Stay away from Conan.

Chapter 276
"Misunderstanding what?"

Blinking, Gao Yuan asked in a daze.

Hearing this, Hui Yuanai blushed slightly, turned his head immediately, turned his back to Gao Yuan and said lightly:
"It's nothing, just say it casually."

Therefore, Gao Yuan didn't care, and continued to put his thoughts back on this incident, and began to recall all the experiences at the party, and then asked Hui Yuanai with the purpose of seeking knowledge:
"By the way, Huiyuan, after oral administration of potassium cyanide, is there any statement on the time until the onset of toxicity?"

After all, Gao Yuan only has a general understanding of cyanide. He knows that oral cyanide will lead to a "lightning" death in a few seconds, but there will also be cases of waiting a few minutes before death.

In this incident, no potassium cyanide was detected in the food the deceased ate before his death, so analyzing when the deceased took potassium cyanide is a very important clue.

In this regard, upon hearing Gao Yuan earnestly asking himself for advice, the corners of Hui Yuanai's mouth turned up slightly, stretched out his right hand wearing a "lover", stroked his temple hair, and began to explain with some pride:

"Well... simply look at the intake. When the intake is particularly large, the cyanide in the human mouth can be hydrolyzed and ionized to produce cyanide ions, and enter the cells through the mucous membrane, blocking cellular respiration. The whole process It only takes a few seconds for a person to suddenly faint and have tonic convulsions. But when death comes, breathing and heartbeat stop after two to three minutes."

Very meticulously, Huiyuan Ai first explained the principle of "lightning" death to Gao Yuan, and then began to explain another situation:
"And if the intake is not large, it is impossible for such a dose to damage the vital organs and tissues of the whole person in a short period of time. In this way, most of the cyanide will enter the stomach, react with gastric acid to form hydrogen cyanide, and decompose The cyanide ions are released and then enter the cells. In this way, the death may take several minutes to ten minutes, and the time required for the full state will be longer."

"So that's the case, thank you, Haibara!"

After listening to Hui Yuan Ai's explanation, Gao Yuan couldn't help thanking him from the bottom of his heart, and Hui Yuan Ai couldn't help feeling a little satisfied when he heard Gao Yuan's thanks.

At this point, Gao Yuan had an idea——

In other words, the time when Katsuhiko Minagawa was poisoned by potassium cyanide may still be in the living room, eating cake and drinking coffee with everyone!

Thinking of this, Gao Yuan began to recall what happened in the living room at that time—however, the question is how did the murderer poison it?After all, in the living room, everyone eats the same thing!
The coffee is poured from the same coffee pot, the cups are exactly the same and everyone chooses them at will, and everyone takes the cake at will.

Even if the murderer waited for Katsuhiko Minagawa to finish the selection before poisoning it, the after-the-fact appraisal did not reveal the existence of the poison.

What's more, I was also paying attention to the situation at the scene, and no one had the opportunity to poison other people's cakes or drinks.

Or, was Minagawa Katsuhiko poisoned even earlier?Like the time before he returned to the living room?

Thinking of this, Gao Yuan looked at Conan who was also thinking, and saw that he seemed to have thought of something, ran to Suzuki Sonoko, and asked coquettishly:
"Sister Yuanzi, did you see anything when you went out with Brother Ke Yan?"

Seeing this, Ayumi on the side saw that she couldn't talk to Conan for a while, and then saw the very familiar conversation between Hui Yuan Ai and Gao Yuan just now, so she couldn't help but leaned close to Hui Yuan Ai, and asked quietly curiously:

"Haihara-san, you look so familiar with this detective brother!"

"Yes what's the matter."

Plainly, Hui Yuanai glanced at Gao Yuan, and just replied.

"He's amazing!"

Ayumi praised, "When facing the gang of robbers in the department store, he subdued the gangster with a gun at once! And Conan seems to be very close to him!"

"so what?"

Taking a peek at Gao Yuan, Hui Yuanai asked back.

"Haihara-san, can you tell this big brother to let him solve this case quickly, so that Conan won't chat with big sisters like this!"

