On this day, the bureau received a report that residents in a certain community were killed, and the two immediately rushed to the crime scene.
The victim Wang is the general manager of a credit company. Although the crime scene is a mess, you can still see the luxury.
And the erosion of lifestyle. The deceased squatted in a big pool of water, which turned out to be a huge goldfish bowl.
After breaking, the leaked water spilled all over the floor. Afei looked at this scene and was about to open his mouth to analyze it when he was immediately interrupted by Xiao Liu:
"Don't interfere with my work, please keep quiet when taking evidence!"
So Afei stood by and made a rough observation of the scene: the deceased was lying on his back in the water with a paper cutter in his chest.
Blood left a spot on the desk, and Afei suddenly noticed a strange thing, which was found in many places on the desk.
Blood spattered, but a right angle was missing in a pool of round blood.
Another strange thing is that the clothes on the chest of the deceased left two molds, one deep and one shallow, on the coagulated blood.
Paste the footprints, and the color left by the footprints is obviously darker. Afei pondered for a moment, then carefully avoided it.
The water on the floor, continue to observe other clues at the scene.
At this point, Xiao Liu initially completed the investigation of the scene, and the two left forensic doctors and other personnel at the scene.
Go back to the police station for further analysis.
"how about it? Any ideas? " Afei asked Xiao Liu.
"I just checked the fingerprints and footprints at the scene. Besides the victim's own footprints and fingerprints, I found something new.
Three kinds of footprints, including two men and one woman, the specific results will have to wait tomorrow. I also made a slight examination of the deceased, which was fatal.
For a knife that was neither too deep nor too shallow in the chest, he almost died on the spot and left a sharp cut on the outside of the deceased's right wrist.
There is also a strange small scratch, about 10 cm above the left side of this incision. "
"In this way, the image of the murderer in my mind gradually became clear."
"Impossible! You don't have any concrete evidence and can't think of any good results now, so don't talk nonsense.
I've seen your tricks. "
……
The next day, there was new progress-the death scene report came.
1. Through the investigation of the crowd around the deceased, the owners of three kinds of footprints were determined, namely, Zhang and Ye.
. And all three kinds of footprints come and go, but there is no decisive evidence-blood footprints. One more thing.
Although the two footprints on the body are vague, they obviously look like male footprints.
Male, 25 years old, was a senior financial officer of the deceased company before his death, because Wang found that he was in danger of losing his job.
Corruption and misdeeds, but a company in Wu Mou has also done a lot of practical things, although he will be fired, but promised that he will not be fired
Arbitration.
Zhang, male, 30 years old, a business customer of the deceased, was urged to bear a grudge against Wang because of long-term arrears, but due to
I am distressed because I have no money at hand.
Ye, female, 27 years old, had an affair with the deceased. The deceased promised to divorce his wife and marry her, but this has changed recently.
I changed my mind and wanted to dump Ye. So Li has been angry with everyone she knows in the company recently.
2. The three wounds on the deceased were confirmed to be left almost at the same time; I also found a piece of debris scraped by the fish tank on my body.
3. The time of death was between 10 and 10: 30 in the morning, during which all three people visited the deceased, three people.
They all claimed that they didn't know that the other two had been here.
4. Ye in Wu Mou is familiar with each other, but Zhang and these two people are strangers. Although the deceased was closely related to Ye,
But I never mention the company in front of women. Every time I contact Zhang, I am cold and heartless, and I keep people away.
5. Information from the community administrator: When the administrator came back, he just went out on business 10 and 15.
It's 10: 20, and I don't know how long it's been since then. I only saw one person coming in and out of the gate, but I can't judge because I covered my face for this person.
I won't talk about other details.
But according to him, it takes at least 10 minutes from the gate of the community to the room of the deceased, because there is only one way to get there.
Between. There is only one elevator in the building where the deceased lives.
6. The confidential safe attached to the desk has been opened. At present, it is impossible to judge whether files, books and other things are lost.
Only one key belongs to the deceased, and only the deceased knows the password.
After reading this report, Afei asked Xiao Liu, what do you think? There are many clues now.
"Three confessions haven't come out, what can you come up with? Don't waste energy! "
"Not necessarily, I can almost find the real murderer now!"
"Oh, so, I also wrote three lines here, you just take one line, I don't believe you can do anything!
