Chen Fan also told us that this case was probably really done by Yun Qing, otherwise Yun Qing should not have disappeared at this time. Chen Fan told us that the police went to Yunqing's new residence and forcibly broke down the door, but Yunqing was no longer at home, and no one answered the police call Yunqing.

I asked Chen Fan if Yunqing's Hong Kong ID card and money were taken away, Chen Fan said no, the police found her ID card in Yunqing's house, and also found a large amount of cash in the safe, those money, should have been obtained by Yunqing these days, the police have listed the money as stolen money.

Soon, I judged that Yunqing might not want to escape, otherwise, she wouldn't even bring her ID card, even if she wanted to smuggle out of the country, but without money, she would definitely not be able to do it. I thought about it and asked Chen Fan to continue to keep in touch with the police, no matter where Yunqing went, she had to be found.

Chen Fan immediately went to do so, and while the police were searching for Yunqing's traces, Chen Fan took us to the scene of the crime again, and this time, we went in openly. The old lady said that in those days, one night I heard a very noisy TV, and as soon as I entered the door, I turned on the black and white TV and turned the volume to the maximum.

In this old building, a few days ago, only Lao Ma and Lao Jiu lived on the seventh floor, and the other rental houses were empty. The black and white TV, very noisy, noisy sound, really upset people, I asked Chen Fan to listen to the old lady's rental house next door to prove whether the old lady was lying.

Chen Fan glanced at the bloody handprints on the wall, shook his head, and said that he didn't dare to go alone. Sure enough, this caused Luo Feng to scold again, and Luo Feng didn't waste time, he said that he would go in person. A few seconds after Luo Feng walked out, I heard a loud noise, the old lady's house was locked, and Luo Feng kicked it open directly.

Soon, Luo Feng came back, he said, the sound insulation of this rental house is indeed very poor, although the wall is separated, it seems to have no effect. I pondered for a while, but unfortunately the old lady couldn't remember exactly when she heard the sound of the TV, otherwise, we might have found some clues. The TV is so loud, it is likely that the murderer made the sound when he committed the crime, and the time when the old lady heard the sound of the TV may also be the time when the murderer committed the crime.

The old lady heard a total of three sounds: the sound of mahjong colliding, the sound of the TV making noise, and the sound of moving something. According to this soundproofing effect, the old lady's hearing is good, and it is not surprising to hear the sound of mahjong collision in the quiet of the night. I wonder what the last voice the old lady heard.

I searched for rental houses, and although the rental houses were basic, there were still a lot of things such as tables and chairs. Moving anything may make a sound, and the old lady can't remember what the characteristics of the sound are, and it is difficult to determine at once what the old lady is hearing about the sound of moving an object.

Chen Fan thought of the stupidest way: try them one by one. This quickly led me to deny that it would be too much time to waste until the last minute, and that it would likely inadvertently destroy the crime scene, which must be left as intact as possible until all the key clues are unearthed.

Chen Fan asked me what to do, I thought about it, and asked them to wait for me here. With that, I went to the old lady's rental house next door, and the layout of each rental house in this old-fashioned house was similar, and the old lady's room was a little dirty. She has inconvenient legs and feet, and she certainly doesn't always clean her room.

The sound of mahjong colliding lasted for a few days, and it lasted for a long time every day, and the old lady was upset about it, so it was not strange to remember, the sound of the TV was so noisy, and the old lady was under my guidance, and it was not strange to recall. The old man loves to be quiet, and it is based on this psychological characteristic that I gradually ask questions.

The old lady recalled that the sound of moving the animal body did not last long, and it was not an earth-shattering noise, but the old lady still remembered it under my guidance. According to psychology, the more people care about something, the deeper the impression will be, even if they forget it inadvertently, but through guidance, it is still possible to remember it.

Since the voice of the animal body was not loud, and it did not last long, but the old lady still remembered, this showed that at that time, this sound had also seriously affected the old lady, and in the old lady's ears, this sound was definitely noise. However, if it is in normal times, moving an object and stopping it quickly should be normal, so that it will not make the old lady think that it is noise.

Immediately, I thought of the reason, and I strode into the old lady's bedroom. This subtle, short sound will affect the old lady, and it is likely that the old lady is preparing to go to bed at the time, or has entered a light sleep state, and the sound wakes her up. In this way, everything can be explained.