Ayumi looked at Conan who was talking to Suzuki Sonoko and said.

Hearing this, Hui Yuanai couldn't help but smiled, but didn't say much. After all, it was up to them whether they could solve the case.

At this time, Conan also asked Suzuki Sonoko, and learned that Minagawa Katsuhiko and Seki Kawa were childhood sweethearts. At that time, Seki Kawa chased him out to send chocolates to Minagawa Katsuhiko, but Minagawa Katsuhiko liked Watanabe Komi, so he did not accept Sekika's chocolate. Therefore, when Sonoko Suzuki came back, he would be disillusioned and eat the chocolate he was going to give.

"Well... There are no traces of being poisoned everywhere. This seems to be a suicide."

Police officer Megure questioned the people present, and also learned about the death of Katsuhiko's biological parents, and came to the following conclusion:
"Besides, you are all medical students, so it's not difficult to get potassium cyanide."

"What! How is this possible! Ke Yan!"

After listening to Police Officer Megure's words, Ke Yan's mother burst into tears.

"No! Mr. Inspector!"

Guan Guxiang retorted in disbelief, "Although Ke Yan is a bit self-destructive, but it has been so many years, why did he commit suicide!"

"Keyan!"

Sitting on the sofa, Watanabe hid her face and wept after witnessing the tragedy of the person she loved before she died.

"Officer Megure, this is absolutely impossible! Mr. Minagawa couldn't have committed suicide!"

At this time, Conan suddenly retorted loudly.

"That's right, a person who accepts chocolate on Valentine's Day, I don't think that would choose to commit suicide."

Gao Yuan immediately stepped forward and added.

"However, if it was not suicide, it could only be poisoned and killed by someone. But until now, no poisonous substances have been detected in all the things the deceased ate before he was alive. Apart from committing suicide by taking poison himself, I really can't think of anyone else. What's the possibility, wise brother."

Somewhat puzzling, Meguro police officer said.

In this regard, Gao Yuan and Conan really have no idea, but Minagawa Katsuhiko did not commit suicide, which is certain, not to mention the suspected threatening letter received by Watanabe Komi, which can indirectly prove this point.

"Hey, Mr. Akechi, when do you think Mr. Minagawa was poisoned?"

At this time, Conan asked Gao Yuan in a low voice.

"The biggest possibility is when drinking coffee and eating cake with everyone."

Gao Yuan also said——

Although according to Haibara Ai, the poisoning time of a small amount of cyanide will be prolonged when the stomach is full, Katsuhiko Minagawa did not eat much today, and Katsuhiko Minagawa is not like in the previous "Fushae" case, He has the habit of taking capsule medicine, so the time from poisoning to poisoning is only a few minutes at most.

"I think so too."

Conan said, "However, everyone ate the same food at that time. Why was he the only one who was poisoned? And it is also strange that no poison was detected from the food he ate afterwards."

"On this point, I already understand how the murderer did it. But how the murderer poisoned me, I still have no idea."

Gao Yuan couldn't help but listen to Conan's words.

"Huh? Mr. Wise already knows who the murderer is?"

"That's right, the murderer can only be that person."

Gao Yuan said, looking at a person, following his gaze, Conan also saw that person, and then, Conan suddenly realized, showing a clear expression:

"Mr. Wise, I understand, the murderer's method of poisoning! I have seen through this method of poisoning without anyone noticing it in front of everyone!"

"Hey?"

Gao Yuan couldn't help being stunned for a moment, but when he heard the words "in front of everyone", he immediately figured out the pass:

"So that's the case, then the incident this time has been solved!"

But Conan scratched his head helplessly at this moment:

"But, Mr. Wise, the motive! The motive for killing! The reasoning without understanding the motive is incomplete!"

"Ah? About this, I know."

As Gao Yuan said, he knelt down and whispered a few words to Conan.

And looking at this scene, Hui Yuan Ai silently watched the communication between the two detectives and the expressions on their faces, and the corners of his mouth turned up slightly——

"Yoshida-san, it looks like they've solved it—this time!"

(End of this chapter)