Chapter 19 Section 19

When Kaoru was still writing a report in the meeting room of the Meguro Department, Kusanagi and Kishitani came back with depressed faces. "Has the old man come back?" Kusanagi asked roughly. "The chief should be in the criminal police room." Kusanagi left the room without saying a word, and Kishitani made a reckless gesture at her. "It seems that he is not in a good mood." Kaoru tentatively said. "Because I finally found Mashiba Yoshitaka's former woman." "Hey, is it? Now that he has found it, why is he still acting like this?" "Unexpectedly, the follow-up was unexpected." Kishitani said and sat down on the steel pipe chair.

After hearing his words, Kaoru was also taken aback.Because I heard that the person who can be regarded as Mashiba's ex-girlfriend is dead. "We borrowed the photo of the woman from the publishing house, and then went to the black tea specialty shop where Mashiba Yoshitaka used to go on dates, and confirmed it to the waitress. After seeing the photo, she said that it was absolutely right, it was her. The story ends Thus, the first volume ends. The ex-girlfriend's murder theory proposed by Kusanagi-senpai is completely shattered." "That made him feel bad?" "I'm just as disappointed. After running with him all day, I finally found this result. Ah, I'm exhausted."

Just as Kishitani was stretching, Kaoru's cell phone rang.At first glance, it was Tang Chuan calling.She ran to see him only at noon. "Hi, sorry to bother you just now." "Where are you now?" Tang Chuan asked immediately. "At the Meguro Department." "I thought about it a lot later, and now I think I need you to do something. Can we meet?" "Well... I'm all right—what do you want me to do?" "I'll tell you when we meet. You can specify a meeting place." Tang Chuan's voice sounded rarely excited. "No, if that's the case, I'll go to school to find you..."

"I've already left the school and headed towards the Meguro Office. Please book a place." Kaoru ordered a nearby home cooking restaurant. Yu Chuan said "I see" and hung up the phone. Kaoru stuffed the half-written report into her bag and picked up her jacket. "Teacher Tang Chuan called?" Kishitani asked her. "Yes, you said you have something to tell me." "Wow! If he can solve the mystery of the poisoning method, it will be of great help. You have to pay attention to what he says. The teacher's explanation is quite complicated, so don't forget to take notes."

"I see." Kaoru said and walked out of the meeting room. She came to the home-cooked restaurant that she had made an appointment with, and just sat down and drank lipstick tea when Tang Chuan walked in.He sat down across from Kaoru and asked the waiter for a cup of cocoa. "Have you stopped drinking coffee?" "I'm tired of drinking. I drank two glasses when I was with you just now." Tang Chuan said with a flat mouth, "I called you out suddenly, I'm sorry." "It's okay. Don't you have something to tell me?" Tang Chuan let out a "hmm", lowered his eyes, then looked at Xun and said, "Let me ask you first, do you still have doubts about Mrs. Mashiba?"

"Well... yes, I still doubt her." "Really?" Tang Chuan reached into the inner pocket of his coat, took out a folded paper, put it on the table and said, "Let's take a look." Kaoru unfolded it in his hand to read what was written on it, frowned and asked, "What is this?" "It's what I want to trouble you to investigate. The results of the investigation should not be too rough, but must be precise." "As long as the investigation written on it is clear, can the mystery be solved?" Tang Chuan blinked and let out a sigh of relief: "No, it probably can't be solved. This investigation is to confirm that there is really no solution. In your terms, it can be called a 'verification search'."

"what happened?" "After you went back today, I thought about it a lot. Assuming that Mrs. Zhenchai was poisoned, what method did she use? But I really can't figure it out. I came to the conclusion that this equation has no solution, except for the only One way of answering." "The only solution? Doesn't that mean there is still a solution?" "However, it is an imaginary solution." "Imaginary solution?" "It means that it is feasible in theory, but it is impossible in reality. There is only one way for a wife in Hokkaido to make her husband in Tokyo drink poison, but the murderer has implemented this method. The possibility of the method is infinitely close to zero. Do you understand? In other words, the method is feasible, but it is impossible to put it into practical action."

Xun shook his head and said, "I don't quite understand what you mean. According to what you said, isn't it still impossible in the end? You want me to investigate this just to prove it?" "It's also important to prove that there is no solution." "I'm still looking for answers. Theories don't matter to me. I must find out the truth of the case. This is our job." Tang Chuan remained silent.Just then, the waiter brought cocoa.He slowly picked up the cup and took a sip, whispering: "Yes, it is indeed as you said." "teacher……"

Tang Chuan reached out to pick up the paper on the table, and said: "People who engage in science have a habit. Even if it is an imaginary number solution, they will explore it to the end because of such an answer. But you are not scientists, so you can't prove it. wasting precious time on whether such an answer exists.” Tang Chuan folded the paper and put it back in his pocket, and said with a smile on the corner of his mouth, "Forget about it." "Teacher, please tell me the method of poisoning. Let me make a judgment after hearing it. If I think it is really worth it, I will investigate the content just now."

"That's not okay." "why?" "Once you know the method of poisoning, you will have prejudice in your heart, which will prevent you from investigating objectively. On the contrary, if you are unwilling to investigate, there is no need to know the method. Anyway, now in this I can't even tell you where." Tang Chuanzhong went to get the bill, but Kaoru got it first, and she said, "I'll do it." "That's not okay, I've already let you go for nothing." Kaoru stretched out his other free hand towards him: "Please give me the note from Palladium just now, and I will investigate."

"This is an imaginary number solution." "Even so, I also want to know what is the only answer you are looking for, teacher." Yu Chuan sighed and took out the note again.Kaoru took it, double checked the contents above, and put it in the bag. "If this method is not the imaginary number solution that you said, teacher, then the mystery will be solved, right?" Tang Chuan didn't reply, but pushed up his glasses with his fingertips, and said in a low voice, "How should I say it?" "Is not it?" "If it's not an imaginary solution," his eyes were filled with a sharp light, "I'm afraid you will lose, and I can't win. It means that this is a perfect crime."