Cho Dongmin's teacher's name is Lee Dong-woo, and Kim Yoon-ho has seen this person before.

After being summoned, he arrived at the District Attorney's Office at 3 p.m.

Li Dongyu's hair is messy, his eyes are a little sluggish, and there are deep eyebands under the corners of his eyes, which is obviously the sequelae of being woken up in the middle of the night.

Kim Yoon-ho and they judged correctly, Cho Dong-min trusted Lee Dong-woo very much.

After being appeased by Li Dongyu, Zhao Dongmin quickly climbed out from under the table, hid in Li Dongyu's arms, and said the first sentence: "Teacher ......"

Seeing Zhao Dongmin speak, everyone breathed a sigh of relief at the same time.

But things didn't go well, and Zhao Dongmin never said anything other than the word 'teacher'.

When I asked him anything, he shook his head.

In fact, Zhao Dongmin suffers from a severe intellectual disability, although he is 15 years old this year, his intelligence level is only 4 to 5 years old.

I think he should have been frightened and forgot about what happened for a while. ”

Teacher Li Dongyu explained, which is very in line with Zhao Dongmin's current situation.

After hearing this, Yin Guohong and Song Enzhi nodded in agreement.

But Kim Yun-ho thought of more.

He had encountered this situation before, and he had learned how to deal with the present situation in books, so he did not hesitate to speak:

"Everyone prepare, let's take Zhao Dongmin back to his house together, maybe in a familiar environment, at the scene of the murder, we can awaken his memory at that time.

Teacher Li Dongyu, please come along, only you are the most suitable to contact and appease Zhao Dongmin. ”

Li Dongyu nodded. There are no comments. A very responsible teacher.

Kim Yoon-ho looked after thanking him. Turning his head to Yin Guohong, he instructed: "Bring the surveillance video of the building that we retrieved, and we will go to Zhao Shangxi's house for analysis, and we will work there." ”

――

At four o'clock in the morning, Kim Yunhao and his party came to Zhao Shangxi's house.

The survey has been completed, so there is no problem for everyone to enter.

Lee Dong-woo took Cho Dong-min back to Cho Dong-min's room to rest alone; Yin Guohong took out his notebook and checked the surveillance video in the lobby on the first floor of the apartment at the time of the crime.

Song Eun-ji and Lee Hye-na also came, but there was no work for them for the time being, so they just took a nap on the sofa.

Kim Yoon-ho, on the other hand, was wandering around the house. A second look at the scene of the murder.

Through repeated observations, Kim Yoon-ho confirmed several points.

In the bathroom, it was not difficult for the murderer to kill Zhao Shangxi.

It is not difficult to soak Cho Sang-hee's body in water and pour bleach into it, and clean up the evidence left at the scene. With enough time and care, it can theoretically be done.

But without unlocking the door, the murderer left the bathroom, which was the most difficult.

Kim Yun-ho tried many ways, but none of them worked.

After seeing that he had no way to do it like a murderer. After freely entering and exiting the locked bathroom, Kim Yoon-ho showed an extremely happy smile.

He believes. If you can't do it yourself, then the murderer ...... Can't do it either.

In other words, the murderer left the scene before Cho Sang-hee's death.

As for how the bathroom door was locked, Kim Yun-ho hasn't figured it out yet.

Then, Kim Yoon-ho began to check the bedroom again.

Again, he still couldn't find a way to leave the room with the door locked.

In other words, the murderer also left the room before Zhang Suying's death.

But how these two doors were locked, Kim Yun-ho has never figured out.

With a mind full of questions, he returned to the living room, stood on the balcony and meditated with his eyes closed, without saying a word.

What kind of means did the murderer use to create the effect of the secret room?

Why did the murder weapon mysteriously disappear?

Why did Zhao Shangxi and Zhang Suying have peaceful expressions before they died?

Thinking about the clues of the secret room murder case, Kim Yun-ho's mind was a mess.

