In the face of Yuichi's inquiry, she always interjected when he asked about the key point, and Ayako Ninagawa, who led the suspicion to herself, was a little hesitant in the face of Yuichi's inquiry this time, but she chose to say it after thinking about it and knowing that she would have to explain sooner or later.

"That's because I thought he'd come to me...... By the way, ask me why I broke off the marriage at that time! ”

"Huh? Marriage...... Engagement? ”

Yuichi, who heard Ayako Ninagawa's answer, was suddenly shocked by this new clue, because if you look at it from the divorce, then there is another explanation for Kamata Kohei's death.

"Hmmm! No, I originally planned to marry him as soon as I graduated, but due to some of my own reasons, I was a little afraid of marriage, and I called him again to dissolve the engagement! Since then, Kohei has stopped answering my calls, and even if he encounters him in the hospital, he has avoided it from afar! I didn't want to go on like this with him, but after seeing him and Miss Dancer come to buy drinks, I changed his iced coffee to Coke, hoping that he could come to me to exchange drinks, and I could take the opportunity to talk to him about it! ”

"Huh? Wait a minute! Did you switch to Coke for both cups of iced coffee? ”

Yuichi who heard Ayako Ninagawa say this immediately realized something, and after glancing at the dance clothes of Hongshang, whose face was a little ugly, he immediately asked seriously.

"That's right! I didn't know which one he was going to drink, so I just swapped both for Coke! ”

"That's it! So Miss Mai Hongshang, who has already drunk the iced coffee in her hand, can you explain why you didn't drink the drink in your cup is iced coffee? ”

"Huh? Officer Yuichi! What do you mean? Are you doubting me? Of course I know I've got a Coke! But when I came back, hadn't the drama already begun? So I didn't want to delay the drama, so I didn't change the drink! ”

"Oh? Didn't you tell Mr. Kohei on the side about it? ”

"I saw Kohei drinking, and I thought he had the same idea as me, so I didn't mention it, after all, everyone was watching a drama, and chatting quietly would disturb Yota and Mengmei."

"That's it! Then I have another question to ask Miss Dancer, Mr. Kohei took advantage of the light before the play started, and when he opened the lid and added honey and cream balls, he found that the drink in the cup was Coke, not iced coffee, and there was no honey and cream balls. How do you come back after the play starts, and when the lights have dimmed, you can tell that the cup is a coke instead of iced coffee? Even if you drink Coke, not iced coffee, but what about the cream balls and honey you add to it? Just now, as you told me, iced coffee is too bitter to drink without honey and cream balls! ”

Faced with Hongshang Maiyi's quibble, Yuichi immediately grasped the flaw in her words, shook the drink cup that Hongshang Maiyi had just proved that she had drunk, and sighed with a smile.

After being asked by Yuichi and not knowing how to answer, Hongshang Maiyi's face changed, and he gritted his teeth and suddenly opened his mouth to fight back.

"I don't know why Officer Kudo suspects me of being a murderer just because I didn't say I drank Coke, not iced coffee, but you police always have to talk about evidence when arresting people, right? You say I poisoned Gengping, so where is the poison? Without evidence, I can't believe what you're saying! ”

"Evidence?"

Just as Yuichi was about to talk to Hirogami about what evidence was, suddenly an officer from the forensic department came to him with an ugly face.

"Kudo Police Department! The residue in the cup of the deceased Kamata Kohei has been tested, and there is no trace of potassium cyanate in it, but we have tested potassium cyanate in the saliva in his mouth, so we can now be sure that the deceased died from taking potassium cyanate, but we don't know how the murderer made him take those potassium cyanate! ”

"Oh? Is that so? ”

Seeing that the opposite Hung Shang Maiyi had regained his confident expression, Yuichi suddenly understood why the other party was so confident and dared to challenge him. But will he let the other party go on like this? Dare to slap him to his face Kudo Yuichi, except for gin, there is no one who can live and chic until now.

After confirming that Kohei Kamata had indeed died of potassium cyanate, and that there was no potassium cyanate residue in his cup, Yuichi lowered his head and began to re-sort out the clues he had in his hand.

Just like what Noda Yumemi said when he mocked Maori Kogoro just now, if the murderer directly put the poison in the drink, then he would die directly without waiting for Kamata Kohei to finish the drink in his hand, so the murderer's poison was not in the drink. And in the cream balls and honey, Kohei Kamata didn't add these things! So it's even more unlikely that he's dead, so how did the murderer get potassium cyanate into his mouth?

Looking at the few pieces of ice that melted on the floor before the forensic staff had time to put them away, an idea flashed through Yuichi's mind, and the corners of his mouth couldn't help but rise.

"Miss Noda! Can I ask you a question? ”

"What's the problem? You can just say it, Officer Kudo! ”

"Mr. Kamata, when you drink iced coffee, do you have a habit of crushing the ice cubes that are used to ice it after drinking coffee?"

"Yes! What's wrong? ”

Hearing Yumi's answer, Yuichi suddenly looked at Maii Hirogami, whose face was already a little ugly.

"Placing potassium cyanate inside ice cubes is a brilliant idea! Especially for those who know Mr. Kamata's little habit, it's perfect to use this to kill someone! If I'm not mistaken, Mr. Kamata drove you here today, right? I can guarantee that now I can definitely find the potassium cyanate that the murderer put on the car beforehand in his compartment! In this way, after we know the news of Kamata Kohei's divorce, we can infer that his death is that after he was divorced, he couldn't bear the pressure and committed suicide by poisoning! What a clever plan! ”

Listening to Yuichi's narration, Hirogami Mai's face turned completely pale, and just as she was about to say something.

The forensic staff who had just been sent out by Yuichi walked back from the direction of the bathroom with a somewhat wet wallet.

"Report to the Kudo Police Department! We followed your prompts and sure enough, we found this suspicious wallet in the bathroom! As long as the fingerprints on it are extracted, and then the liquid inside is tested for potassium cyanate, the murderer can be determined! ”

"Oh? Is it? That's great! By the way, this Miss Hongshang Mai's drink cup is also taken for testing, I think you can also test for potassium cyanate in this cup, after all, in order to make sure that after he leaves, no matter how Kohei Kamata takes the drink, he will get iced coffee with potassium cyanate ice cubes, and adding poisonous ice cubes to both cups of coffee is the most correct choice, isn't it? The ice is starting to melt, right? ”

Seeing that the wallet he threw into the bathroom was also found by Yuichi, Yukami Maii, who knew that Yumemi and the others knew the wallet, finally stopped resisting desperately, but took the initiative to confess to Yuichi.