Wu Gan cited all the 'evidence', that is, all the tools that Li Xue used to commit the crime, but he made it clear that all these 'evidence' were useless or simply could not be found.

There is no way, the reality is like this, Li Xue is much more familiar with the time for cleaning up the garbage in the school than Wu Gan, and the time of the crime was set by her early, and most of the tools used to commit the crime are finished.

In this way, this is really a perfect method of murder, and it can be regarded as a suicide murder.

Li Xue smiled, and there was a strange ghost against the backdrop of the street lamps on the bridge and her red hair.

Maybe it's because I'm being praised by the detective in front of me.

This detective is indeed very powerful, he was in the limelight in court before, and now, he can see through this murder method.

Being praised by such a character, it is normal for Li Xue to be a little complacent, but she is still under siege.

At this moment, the flaws were finally spoken.

"What flaw?" Li Xue was very curious.

Wu Qian said simply: "I said before, if it were me, I would be able to be more perfect."

The flaw is Zhang Mengdi's left arm.

You also saw the appearance of Zhang Mengdi's body, there was a puncture fracture in her left arm, this fracture is actually very common in falling to death, but, in this case, the fall from the roof of the building on the 8th floor was cracked by me, but in fact, you want everyone to think that Zhang Mengdi fell from the 7th floor, then, such fractures are relatively rare.

Why is this happening to her left arm?

It was at the moment she fell from the building that she made a surviving move and grabbed the railing with her left hand.

However, she is a weak woman, and her posture is completely wrong, and she has just woken up, and she will only produce one result by doing so.

The left hand grabbed the railing, but the body still rolled down, the weight of the body made her arm stuck on the edge of the roof wall, directly fractured, so that she couldn't hold the railing, the whole person fell down, and when landing, because of the fracture of the arm, no matter what posture she landed, the arm will be injured twice, and the bones that have been broken inside will most likely puncture the skin, forming the puncture fracture we see.

That's why there's a red mark on the edge of the roof. ”

Li Xue stared at Wu Gan deadly, "Wu Gan, then why can you let this flaw disappear?"

"Quite simply, I'm a man. Wu Qian said such a reason.

"......" Li Xue showed an expression, 'You straight man cancer'.

But Wu Gan explained carefully: "Most of us have a right-handed hand, and I also asked the glasses female classmate before, and now I am sure that Zhang Mengdi is also right-handed, and the same is true for you Li Xue, this is my observation, of course, I am too." It is normal for us to use our right hand, so the strength of our right hand is naturally greater, especially for stability.

Then, when carrying Zhang Mengdi's body to that position, we naturally use our right hand to work, and the upper body of the person is heavier than the lower body, especially a head is very heavy, and the position of carrying Li Xue is the edge of the roof, and the slightest negligence will fall down.

You know, when you carry her, there is a time limit, the effect time of ether is only about 20 minutes, you can use ether on Zhang Mengdi many times, but a few roommates in 703 are not, you are afraid that they will find out that they are out, the most important thing is that if they are woken up by your footsteps and the sound of closing the door, of course, you don't need to lock the door, in order to make the illusion that Zhang Mengdi went out, but if they find that Zhang Mengdi's bed is empty, it will be all over, so it must be completed in a short time。

You will definitely use your right hand mainly, and in this way, Zhang Mengdi will form such a posture.

Even with the help of the clothesline on the rooftop, it is impossible for you to adjust Zhang Mengdi's body to another position that you are uncomfortable with.

So, she was placed there, but her right hand must be facing outward, and her left arm would be close to the railing.

But if I do it, my strength is enough to support me to place Zhang Mengdi's body with unaccustomed hands, so that her left arm is facing outwards and her right arm is close to the railing, so that when her mobile phone alarm clock rings, when she is used to groping with her right hand, naturally, when she rolls down to the roof, she can't grab the railing with her right hand, and her left hand is outside, so she can't grasp the railing. ”

So that's it!

But.

Li Xue asked, "But is that flaw important?"

Wu Qian thought for a moment before he said, "From the perspective of the whole case, this flaw is very important. ”

"What do you mean?" Li Xue was puzzled.