………

In the early morning, the rising sun is orange and soft, spilling into the living room, which looks exceptionally clear and clean.

Kim Yoon-ho stood on the balcony watching the sunrise for a while.

Under the sun, the pure black and straight suit made Kim Yunhao more and more slender, handsome and fair-skinned.

There was no expression on his face, let alone a smile.

"Comrades, get up and work!"

A strong male voice suddenly sounded in the quiet living room, instantly waking everyone up. attracted the attention of Yin Guohong, Li Huina, and Song Eunzhi.

Kim Yunho stood in the weak sunlight, his eyes slowly swept over everyone, and his slender and clear eyes finally showed a hint of arrogance.

"Wake up Zhao Dongmin and Teacher Li Dongyu, I want to... Replay of the case. ”

When watching the sunrise, seeing that the rising sun is so clear and clean, pointing directly to people's hearts, Kim Yunhao suddenly understood.

Locked room murders are extremely difficult, but these are superficial phenomena. It's all the murderer wants to show him.

He found that he was unconsciously brought into a kind of preconceived thinking by the murderer, and he has been following the investigation of the murder case in the closed room.

Now, he wants to put aside these complicated thoughts, return to the essence, and go straight to the core of this case, Zhao Dongmin.

Cho Dong-min was an eyewitness to two homicides and a key figure in Kim Yoon-ho's previous investigation into domestic violence.

The origin of all this is actually in this Zhao Dongmin, who has a severe intellectual disability.

――

Half an hour later, Lee Dong-woo took Cho Dong-min to the living room and sat on the floor in front of the coffee table in the living room according to Kim Yun-ho's instructions.

Seeing that the two of them were seated, Li Huina closed the curtains on the balcony and turned on the lights in the room to create a night effect.

Then the bathroom door suddenly opened, revealing two people inside.

Kim Yoon-ho is holding a toothbrush in his hand and is stabbing Yoon Kook-hong, who is facing away from the living room. After Kim Yoon-ho stabbed a few times fiercely, Yoon Kook-hong then fell to the ground...

Kim Yoon-ho turned his head to look at the living room, and Song Eun-ji, who was in charge of observing Cho Dongmin's reaction, shook his head regretfully.

They were doing live re-enactments in order to stimulate Zhao Dongmin and arouse his memories at that time.

Unfortunately, it didn't work out!

Is there a wrong direction?

Kim Yun-ho decisively shook his head and vetoed, he believed his previous judgment. Return to the origin and find clues from Zhao Dongmin. You can't go wrong in this direction.

Now he and Yoon Guohong play the murderer and Cho Sang-hee respectively. Imitating the situation at the time did not resonate with Zhao Dongmin.

That is, they are imitating the wrong one.

So what if you add another person?

At the time of the crime, there were Zhao Shangxi, Zhang Suying, Zhao Dongmin, and the murderer in the family.

Thinking of this, Kim Yun-ho decisively called over Lee Hye-na and asked her to play his wife Jang So-young.

This time, the three of them appeared in the bathroom together, and the murderer played by Kim Yoon-ho held a toothbrush and played the role of her husband, Yoon Kook-hong. And Li Huina, who plays his wife, is constantly obstructing on the side.

Seeing this, Zhao Dongmin began to react, his eyes kept staring at the three people in the bathroom, but there was no other overreaction.

Seeing this, a smile appeared on the corner of Kim Yunho's mouth.

Zhao Dongmin's reaction told him: the number is right.

There were three people who appeared in the bathroom at the time of the crime: the murderer, Zhao Shangxi, and Zhang Suying.

However, Zhao Dongmin did not overreact after that, which shows that the situation they simulated was wrong.

After trying several other situations, Zhao Dongmin finally had a reaction.

First the husband beats his wife, then the wife resists. In the end, the killer joined to help the wife, and finally the wife stabbed her husband with a toothbrush.

