Not long after the drunk man was sent there, Shen Cheng felt as if he had vaguely guessed something, so he had been sitting here and meditating. Shen Cheng said that the time when the murderer committed the crime must be at night, and he is very sure that the more people there are, the more difficult it is to hide.

I can't count how many pairs of eyes there are, and the murderer doesn't know who to watch out for, so the possibility of committing a crime during the day is almost zero. Relatively speaking, at night, there are few people, and the murderer may use some way to fool the pass. It's just that Shen Cheng didn't come up with it for a while. While talking to me, Shen Cheng smoked several more cigarettes.

After a few days of running, Shen Cheng also looked haggard. Shen Cheng didn't mean to go back immediately, he told one of the policemen, saying that he would notify him as soon as the drunk man woke up. Shen Cheng seems to have put his hope on this drunken man, and now, wanting one more clue has become an extravagant hope.

Shen Cheng asked me if I wanted to go to the power supply bureau with him again, I thought about it, we also went to the place where Miao Miao was killed several times, but in the end we didn't find anything. However, Shen Cheng insisted, and I went with him. When I arrived at the power supply bureau, the sky was already cloudy, and the distant sky, dark and light were intertwined, and the dormitory building of the power supply bureau was dilapidated.

Here, no one has lived here for a long time.

I suddenly remembered the scene when Zhao Da and I were keeping vigil here that night. At that time, everyone was scared into a cold sweat. When I thought about it, Shen Cheng had already walked in, he turned around, called me, and asked me what I was thinking, I shook my head and followed.

We climbed four floors of stairs in a row, and finally arrived at the door of room 414, Shen Cheng pushed the door open, he didn't waste any time, and immediately began to investigate. We have determined that the one who killed Miao Miao was Xiong Wancheng. Of all the cases, this one is the only one that is located above the first floor.

Shen Cheng observed the room one by one, refusing to let go of any corner, and I also followed Shen Cheng to search. Those policemen seemed to have given up, and they also followed Shen Cheng several times, searching again and again, and again and again to no avail and disappointed, which made them inert.

The house was very small, but it took us dozens of minutes to complete the search again, and the result was still no clues, at this time, a policeman told Shen Cheng that there was news from the hospital, saying that the drunk man had woken up. Shen Cheng sighed: "Let's go and ask that drunk man first." ”

I nodded, and while walking out with Shen Cheng, I said casually, "Let's leave here first." ”

Shen Cheng's figure stopped suddenly, he turned his head suddenly, I asked him what was wrong, and he asked me not to speak. Immediately, Shen Cheng began to pace back and forth in place, he seemed to be thinking about something carefully, and my heart trembled faintly, I always felt that Shen Cheng's thinking this time would bring breakthrough thinking to the case.

Sure enough, Shen Cheng finally raised his head, but instead of speaking, he walked to the window on the other side of the house. Under our gaze, Shen Cheng opened the window, turned over and jumped out. My heart was stunned, this is the fourth floor, if you fall, the consequences are unimaginable.

I immediately rushed over, Shen Cheng did not fall, his upper body was exposed, just outside the window, I walked to the window, looked down, four floors, very high, where Shen Cheng stepped on, was a cement slab protruding outward, I looked up again, above the window sill, there was also a cement slab.

General residential buildings have this structure, which is used for the rain downstairs on the one hand, and for the construction personnel or construction maintenance personnel to work at height in the later stage. Looking left and right, there is a cement slab in front of the window sill of each house, each cement slab is two or three meters long, and the width is about half a meter long, and the distance between the cement slabs of each house is about one meter.

I vaguely understood what Shen Cheng meant, and he suddenly trotted forward two steps and jumped over. My heart twitched, and within a meter of it, if I wasn't careful, I would fall from a tall building. At a distance of one meter, an adult can jump over with a little force, but at this height, it is always shocking for others to look at it.

I watched Shen Cheng leap forward step by step, and every time he jumped over a cement slab, Shen Cheng would look at the window in front of the room for a while, and after staying for a few seconds, Shen Cheng would jump back in that direction. Because of the tragedy, no one lived in the dormitory building of the Power Supply Bureau, and Shen Cheng's behavior did not cause trouble to others.

Suddenly, Shen Cheng beckoned to us and let us pass.

We immediately ran out the door, and soon we entered the room where Shen Cheng was standing on the cement slab. The window is not closed, and if you look closely, it is not that the window is not closed, but that it cannot be closed, and the latch of this window is broken. Shen Cheng was still standing outside, it was very windy outside, and it was already bright, so I asked Shen Cheng to come in first, Shen Cheng nodded, turned over and came in.

Shen Cheng told me that he wanted to understand how Xiong Wancheng had escaped from here.

I nodded at Shen Cheng: "I see what you mean." ”

In the old house, the windows are composed of wooden frames and glass, and they are open and closed inside and outside, rather than pushed and pulled left and right. Inside the window, there is a latch that can be moved up and down, and the latch is snapped downward, but if you pull it up and turn it to the left, the latch will not be pulled down, but will remain pulled up.

This is a very common latch, and such a construction is also very common.

However, in this room we are in, the latch is broken. Shen Cheng's hand stretched out the window and said to us, "There are some dents on the wooden frame outside. "I leaned my body out, and sure enough, I found the dent that Shen Cheng said.

The window consists of two leaves, and when the window is opened, the two leaves are facing outward. The dormitory building of the power supply bureau is very dilapidated, and the wood on the windows is also somewhat decayed. The dent that Shen Cheng said was where the two window leaves were connected when they were closed.

I frowned, looked at it for a while, and then glanced at the damaged latch, which was the socket of the latch. The slot is a small hole, and when the pin of the latch is inserted into the slot, the window is closed, but when it is not inserted, the window can be opened and closed freely.

The edge of the slot, which has been damaged, traces of damage, stretches in the direction of the outside of the window.

"There are only two possibilities for such traces, one is that the person inside, pushing hard outside, will cause the traces of slot damage to extend to the outside of the window." Shen Cheng paused and continued: "Another possibility is to pull from the outside, which is the same as standing inside and pushing out, the direction of the force. ”

I nodded: "Do you think that someone is standing outside and pulling the window, because there is not enough contact area, so it is more difficult to pull on the outside than to push on the inside, so there is a dent on the wood outside, and the dent is where the person and the window touch." ”

Shen Cheng nodded: "The wood that has decayed, whether it is the groove of the latch or the wood outside, when the force is large, it will inevitably leave traces." ”

Shen Cheng immediately told one of the policemen to contact the staff of the power supply bureau who lived here to see if the window had been broken by himself. The policeman immediately ran out and did so, Shen Cheng walked quickly, he took us, and returned to Miao Miao's house.

"What you just said reminded me that we have been thinking about how the secret room was created and why there was no blood stain on the other secret room scenes, but we ignored the most essential question, how the murderer left." Shen Cheng said to me.

It turned out that Shen Cheng suddenly stopped his body because he remembered this.

"There is a feature of the scene of the secret room, whether it is the secret room where Xiong Wancheng committed the crime or the secret room where Rena was killed, the door is locked with iron chains from the inside." Shen Cheng said: "But have you thought about it, why the windows are not locked with iron chains." ”

With Shen Cheng's reminder, I quickly answered his question: "Because he is leaving the crime scene." ”

Shen Cheng nodded in agreement, he said, the scene of the murder, only, except for the wall, is the door and window.