These two people said everything you said, and everyone was confused, so Fang Xin asked

"Mr. Yu, little fang, what's going on? Why did you suddenly say that Han Chen didn't commit suicide? ”

Song Xiaofang and Yu Dongting glanced at each other, and Yu Dongting began to explain

"Han Chen is left-handed, but when we found his body yesterday, the gun was held in his right hand, so it must be that after the murderer killed him, he pretended to be a suicide, but he forgot that he was left-handed."

Song Xiaofang also touched his chin and said quietly

"I see, no wonder I feel that there is something incongruous, it seems that Han Chen was really framed, and the real murderer is among us!"

Hearing Song Xiaofang's inference, everyone broke out in a cold sweat and looked at each other in disbelief.

"However, Mr. Yu, Song Xiaofang, none of us have any chance to kill Han Chen, from here to the laboratory, it takes at least two hours to go back and forth, for us, it is impossible to commit a crime."

"Yes, and in Guan Shuang's case, how did the murderer leave that secret room?"

Lao Zhang and Fang Kexin's successive questions, Song Xiaofang really had no way to answer, but even he didn't know where he got the confidence, and said in a loud voice

"Don't worry! I can definitely investigate these two cases clearly, just like figuring out the truth about the murder of Guo Xiang and Zuo Hongyi! ”

Now Song Xiaofang seemed to be standing in the spotlight again, and everyone looked at him with different eyes.

Su Yong was still a little disdainful, "Cut, I thought you were the protagonist in the novel?" It just so happened that Meng felt amazing about two cases? ”

Seeing this, Yu Dongting thought silently with a slight apology in his heart

"Song Xiaofang, I'm sorry, although I already know the method of the Guan Shuang case of the secret room murder case, but I can't tell you now, when the time comes, I will give you a hint."

If Song Xiaofang noticed Su Yalan's eyes looking at her now, she would definitely be very happy, because her eyes were full of admiration, and women could easily fall in love with serious men.

However, Song Xiaofang now puts solving the case in the first place and asks Yu Dongting

"Mr. Yu, which of the two cases do you want to be responsible for?"

Yu Dongting didn't understand what Song Xiaofang meant, was slightly stunned, and asked

"Little Fang... What do you mean? ”

"In order to solve the case quickly, let's go our separate ways, which case do you want to solve?"

Yu Dongting smiled and thought to himself

"I have already seen the secret room method in Guo Xiang's case, so naturally I won't choose it." He pretended to make a distressed expression and said embarrassedly

"I've been thinking about the method of killing people in the secret room for a long time, but I haven't thought of it, I guess it's up to you, I'll try to break the impossible crime of Hanchen."

"Good!" Song Xiaofang agreed, pulled Su Yalan to the second floor, and took her to room 47 where she lived at the beginning.

On the other hand, Yu Dongting also began to go out to investigate and see if there were any unknown shortcuts.

After being dragged by Song Xiaofang to room 47, Su Yalan asked puzzledly

"Little Fang, if you want to investigate the case, shouldn't you go to room 50 next door? What are you doing here, and I can't help much, why did you ask me to come? ”

Song Xiaofang put his face close to Su Yalan and began to explain

"I've been to that room many times, there are no clues at all, I dragged you up, I want you to have a good memory, that night, you lived in this room, next door to the scene of the murder, did you hear any strange sounds, or any strange things?"

Su Yalan thought about it carefully, and finally remembered something, and hurriedly said

"Yes, yes! I heard it that night. ”

"Quick, tell me, what, what did you hear?" Song Xiaofang asked excitedly

Su Yalan nodded excitedly and said excitedly

"I didn't sleep very comfortably that night, and I hadn't fully slept in the early hours of the morning, and I heard some sounds."

When Song Xiaofang heard this, he was very happy

"Early in the morning? Isn't that the time of the crime? Tell me, what kind of sound is it? ”

Su Yalan nodded heavily, imitating the voice she heard very seriously

"I heard the sound of Qi~ then whirring ~ and then banging ~ and finally ding~."

After Song Xiaofang heard this, her smile froze, and her whole face was black, looking at Su Yalan with an idiot look, and she imitated her tone

"Qi ~ then whirring ~ then bla la la ~ finally ding ~"

"Yes, yes, yes! That's the voice. Su Yalan didn't expect Song Xiaofang to learn so similarly, she applauded very emotionally, and took the initiative to ask

"How's it going, little fang? Did it help? ”

"Yes, yes, it helps a lot." Song Xiaofang said yes, but he thought about it in his heart

"Are you here to play with me?"

However, Su Yalan felt as if she had made a great contribution, and asked happily

"Did you think of anything? Do you know who the murderer is? ”

Song Xiaofang smiled bitterly and said blindly

"I'm a little inspired, but I still have to think about it."

But the subtext in my heart is

"That's you, another person, you see if I beat him, and dare to ask me if I think of anything."

Song Xiaofang thought about it for a moment and asked again

"Yalan, since you've heard these strange noises, why don't you tell us?"

Su Yalan scratched her head embarrassedly and said

"I was so scared at the time, you didn't ask me, I thought it had nothing to do with the case, so I just..."

Song Xiaofang also recalled that he was afraid that Su Yalan would leave a psychological shadow, so he didn't tell her much about the case, and then he realized a new problem

"I didn't ask because I was worried that Yalan was afraid, what about Yu Dongting? Why didn't he ask? Is it the same as me? Or is there something else going on? ”

But that didn't matter too much, Song Xiaofang raised his head and continued to ask

"Yalan, is that loud voice? How long did it last? ”

Su Yalan rolled her eyes, and she could see that she was trying hard to recall

"It's not very quiet, because I remember it was very windy outside, but I could still hear it, how long did it last... It's not particularly short anyway, and if it weren't for the fact that I'm too scared, I'd have wanted to go out and have a look. ”

Hearing this, Song Xiaofang muttered softly

"This is strange, my room is far away, maybe I didn't hear it, but Han Chen and Lawyer Liang's rooms are very close, why didn't they mention it?"