"
Afei took one at random, smiled at Xiao Liu after reading it and said that the answer was revealed like this. It seems that I am also lucky, haha!
Xiao Liu hurriedly grabbed the note and saw that Wu Mou and Yemou were both left-handed.
Excuse me: 1) Who is the murderer?
2) Describe the reasoning process
3) Speculate the whole process of the event
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Children, 2008-08-1216:11:1.
More boring ...
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Wing Elf, August 2008-1617:14: 32
This case reference: the tragedy of ellery queen X (Chapter 9), the problem of left and right hands,
And y's tragedy (exclusive way of thinking)
Facing Liu's puzzled eyes, Afei's calm voice slowly revealed the truth of the case:
Xiao Liu, what do you think is the most important thing in this case? Yes, it is the order of three people! Suppose we
On the premise of knowing nothing, there are six possibilities for a * * *. For simplicity, I will number three people, Wu Mou is W,
Ye is Y and Zhang is Z, so these six kinds may be WYZ, WZY, YWZ, YZW, ZYW and ZWY.
I want to show you the subtlety of logic and rule out five possibilities one by one. Afei smiled gently.
First, let's look at the footprints left by the body at the scene. They are the footprints of a pair of men. How to print z on this footprint?
I won't explain why I went. According to my thinking order, this is my last guess. And the left foot footprint is obvious ~)
Deeper than the right foot. Footprints are printed on the coagulated blood, that is, on the corpse. The body lay in a pool of blood.
But this footprint has no blood at all. What does this mean? Yes, this man jumped over the water on the ground and jumped on the dead man.
What does this mean? Very simple, for you who have been doing all kinds of scientific evidence for a long time, you will know that this is right-handed.
Performance, because people's instinct will be more truly reflected in the extreme tension after seeing the body, so this kind of trampling on the body
People must jump with their right foot as the support, and their left foot touches the corpse first, which is also the reason why their left footprint is deep.
As early as a few decades ago, the great ellery queen told us in the famous Tragedy of Z: the habit of being right-handed.
The foot is also the right foot. And because W and Y don't know Z at all, there is no possibility of deliberately stepping on such footprints to frame Z.
According to the note I just drew, only Z is right-handed. So, the person who stepped on this footprint is Z!
Let's take a look at the wounds on the victim. It's simple. Similarly, according to Z's tragedy, we know that the assailant held it in his left hand.
Knife, this can be proved by doing a simple experiment to prove the relative position of that small wound and wrist injury, and that
This small wound is obviously not a knife wound, or at least it won't be the knife that caused the sharp wound on the victim's wrist. but
And this second wound was left on the right arm when the wrist of the deceased was cut, and special attention was paid to it, not just a knife.
The injury height is 10 cm, so this is a wound cut by the sharp edge of something other than a blade. This thing is in
The killer's hand was 10 cm away from the knife.
That is to say, considering the second wound, we can now think that there must be some knife edge on the killer's arm.
Something with a sharp edge. What is that thing that will appear on the killer's arm, 10 cm away from his knife-wielding hand?
For the sake of logic, we think the answer is a woman's gem bracelet or a man's bracelet. Because of three injuries:
The mouth leaves almost at the same time. When the murderer kills, it is obvious that it is impossible to use his left hand first in such a highly nervous situation.
Leave the first two wounds and then switch the knife to the fatal one with the right hand, and you can draw the conclusion that the murderer used it.
It's the left hand.
According to the previous reasoning and evidence, Z is right-handed. Because Z doesn't know X and Y at all, there is no intentional use.
The possibility of framing those two people with his left hand-that is, he has no possibility of killing people with his left hand. Here, we know that Z didn't kill anyone:
Is there any problem with the above?
Liu: No.
The next tips are the open secret safe and the missing right-angle blood. Such a man with company money
Is it possible to open an important locker in front of ordinary customers and women who are having an affair? Impossible, the former is out of
Security, the latter is not necessary at all, based on "the deceased was closely related to Ye but never mentioned in front of women."
What's wrong with the company? Every contact with Zhang is cold and heartless, keeping people away. "
Therefore, the safe was opened when the deceased met W, and that right angle was natural, because it was safe
Take out a square piece of paper from the cupboard, such as some kind of bill or document, and the traces left by people will be removed after the blood is spilled.