"Think about it. Wu Qian scratched his head, "The key problem with this flaw is that because of Li Xue's survival action in her left arm, she fell to the ground, and her left arm formed a puncture fracture, and it is difficult to fall like this on the seventh floor."

Then, it will make people suspect this suicide, and then do an in-depth investigation, if it wasn't for the fall of 703, where would it be?

In this way, you will look up, and when you reach the rooftop, you will see a red mark on the edge of the wall.

You know what? This completely eliminates the possibility of suicide?"

"Why?" Li Xue asked with a frown.

"It's simple, because the rooftop is locked, it's locked from the inside. Wu Gan explained slightly, "As long as there is an interrogation, there can only be one result, and no one will admit that he has locked this lock." Because it's very simple, there is only one possibility, that is, the murderer locked this lock, and the murderer himself will not admit it, and other classmates and teachers have not done it at all, and of course they will not admit it.

Then, we can understand that this is a murder, and definitely not a suicide, and the murderer is in dormitory 16. ”

Li Xue suddenly realized: "So that's the case, then, how useful is this flaw?"

Wu Qian shook his head, "It's useless, from the perspective of suicide, it is also possible for Zhang Mengdi to have a puncture fracture of his left arm, although the probability is lower." The point is, there are no clues or evidence to find the murderer. Even the red mark, now that I already know, the Forensics Department has no way to extract DNA, and it can't be confirmed that it is Zhang Mengdi's, so it can't be proved that Zhang Mengdi rolled off the rooftop. ”

"Hahaha......" Li Xue laughed, "It turns out that you only stared at me because I was an important suspect, and you felt that this case was not a suicide, and you decided that Zhang Mengdi was not the instigator, the real murderer, right?"

"Yes, that's it. Wu Qian nodded, "This is indeed a bit shameless, well, I have made a presumption of guilt against you." ”

"You bastard!"

"I used methods that I didn't even want to use, I was unfair to you, I used psychological warfare.

Ether, injections, keys, old cell phones...... These are the tools I can think of, the tools that you schoolgirl could have done such a murder and might have obtained.

Anyone who does evil will feel guilty in their hearts, so I can only use my own reasoning, with all I can think of, to create this perfect murder method, and present the clues and possible evidence in front of you one by one.

This will send you a message that I have completely seen through your modus operandi.

Let your heart hold up.

After all, you are just a female college student, even if you know in your heart that all the tools used in the crime have been thrown away, you will still not be able to hold on.

There is another key, that is, you faked the suicide scene, you want everyone to think that Zhang Mengdi jumped from the window of the 703 dormitory, I must say that your idea is very good, and the completion is also great.

However, when I debunked the fake scene at once, I asked Qin Yan to ask about the lock, and there were many technicians who appeared, they were wrapped in bags and small bags with various instruments, just this posture, and didn't tell you the result, your heart should be very panicked.

You're going to be very scared, or the more you think about it, the more scared you are.

When I contact Lin Bing, she may have some changes, and you will collapse.

According to my reasoning, your laptop must be left on all the time, which is a less reasonable situation.

Of course, this cannot be used as evidence, and no one can do anything to arrest a person who has been on a laptop as a murderer.

That glasses classmate was my mouthpiece, and I deliberately asked her to pass on these messages to you, and I just told her that this way I could solve the case.

The above is my way to solve the case, I only have this way, only let you expose yourself. ”

"Wait a minute!"

Li Xue interrupted suddenly, then stared at Wu Gan, and said with a very strange expression on her face: "Wu Gan, what you said seems to be perfect in Luo Ji, but I suddenly thought of a key question, what you said before is to determine that I am the main suspect, and then I can solve this case, but I think the reasons you said before are difficult to establish, just because I am your main suspect?"

Wu Gan shook his head with a smile after hearing this, "You are really powerful, I originally wanted to hide it, it was a temptation for you, and you found out, okay, I made it clear, the reason why I finally circled you was because of one person." ”

"Who?"

"Mrs. Xie, to be exact, it was Mrs. Xie who made me determine that you are the most suspicious. ”

Mrs. Xie?!