When seeing this performance plot. Zhao Dongmin's eyes bulged, he screamed, and after glancing at Song Eunzhi and Lee Dongyu in horror, he immediately got under the coffee table.

It's done!

The simulated on-site environment of Kim Yunho and the three of them successfully resonated with Zhao Dongmin.

By repeatedly comparing Cho Dongmin's reactions, Kim Yunhao successfully restored the situation at the scene of the crime at that time.

It was none other than his wife Zhang Suying who stabbed Zhao Shangxi to death with a toothbrush.

"Jin Jixi, how did you come up with this attention? And also came up with such a complicated and correct plot of the crime? Lee Hye-na looked at Kim Yoon-ho in shock with a look of adoration.

Kim Yunho quickly explained: "Zhao Dongmin is the only survivor in this case, he was not killed by the murderer, the biggest possibility is that he hid under the coffee table at that time and was not found."

And from under the coffee table, he just happened to be able to see the whole process of the two murders.

His reaction confirms this.

As for this plot deduction, it is actually not too complicated.

Judging from Cho Dongmin's reaction, three people appeared in the bathroom, and finally Cho Sang-hee died.

Demonstrate all the possible scenarios and you'll find the right answer. ”

This is easy to understand, but Li Huina can't figure out other places: "Jin Cixi, then how did you come up with and join the plot of a husband beating his wife?" ”

Kim Yunho smiled confidently, "It's very simple, we first came into contact with Cho Sang-hee because of a domestic violence case. It is only when domestic violence occurs that Zhao Dongmin is afraid and hides, and finally survives.

That's why I added the plot where the husband beats his wife. ”

After the unremitting efforts of everyone, the facts of Zhao Shangxi's death case finally surfaced:

At the time of the crime, Zhao Shangxi was beating Zhang Suying, and then the murderer appeared to help control Zhao Shangxi, and finally his wife stabbed Zhao Shangxi to death with a toothbrush.

The facts of the case have appeared, but there is still one biggest suspicion that has not been clarified, Yin Guohong asked: "But what kind of means did the murderer use to form the secret room?" ”

Kim Yunho smiled indifferently, "Hmph, the murderer doesn't need to do anything, just say a few words, and he can make Zhao Shangxi take the initiative to close the door." ”

"Huh?" Yin Guohong was surprised: "How is this possible? ”

Kim Yun-ho snorted, "What's impossible?" The murderer only needs to say to Zhao Shangxi:

This is Zhang Suying's excesses in a hurry. But she will face legal sanctions afterwards.

If you love your wife, you should cover for her and take the initiative to help Zhang Suying cover up the evidence of the murder.

All it takes is these few words.

Out of deep love for his wife, Zhao Shangxi suffered a carotid artery hemorrhage, and he didn't want his wife Zhang Suying to accept legal punishment when he knew that he was about to die.

So he voluntarily locked the door, lay down in the bathtub and filled it with water, and then poured bleach liquid to wash the evidence on his body. In the end, the secret room was naturally formed. ”

"However, how do you deduce that Zhao Shangxi loves his wife Zhang Suying very much?" This is the most critical point in Kim Yun-ho's reasoning, and Yoon Guohong can't figure it out.

Kim Yoon-ho smiled simply, because he had met Mr. and Mrs. Cho Sang-hee when they bought a mobile phone last week. Through the observation of micro-expressions, he saw at that time that Zhao Shangxi loved his wife Zhang Suying very much.

It's just that this involves his hole card - micro-expression, so he didn't say it to Yin Guohongming.

He turned to say: "Come on, appease Zhao Dongmin first, and we need him to help us simulate the situation when Zhang Suying dies." (To be continued......)

ps: The third watch was delivered, a little later than usual, sorry! From here, I started to enter the key points of the case, and then I wrote myself confusedly, and wrote it three times, around and around, and around myself. Fortunately, I finally crawled out of the pit