheng's speed is fast, he is very careful when walking, and he walks along the edge, so as not to destroy the potential traces at the scene and add unnecessary interference to the police's trace identification.

I walked to Shen Cheng's side and followed his gaze to the ground, and there was a friction mark on the edge of the floor floor, and the friction mark extended to the middle of the unfinished house. The marks were not very noticeable, and they were covered with sand, but in the full light, we could still see clearly.

The big stone was irregular, square, angular and unsuitable, so it was not suitable for rolling. If you want to push a large rock down and hit the victim with precision, you can only use it to push, which is why there are friction marks on this layer. I bypassed Shen Cheng and looked down.

Although the relative height has been reduced to thirteen floors, the absolute height is still very high.

Seeing this trace, I can almost be sure that this is the original location where the boulder landed, but a new question arises as to how accurately the boulder hit the victim. By chance? I don't quite believe that a murderer would aimlessly push a large rock down from such a high place, just to kill by luck.

Shen Cheng was also looking down and pondering, if my guess was correct, he was thinking about the same problem as me.

After a while, the people from the forensic department had already reached this level, and as we deduced, there were no suspicious traces on the upper floors. And on this layer, the only traces that can be seen with the naked eye are the long friction marks on the ground.

"Focus on surveying this layer to see if there are any potential footprints or fingerprints." Shen Cheng gave the order, he didn't look at me, and continued to go down.

I also followed, the target had been determined, and the next floor survey was very fast, and it didn't take long for Shen Cheng and I to come out of the door on the first floor.

The body was still lying on the ground, and the officers who followed the police had already surveyed the entire construction site.

In the evening, the police investigation was almost over, and Shen Cheng and I returned to the police station with the body. There were many people who were investigated by the police as we returned, and as soon as we returned to the police station, the criminal police began to question those people.

Shen Cheng and I personally questioned the person in charge of the first discovery of the body and the construction party.

The girl who found the body lived near the construction site, and her confession was the same as what the police told us. Seeing the bloody corpse scene, the girl still hadn't come back to her senses. After questioning, the girl signed and left the police station.

"Well, Professor Li, I have a clue." Shen Cheng asked me.

The police obviously encountered a problem, but Shen Cheng still had a relaxed look on his face.

"There are three issues that must be addressed first. First, how the killer killed the victim in the air. Second, the identity of the victim and why he showed up at a haunted construction site so late. I said to Shen Cheng.

According to the preliminary investigation, it is very likely that the deceased was killed by a large stone falling from the thirteenth floor at about ten o'clock yesterday night, but this is only speculation, and the specific cause of death can only be determined by the identification results and the autopsy report.

Shen Cheng nodded, he took my words and said the third point I wanted to say: "Third, whether the haunting of the construction site and the murder case are related." ”

Shen Cheng and I are in the same step, although we are competing, we both decided to start with these three questions.

Police have sent people to find the identity of the deceased, but so far, no family has come to claim the body. Intensive appraisal and inquiry-based work continues. After a short break, the person in charge of the construction party was brought into Shen Cheng's office, followed by several workers.

The person in charge of the construction party is a fat man, with a mouth full of oil, and at a glance he knows that his life is quite moist.

The fat man told us that since the construction site stopped ten days ago, they have never been to the construction site again, and the construction party has only contracted someone else's construction project and asked workers to carry out the construction. Because the site is haunted, both the construction party and the workers refuse to carry out the work.

At first, the construction party also wanted to make money and forced the workers to work, but once, after the fat man saw something unclean with his own eyes, he no longer dared to stay in that construction site. For so many days, he took those workers to work on another construction site, and last night, he accompanied those workers to work overtime until midnight.

The fat man said this, apparently to let us know that he had an alibi. Actually, I didn't have much suspicion of this fat man, if he wanted to kill someone, it was not a wise choice to commit a crime at his own construction site without escaping, because the police would find him immediately.

"You said you've seen something unclean, what's the matter?" Shen Cheng interrupted the fat man's words and asked.

At the mention of this incident, the fat man and the workers present were all pale with fright. If you don't see it with your own eyes, it's hard to imagine that a big man would be scared like that, for no other reason, because these people have seen the so-called: ghosts with their own eyes.

One of the first to notice the haunting of the factory was a worker who was at the scene, and he told us about the night......