"Ah, I've learned this sentence well!"

In the ears covered by the short brown hair, in the hidden headphones, there was a voice of gray plain laughing, and said solemnly:

"But are you sure you already know who's the killer? Don't waste any more time here, know that no matter what the facts are, if you don't get out soon, it's going to be dangerous! ”

However, Gao Yuan did not give Gray Yuan a reply.

After hearing what Gao Yuan said, Officer Ayakoji Wenlu asked with some curiosity:

"Oh? Do you know what's going on in this case? ”

In this regard, Gao Yuan nodded and explained:

"The trick of this incident is the secret room and the cause of death......

"That's right, according to your statement at the scene, the situation of the secret room that could not be opened before the toilet door was broken, and the door could not be opened even if the key was used, which is also the most critical point of this incident."

Before Gao Yuan finished speaking, Ayakoji Wenlu interjected after hearing the word "secret room":

"But if I have to say it, there are only three people who can prove that the crime scene is a secret room. Now that the door has been broken again, there's no way to know what the condition was like—"

As he spoke, Ayakoji Fumiro confidently glanced at Takato and the three of them and the flight attendant on the side.

"In the simplest way, if you were colluding and complicit, then the problem of the secret room would have been solved a long time ago! As long as you pretend that the door lock is stuck, you can't open it, and then you break the door lock with a hammer afterwards, you won't find anything. ”

Saying that, after a pause, Ayakoji looked at the flight attendant-

"One of the most favorable facts in support of this argument is why the flight attendant, after discovering that the door lock was jammed, did not go to someone for help, but took the initiative to find a hammer and smash the door lock — which is considered destruction of public property, and an employee of his level should not have the authority to make such a judgment."

"What, officer? Isn't it indefatigable for you to say that! ”

When Takaki heard that the police classified her as an accomplice, she couldn't help but speak for the flight attendant.

"Well, can I defend myself?"

At this time, the flight attendant said in a weak tone, but Ayakoji Fumiro did not stop him and motioned for him to continue, so the flight attendant explained the reason:

"Because there was an explosion on the Shinkansen before, and the key person who carried the bomb also locked himself in the toilet and couldn't get out, which almost caused a tragedy, so we are particularly sensitive to this kind of thing now, and it is best to confirm the situation as soon as possible once we find this suspicious situation."

"Oh, I have the impression that it was said that it was also an explosion on this stretch of line......"

Hearing the conductor say this, Fumiro Ayakoji recalled the previous bombing, and the location of the explosion seemed to be on the line to Kyoto after the Shinkansen train passed through Nagoya Station. In this regard, Ayakoji Fumiro can understand the reason why the flight attendant would do this.

"Mr. Officer, your reasoning is interesting."

Faced with such a situation, Takato said in a cold and arrogant voice of Miyano Shiho: "But I'm not their companion, and it's even the first time I've seen them. Moreover, as I said, the key to the case is not only the secret room, but also the cause of death. ”

"Oh? Tell me about it? The medical examiner can't tell which the cause of death of the deceased is, so how can you be sure - Miss? ”

Ayakoji asked.

As if with a faint laugh, Gao Yuan continued:

"Maybe the forensic doctor is rigorous, so he doesn't dare to jump to conclusions. However, the phenomenon of pulmonary edema in the corpse alone can probably be understood, and this must not have been caused by a knife wound. ”

As he spoke, Gao Yuan looked at the three people who were walking with the deceased, and said solemnly:

"This is probably caused by acute poisoning with illicit drugs such as diacetylmorphine."

"You mean, illegal drugs?"

Hearing this word, Ayakoji Wenlu was thoughtful, and also looked at the three people, only to see that the expressions of the three people also changed a little after hearing this word.

"That's right. Mr. Officer, you should know one of the methods used by outlaws who do this kind of thing to transport such illegal drugs - put them in a sealed sleeve, swallow them, eat nothing on the way, and then expel them when they reach their destination, and one person can transport dozens of these items at a time. ”

"Yes. This is indeed one of the more common means. ”

"And there is a certain danger, once the sleeve breaks, that person will directly absorb a large amount of illegal drugs and cause acute ...... Poisoning? ”

As he spoke, Ayakoji understood what was going on.

"Yes, that's it."

Gao Yuan said, "When his accomplices found out that he was no longer dead, they wanted to disembowel and take out those things in a hurry to prevent suspicion from the police." However, this was too obvious, so after calming down, he made up a knife in the back to cover up the cause of the deceased's death and their true purpose! ”

"Ah, that's the case, no wonder you want to take a picture of the condition of the deceased and ask me what I think."

In the headphones, Gray Yuan's voice sounded again.

That's right, this conclusion can be drawn because Gao Yuan found an opportunity to use a hidden camera to photograph the condition of the deceased before the police arrived, and sent it to Gray Yuan, so that she could give a possible guess about the cause of the deceased's death, and then Gao Yuan analyzed the most likely situation in combination with the actual situation - you can't waste time, you must race against time!

"So, what's going on with the Chamber of Secrets?"

Ayakoji asked thoughtfully.

"Ah, isn't what Mr. Police Officer just analyzed quite reasonable?"

Gao Yuan said arrogantly and with some sarcasm, "Since there are accomplices, then the secret room is actually very easy to understand, but it is different from what you think about the police officer - after all, I am not an accomplice." ”

"Don't be like this at this time! Hurry up and go! ”

Listening to Gao Yuan's imitation of his own speech and imitation more and more similar, Gray Yuan couldn't help but say with some shame.

"The scene is actually a pseudo-secret room."

Gao Yuan began to explain straightforwardly:

"The door lock won't open, it's not that it's stuck, it's that someone in the toilet is pulling the lock cylinder hard - that is, there was someone in the toilet at that time. But the deceased was already dead at that time, so the murderer was in the toilet at that time. After that, while the flight attendant was looking for tools, I went to the toilet and the murderer escaped from inside, it was as simple as that. ”

"The whole process required the cooperation of three people, and the flight attendant and I were just witnesses who happened to be looking for to prove that the scene was a secret room."

After a pause, Gao Yuan looked at the three people who knew the deceased, and continued to explain:

"One person is pulling the lock cylinder in the toilet, another person is occupying the toilet on the other side, and another person is outside pretending not to unlock the door. In this way, the person who comes to the toilet after that must contact the person outside the door because the toilet on both sides cannot enter to prove that the scene is a secret room, and then you can find the flight attendant to come over, and at the same time, the task of the person occupying the toilet on the other side is completed. ”

As he spoke, Takato looked at Sayuri Anzai.

"I remember that shortly after Taki Aya went to find the flight attendant, it was this classmate who came out of the toilet on the other side. I was supposed to go to the toilet, and since the toilet was empty, I naturally had to go to the toilet. And after that, the flight attendant came and confirmed that the door lock could not be opened to find tools, so the murderer hiding in the scene could take advantage of the fact that there was only one accomplice outside and run out! ”

With serious eyes, he looked at these three cardamom college students and said-

"That's right, it's the three of you - three prisoners transporting illegal drugs, and three murderers at the same time!"