The old lady's bedroom is located on the west side of the rental house, and the east side of the crime scene is connected to the old lady's bedroom, which is a bathroom. If it is said that the murderer created the sound of mahjong collision in order to link the case with ghosts and gods, and created the sound of the TV to cover up the sound generated when the crime was committed, then the body of the animal is likely to hide some clues.

According to the old lady's description, the voice was very subtle, and it was clear that the murderer was very careful and did not deliberately make a sound. Mahjong and moved objects are obviously not of the same rank in terms of mass and volume. However, the sound of mahjong collision is very crisp, and it is not surprising that the old lady will hear it more clearly.

If the murderer deliberately wanted the old lady to hear the sound of the moving body, then he would not only deliberately make a small and brief sound, but let the old lady hear the sound of mahjong colliding. This made me even more sure that it was the sound that the murderer accidentally produced, and there are some sounds that cannot be avoided absolutely. The murderer must have moved the object very carefully, but it could still be heard by the old lady, indicating that the source of the sound was very close to the old lady.

Most likely, it is a bathroom separated from the old lady's bedroom by only one wall.

At this point, I immediately returned to the scene of the crime. Luo Feng and Chen Fan were already a little anxious, they asked me if I had observed anything, I nodded, and walked into the bathroom. In the bathroom, there is only an old-fashioned washing machine that can be moved.

Everyone had already put on their gloves, and I asked them to carefully lift the washing machine and set it aside. Chen Fan and Luo Feng did so, and after the washing machine was moved, I carefully observed the back of the washing machine. The back of the washing machine, which was originally attached to the wall, was a blind spot for vision.

The front and sides of the washing machine, as well as the inside of the washing machine, I had already observed it when I first came, and I found no suspicious traces and clues. The washing machine seems to have not been used for a long time, and the back is very dirty, all green and oily, and there is a bad smell.

"See what?" Luo Feng asked me. I frowned, and was about to answer, when my gaze caught up in a corner of the ground. The plastic water pipes in this bathroom are all exposed to the ground, which is generally the case in old-fashioned houses, and I found it when I first came here, and I didn't suspect it at the time.

But now, I'm suspicious. The plastic pipe, which was installed at the foot of the wall, the pipe, was about 2 cm to 3 cm in diameter, and I found that there were two sections of black tape wrapped around the pipe that was covered by the washing machine, and the plastic pipe, which was obviously damaged, was then picked up and wrapped in plastic tape, so that when the water was crossed, the water would not flow out.

The plastic sheeting looked a little old, so I turned around and turned on the faucet, and immediately the sound of water running through me sounded. I looked closely at the two places where the tape was wrapped, and I didn't see any water leaking. After I turned off the water, I told Luo Feng and Chen Fan that the tape had only been wrapped recently.

Although the adhesive tape looks a little old, if the adhesive tape is really wrapped for a long time, after many times of water, the adhesion will be weakened, so that the waterproofness will gradually weaken, and it will never be able to do drip-proof, the adhesive tape is just ordinary adhesive tape, so the old surface of the adhesive tape is just a simple treatment.

The plastic pipe is hidden behind the washing machine, and I speculate that the killer may have moved the washing machine to get the pipe, and then wrapped the pipe around it and covered it with the washing machine. Chen Fan shook his head: "But, what's the point of doing this, the tape will leak one day." ”

"But that was much later. The murderer has no way to guarantee whether the police will turn on the faucet when they investigate the scene, and once the water leaks, the police may investigate deeply to discover the secret hidden behind the washing machine. After explaining, I began to carefully unwrap the tape.

Chen Fan had already prepared a special identification bag, and I put the adhesive tape in the identification bag, and when I removed the water pipe, the stagnant water inside seeped out. The pipe, which is about 15 centimeters long, is pretty sure that it is not a natural breakage. In criminal cases, there are all kinds of criminal tools, and I am familiar with some tool traces.

The water pipe is naturally damaged, and the damage is definitely not smooth, and there will be cracks, but the two ends of this section of the water pipe are very flat, and they are obviously cut with sharp weapons. I put the hose into the identification bag again, Chen Fan put it away very carefully, and found no other strange clues, and we exited the bathroom with an unpleasant smell.

"Brother Han, do you think this is the murderer's tool for committing the crime, a water pipe, how to kill someone?" Chen Fan shook his head and asked me blankly.

I replied, "Not necessarily, there are all kinds of signs that this section of water pipe is very suspicious, so let's take it back and identify it first." ”

Luo Feng was also puzzled at this time: "If you kill someone with a water pipe, such a small water pipe is easy to carry, and the murderer doesn't need to take a water pipe from the crime scene." ”