Although I didn't understand the calculation methods of Mu Zihan's long discussions, it sounded like a set of things that made sense, but I also had my own ideas, and I couldn't fully agree with his point of view, so I thought about it and said, "That's not necessarily." Pen, fun, pavilion www. biquge。 infoIs it possible that the killer's blood dripped to the ground before the door was opened? After all, after he attacked Inspector Chu Hengyu, he also needed to do a lot of things, such as overturning the bookcase, disguising it as an accident, and opening the curtains as you just said, these things should not be able to be completed in a minute and a half. ”

The more I talked, the more I felt that my ideas were more realistic than Mu Zihan's inferences, and in the end I even became a little self-righteous and proud.

"I also thought about what you said, and at that time I thought it was indeed possible, and even very likely. However, after taking a closer look at the bloodstains on the door, I disproved this hypothesis. As he spoke, Mu Zihan squatted down and pointed to the bloodstains at the bottom of the door and said, "Look here, this is like the tip of a needle, the blood is like a needle, and the blood is the trace left by the blood that slides from the bottom of the door, pulls it into a filament, drips onto the ground, and finally breaks." This is something that takes a long time, without any interference, to take place. ”

With that, he stood up and closed the door of his study. Sure enough, the tip of the bloodshot and the slight bulge in the middle of the drop of blood on the ground could perfectly correspond together, invisibly connecting into a straight line perpendicular to the floor of the room.

"See." He went on to explain: "If the murderer had left the study from here after setting up the scene. Well, it will never be like this. ”

Yes, it is indeed as Mu Zihan said, if the murderer left here after committing the murder, then when he opened the door, a tiny air flow would inevitably be formed in the crack of the door about 1cm wide under the door, that is, the wind.

Although the breeze is so faint that it may not even be felt by the human body, it will disappear as soon as the door is still. However, at that time, the blood was also unstable, and although it was coagulated, it was not completely dried up and coagulated, and there was a certain amount of softness and stickiness.

In this way, the wind, under the action of inertia, will at least bend and deform along the bottom edge of the door, if not enough to blow the hair-thin blood to the edge of the door. It will never be possible to maintain a natural vertical downward posture as it is now.

"If that's the case, then why didn't Fang Ling let it deform when they slammed the door?" I actually agreed with Mu Zihan's inference in my heart, but I questioned him so proudly just now, and now I want to change my mouth and agree with him all of a sudden, I always feel a little uncomfortable in my face, after all, Fang Lingke has been watching from the sidelines, so I am a bit of a dead duck with a hard mouth.

"It's very simple, because when Fang Ling and the others slammed the door open, this drop of blood had already completely dried up and coagulated, so with the wind caused by the door opening and the almost massless inertia caused by opening the door, it would have broken it at best, but it would never have been possible to bend it in any way. And as it turned out, it didn't even break. Mu Zihan seemed to see that I was just arguing with strong words, and said impatiently: "So, you can shut up." ”

After speaking, he opened the door of the study again, motioned for us to follow him, and said while leading me and Fang Ling to the door of the room: "As for the second secret room I mentioned, the key is the anti-theft lock at the main entrance. ”

"Oh, you mean, because the security door was also locked at the time, the whole room was a big secret room, and the study at the scene of the crime was a small secret room, so this was a double secret room murder case." Although I just ate deflated and was scolded by Mu Zihan to shut up, I won't really shut up so obediently.

Thinking that because of her lack of ability in the Manor on the other side before, under Hu Feifei's questioning, she couldn't even make a promise that was enough to convince her, and after feeling the powerlessness that went deep into the bone marrow, what was such a little shame? Anyway, I had already decided in my heart that I had to absorb as much knowledge and experience as possible about criminal investigation and other aspects as soon as possible, so as to strengthen myself and improve myself. The next time you find yourself in that situation, you won't feel so incompetent again.

And the best way I can think of to improve myself is to "ask more and talk more", especially in the process of solving cases. Even if you will be disgusted by Mu Zihan because of this, you must say your thoughts and ideas and ask the questions you want to ask.

Even if it's wrong, that's okay. As long as you understand what is wrong, why it is wrong, and how Mu Zihan's correct conclusion is deduced. In this way, the next time I encounter a similar situation, I can minimize the need to make mistakes again and make correct inferences as quickly as possible.

"That's right." Mu Zihan looked at me and replied: "When I first arrived here, I noticed the lock of this security door, although it was twisted and deformed because it was forcibly pried open. However, it can still be seen that it is not only double-insured, but also locked in the inner insurance. I don't know if you know about this old-fashioned anti-theft door lock? It has a great feature, that is, it is possible to lock the door from the outside with a key, however, the inner safety must be turned from the inside to the small knob in the lower left corner of the inside of the lock to lock. Moreover, once the inner safety is locked, it is not possible to open the door from the outside, even if there is a key. ”

"Even so, there's no guarantee that this room must have been a secret room at the time." I thought about it and said, "Although this security door is indeed locked from the inside, it is a two-bedroom room with so many windows that can lead to the outside. This is another old community with poor property supporting facilities and no security guards patrolling the night. Even if the house is on the third floor, the murderer can get a rope to tie to the burglar window, and then follow the rope downstairs. Moreover, as long as you use a double-strand rope and cleverly use the principle of pulleys, even if you go downstairs, you can retract the rope as long as you pull the other end of the rope. ”

The method of the principle of double-strand rope and pulley is actually very simple, that is, the fence of the anti-theft window is used as a fixed pulley, and the two ends of a rope are passed through it at the same time and hung downstairs.

Later, when the murderer went downstairs with a rope, as long as he grabbed the two strands of rope that also hung downstairs together in his hand, it would be the same as a rope and would not slide.

And when he got downstairs, he only needed to separate them again and pull any of them, because it was the same rope, so it was easy to retract the rope from the burglar window without leaving any traces.

(To be continued)