My series of questions made both of them fall into deep thought, and they also made me very puzzled.

But at the end of the day, it's about where so many large planks come from, and how the sound of hammers disappears.

After a while, Lin Qiaoling seemed to have figured it out, and said to me: "Actually, it's very simple, where did so many planks come from, we can investigate whether there were any residents in this neighborhood or the entire community who were doing renovation before Liu Kewei was killed." ”

Lin Qiaoling touched the iron nails on the wooden board, and continued, "There is also a question about iron nails, in fact, it is not only an iron hammer that can nail iron nails into the wall, but also a wooden hammer, as long as you find the structure of the wall, and find out the size of the reinforced concrete of the entire wall, you can easily fix the wooden board, but this super glue, I think it should be that the murderer is afraid that the iron nail is unstable, and it has been driven into it before the wooden board is nailed into the wall, and there is another you can see, the nail in is not without rules, Basically, there is a difference of 20 centimeters, which is very much in line with the scale of the current building. ”

After listening to Lin Qiaoling's analysis, I subconsciously stepped forward and took a closer look, and blamed me for not understanding, but now that I was reminded by Lin Qiaoling, I really want to have some truth.

"It seems that there must be a secret behind this plank, but Zhou Jun's house has such a high floor, he just doesn't know how to climb up." I still have some admiration for the courage of the murderer.

Lin Qiaoling said, "It doesn't take too much effort, the floor is high, and the murderer can go down from the roof." ”

Speaking of this, I suddenly thought of something, "If it comes down from the roof, there must be traces of hanging ropes on the roof, let's go to the top of the building to see, maybe there will be an unexpected gain." ”

Thinking of this, the three of them quickly rushed to the top of the building.

Generally speaking, the sanitation of such high-end communities is still relatively clean, but all communities seem to have a drawback.

That is, the hygiene of the roof is generally not paid attention to.

I thought to myself, as long as the community cleaning staff did not clean the roof after Liu Kewei was killed, then there must be some clues on the roof.

Everyone soon came to the top of the building, the roof is very wide, basically it is not like the general community, drying clothes or planting some flowers and plants, in the four corners of the roof, there are four large white columns, the height is about three meters.

There are also thick steel bars on the edge of the roof, which seem to be used for protection, which creates a good space for the murderer to commit crimes.

Zhou Jun's residence was on seven floors, the highest was only eight floors, and the roof was basically empty.

As I thought, there were traces of rain washing away from the emptiness, and there was nothing special about it except the columns.

I instructed: "It seems that no one has come up on the roof, let's look carefully to see if there are any clues, especially the traces of the rope being tied, if you find it, don't touch it with your hands, and take a picture with a camera later." ”

Lin Qiaoling and Liu Zhi did not hesitate and searched separately.

I started my search on the left side, and the first thing I found was a large cylinder.

This is very thick with the big cylinder, I compared it, and it is estimated that there are three fewer people who may not be able to hold it.

How could such a thick cylinder stand here, there is no special mark on it.

I really didn't understand it for a while, I looked around the big cylinder and looked again, but I didn't find any traces, so I went somewhere else in a daze.

The steel bars on the edge of the wall are rusty, but they are as thick as a wrist.

I carefully looked at the steel bars that were fixed to the wall, trying to find useful value in them.

However, Tiangong was not beautiful, and after watching it for more than ten minutes, his eyes were also painful, and he didn't find any clues in it.

Lin Qiaoling and Liu Zhi walked over to me, both shaking their heads helplessly.

"It's really a strange thing, could it be that the murderer has the key to Zhou Jun's family?" I said.

Lin Qiaoling said, "Impossible, the door lock of Zhou Jun's house is very strange, not like a lock in the general home, it seems to be specially designed, this kind of lock is like a chain buckle, and the material is consistent, even if you have a key, it may not be able to open." ”

To be honest, my confidence in the fact that this case can be solved is getting slimmer and weaker, and the more I think about it, the more angry I become, and I happen to be next to a pillar next to it, and I kick it in one kick.

But this kick felt wrong, and Lin Qiaoling and Liu Zhi also seemed to see that the pillar was unusual.

I just kicked the pillar unintentionally, only to find that the whole pillar seemed to be hollow.

Lin Qiaoling walked to the pillar and knocked lightly with her hand, but she felt that the strength was too small, so she added a little more force.

At this time, an empty sound came from inside the pillar, and Lin Qiaoling said, "This pillar is estimated to have a problem." ”

I didn't speak, but walked over to the other pillars, knocked with my hand, and found that each pillar was hollow inside.

"It seems that the murderer did not go down from the roof, and I guess there is a passage in this pillar that leads directly to the next floor." ”

"It's not impossible for you to say that, but if you look at this pillar, although they are all hollow, none of the pillars have any traces of being chiseled." Lin Qiaoling looked at the pillar, trying to find out the root of the problem.

I looked around the four large cylinders again, and it shouldn't be without problems, and I observed while touching them with my hands.

Suddenly, I felt some unevenness on the cylinder on the right, picked it with my hand, and found that there was a joint layer on the cylinder, and I tore the bottom half of the whole cylinder with such force.

Lin Qiaoling's face was shocked, and she said in an incredible tone, "It turns out that the epidermis of the pillar has been deliberately blocked, and it can't be seen by the naked eye at all." ”

I was also surprised, this murderer is really cunning, no wonder so many police officers didn't find out in the first place.

Because although the whole column is hollow, the piece that I tore apart was made of wooden planks to make a door, which can be opened from the outside.

I gently opened the door under the column, and it was pitch black, and I was about to poke my head in to take a look.

At this time, Liu Zhi grabbed me, "Wait a minute, be careful of an ambush." ”

I was stunned, looked at Liu Zhi, and said in surprise, "How can you say that?" ”

At this time, Liu Zhi took off the coat he was wearing, tied it together, and threw it directly into the door.

Because Liu Zhi wears leather clothes, he is a little heavier than ordinary clothes.

The clothes fell into the downstairs room, making a very clear sound, but I could tell that this pillar must have led to the eighth floor, but the ambush that Liu Zhi said did not happen.

But Liu Zhi's heart is like this, and he feels that if he can pay more attention, he must not be afraid of trouble.

Just as I was about to look inside again, the unexpected happened.