Now let's discuss the situation in order: First of all, there are two possibilities for W to be the last guest:
In this case, the murderer must be W, because if someone in Y and Z kills someone, then the safe can't be opened, according to ".
Only one key belongs to the deceased, and only the deceased knows the password. "Then the dead must still be alive when W comes. So this
In the movie, we had a hopeless conflict: W was the murderer, but Z was the person who stepped on the body, and W was the last person to see the dead!
So here we rule out two situations.
If we continue to analyze the second case of W, there are two possibilities: Y, W, Z and Z, W, Y, W, Y.
Obviously, the latter can be ruled out, because in W and Y, the murderer is Z, and in the order of Z, W and Y, Z is not.
I may have stepped on the body-Z came first, but the man is not dead yet.
So now there are only three possibilities:
The last hint is the contradiction between the information provided by the community administrator and the testimony of the three people.
The administrator just went out for business from 10 to 10, and came back at 10: 20. After that, only one person went in and out of the gate, and the incident time was from 10 to 10: 30. "All three of them went to see the dead", so we can know.
At least two of the three people have been to the residence of the deceased from 10 to 10: 20.
There is also "it takes at least 10 minutes from the gate of the community to the room of the deceased, because there is only one way to get there." the dead
There is only one elevator in the building where you live. It can be known that there must be at least two people coming and going between 10 and 10: 20.
I met on the road, or let's just say that the two people who came first must have met!
So why did "three people all claim that they didn't know that the other two had been here"? Based on the above results, we can at least draw the following conclusions.
They all have reason to hide the truth from each other.
Look at w, z, y, z, y first. From Z stepping on the body, we can know that the murderer is W, and W can understand that he didn't see Z, simply because.
Have a guilty conscience, but it is unreasonable for Z to say that he has never seen W. Imagine an innocent person suspected of murder.
Before I saw myself, someone had left the dead man's room without providing this powerful proof of his innocence. How can it be?
what's up
Let's look at Y, W, Z W, Z again. Similarly, if the safe is to be opened, then Y can't be the murderer, then W is the murderer, so what does Y have?
Why did you say you haven't seen W? Not at all, what's more, "Ye told everyone she knew in the company recently.
I feel angry. "
The answer is obvious, there is only one possibility, that is, the arrangement of W, Y, Z, Y and Z!
However, this problem has not been well solved. If in the order of w, y, z, y, z, who killed it? Suppose w, then y arrives.
After seeing the body, he couldn't help telling the fact that he saw W for the same reason as above, so only Y killed people.
Wait, you have a problem here. Xiao Liu interrupted Afei: If Y killed him, what reason did W have to hide?
Have you seen you?
Don't worry, didn't I say that the puzzle has not been completely solved? The prompt this time is "I found another piece on me that was hit by a fish tank."
The only reasonable explanation is that W mistakenly thinks he killed the dead! The fish tank was broken and the victim was stabbed at the same time.
Happen.
You also need to say that the order of y, w, z, w and z may be explained in this way. But, I want to say, impossible. The dead are like tigers, and
A woman who fights must not be knocked out under any circumstances.
Let me repeat the whole incident, I believe it will not be much different from the final investigation result: 10 o'clock or so.
One first came to the apartment of the deceased, and the deceased took out the household registration book and questioned Wu's misdeeds. Wu was angry for a moment and fought with the deceased.
In the process, the deceased bumped into a fish tank, which was broken and dizzy. Wu thought he had killed someone, so he ran away in a hurry and met Ye on the way. Yemou
After entering the house, the deceased just woke up from a coma. Ye Moudun was killed and picked up the paper cutter on the table. Wound question
This topic has been described before. I didn't see the last Zhang on the way to escape in a hurry, so I can draw a small conclusion: Zhang Hui.
For masked people who go out after 10: 20. It is said that Zhang was startled when he came home and saw the body and the blood on the ground.
However, walking to get the book will inevitably leave blood footprints, which will be exposed when the police check, and he will be in a hurry.
Supported by his main foot-his right foot, he jumped on the body of the dead lying flat, which is why there are more footprints left.
The reason is deeper, because at this time, the left foot first touched the body of the deceased. Take the ledger and leave immediately, leaving a vacancy.
Abnormal blood.