Su Yalan felt that her usefulness was getting bigger and bigger, and she also began to help Song Xiaofang reason

"Could it be because they slept so soundly that they didn't hear it?"

"Too familiar? yes, I see! I know! ”

Su Yalan stood up and asked ecstatically

"Little Fang, do you know how the murderer left the secret room?"

"No, I don't know that." Song Xiaofang's eyes became unusually bright and continued

"But I know who the murderer is, and I also know why the murderer had to kill you."

"Huh? Kill me? Su Yalan's heart tightened and asked nervously.

"No,,, nothing."

Although Song Xiaofang has determined who the murderer is, he still does not know his modus operandi, let alone conclusive evidence, Song Xiaofang is once again in a predicament.

At this time, Song Xiaofang suddenly remembered the notebook that Xiao Yanran left for herself when she was dying, maybe there would be a method about the murderer's crime.

Song Xiaofang and Su Yalan returned to room 28 and found the notebook that they put away yesterday, because everyone thought that the murderer was Han Chen yesterday, so Song Xiaofang felt that this notebook was useless, and did not read it out of respect for the deceased.

The notebook had become tattered, and only a few things could barely be discerned:

"He left after seven years with me, but thanks to him, my experiments have made great progress."

"It's been two years, this little girl is very good, and she shouldn't waste her time on this."

"Hey, why, there was finally a like-minded person with me, but he left for this reason."

"He called me crazy."

"She even told people that I would suck human blood."

……

"I succeeded, I finally succeeded."

"This brute, he and my wife have the same surname, I have always regarded him as a son, but I didn't expect that he would watch me fall ill and not give me medicine, you can't get my gold! Won't let you get! ”

After reading it, the two of them were in a very heavy mood, Su Yalan leaned on Song Xiaofang's shoulder, and silently shed tears

"I didn't expect my dad to go through so much, if I had been by his side at the time, he probably wouldn't have been..."

Song Xiaofang took advantage of the situation and hugged Su Yalan and comforted

"Fool, don't blame yourself, the world of genius is destined to be lonely, and it's useless to think too much now."

Thanks to this notebook, Song Xiaofang thoroughly knew the murderer's motive for killing, and the next step was to find out the methods used by the murderer and the evidence that he could not deny.

At this time, there was a knock on Yu Dongting's door

"Little Fang, open the door, I have made a big discovery."

Yu Dongting took Song Xiaofang and Su Yalan to the upstream river, about 200 meters away from the hut, and pointed to the trees by the river

"I noticed that the roots of the tree had been worn by the rope, and there were some straws buried nearby, which felt unnatural, but I didn't understand what was going on."

Song Xiaofang squatted down, carefully observed these unnatural situations, and looked up at the opposite side of the riverbank

"Hehehe, I see..."Song Xiaofang smiled as he stood up and said with a confident smile, "It's really a bold technique, but it's been cracked by me!" ”

Yu Dongting was also very happy when he saw him like this, and said half-jokingly

"No, I've been thinking about it here for 10 minutes, and I haven't thought of a reason, and you only understood it in 30 seconds? Hey, don't tell me that the murderer built a rope and climbed over it, and it will be too late. ”

"Of course not." Song Xiaofang's smile deepened

"Don't worry, tomorrow, I'll do this amazing magic again."

Hearing the word magic, Su Yalan was a little inexplicable

"Little Fang, what does this have to do with magic?"

Song Xiaofang habitually nodded Su Yalan's forehead

"Stupid, I'm just describing it."

Yu Dongting asked with a smile when he saw Song Xiaofang looking so confident and relaxed

"Then you already know who the murderer is?"

Song Xiaofang nodded

"I don't know the method of the secret room yet, but I have a way to make the murderer reveal his fox tail."

"What are you going to do?" Yu Dongting and Su Yalan had already asked at the same time

"Then it's up to you to help."

After listening to Song Xiaofang's plan, Yu Dongting felt that it was indeed feasible, and if it went well, his wishful thinking could be easily completed, it seemed that it was time to give Song Xiaofang some hints and let him solve the case in the secret room, so that it would be more convenient for him to implement the plan.

"Ahem." Yu Dongting pretended to clear his throat and said

"Little Fang, you are really amazing, although your observation skills are not as good as mine, but your reasoning skills are really strong, you can not be confused by the surface of things, and see deeper things, as a chemist, I am really ashamed."

Song Xiaofang was a little embarrassed to be praised, and hurriedly said

"Where, Mr. Yu's carefulness makes me admire, not to mention, how can it be said that it seems that chemists have to see things more deeply?"

Yu Dongting pretended to be embarrassed and said

"Hey, don't you know, there are many substances in chemistry, on the outside, there is no difference at all, but in fact, the inside is fundamentally different, if one is not careful, it is easy to cause disaster."

Hearing Yu Dongting's words, Song Xiaofang's eyes widened, recalling the strange voice Su Yalan had said before, as if it was the last key to open the door of the maze.

"I see! I get it all! I know how the killer created the secret room. ”

(At this point, Song Xiaofang's exploration process is completely over, and Song Xiaofang has received as many clues as readers, and it is obvious that the murderer is among the eight people who are still alive: Song Xiaofang, Yu Dongting, Su Yong, Lao Zhang, Qiqi, Fang Kexin, Liang Yanyan, and Su Yalan.) So who is the murderer? What is the motivation? And how did you accomplish the murder in the closed room and the impossible crime? ）