Chapter 17 Section 17

Judging from the whereabouts notice board, only Tang Chuan is in the research room at this moment. Of course, this is not accidental, but because she aimed at this time. Kaoru knocked on the door, only to hear an indifferent "Come in" from the door.She opened the door and saw that Tang Chuan was busy making coffee, and he used the method of drip coffee pot with filter paper. "You came just in time." Tang Chuan poured coffee into two cups. "It's really rare. Don't you use a coffee machine?" "I just want to experience the mood of those poor and fastidious people. The water is mineral water." Tang Chuan said and handed one of the glasses to her.

Kaoru said "Then I'm not impolite", took a sip, and felt that he was still using the same ground coffee as usual. "How is it?" Tang Chuan asked. "The taste is not bad." "Compared to usual?" Kaoru hesitated for a moment, then asked, "Do you want to hear me tell the truth?" Tang Chuan showed an impatient expression, and sat down on a chair with a cup in his hand: "You don't need to answer, it seems that you feel the same as me." He looked at the coffee in the cup, "Actually, I just used tap water Cooked it once, and to be honest, it tastes exactly the same, at least I can't feel a difference."

"I don't think it's usually felt." "But the chefs agree that the taste will be different." Tang Chuan picked up a document and said: "Water has hardness, and the calcium and magnesium ions contained in each liter of water are converted into calcium carbonate. The value can be obtained. According to the order of content from low to high, the water can be divided into three types: soft water, medium hard water and hard water.” "I've heard of it too." "For ordinary cooking, soft water is suitable. The key is the calcium content. If you use water with high calcium content when cooking rice, the plant fiber in the rice will combine with calcium, and the cooked rice will be dry. Damn."

Kaoru frowned and said, "This kind of meal is not delicious." "On the other hand, when cooking beef soup, I heard that hard water is used. It is said that the blood contained in the muscles and bones will form alkaline water with calcium, which is easy to remove. This is good for making clear soup. way." "Do you also cook by hand?" "Occasionally." Tang Chuan put the document back on the table and said. Kaoru imagined him standing in the kitchen, thinking of him frowning as he adjusted the amount of water and heat, it must still look like he was doing some scientific experiment.

"By the way, what happened last time?" "The analysis results of the forensics department came out. I'm here to report to you today." As he said, Kaoru took out a document from his satchel. "Let's listen to it." After speaking, Tang Chuan took a sip of coffee. "No toxic substances were detected on the filters and hoses. But at the same time, it was confirmed that even if poisons were indeed poisoned, the test results would be normal due to repeated flushing of tap water. The bigger problem is yet to come." Taking a deep breath, Kaoru looked at the document again and said, "Because the dust and other accumulated dirt are attached to the surface of the filter and hose, judging from this state, it is extremely unlikely that someone has touched it recently. That is to say, if Some people have taken it down, so there will be traces. In addition, there are some supplementary materials. Not long after the incident, the forensic department investigated the bottom of the pool. The purpose of the investigation at that time was to find toxic substances. At that time, they had moved There are old lotions and containers in front of the machine, and it is said that the only place on the floor where these things are placed is free of dust.”

"In a nutshell, not only the filter, but the entire underside of the sink hasn't even been touched for a while, right?" "That's the opinion of the forensics department." "This is within my expectation. I had the same impression when I first saw the bottom of his pool. Well, there should be one more thing I asked you to confirm, right?" "Understood. You're asking if it's possible to inject poison into the purifier from the tap side, aren't you?" "This question is more important than that. What's the answer?" "It may be possible in theory, but it is not feasible in reality."

Tang Chuan took a sip of the coffee, perhaps because it was too bitter, he curled his lips. "Teacher, your point of view is that the murderer may use a long and thin straw like a gastroscope to pass through the faucet to the hose of the water purifier, and then inject toxic substances into the straw. But in fact, no matter how you do it, you can't succeed." The specific reason is that the branch opening leading to the side of the water purifier is almost at a right angle, which cannot allow the straw to pass through smoothly. If it can be made into a special tool with a movable head, it may be possible..."

"Enough, I know." Tang Chuan scratched his head and said, "The murderer in this case will not spend so much trouble. It seems that the water purifier has to be given up as soon as it is mentioned. Originally thought that this would be a Good idea, it seems that we have to change our thinking again. There must be a blind spot somewhere.” Tang Chuan poured all the coffee left in the coffee pot into his own cup, maybe because his hand was shaking a little, he spilled some.Kaoru heard his tongue click. So he gets restless, too, she thought.Maybe he was annoyed that he couldn't solve the simple question of where the poison was.

"What are the detectives doing?" Tang Chuan asked. "I went to Mr. Mashiba's company, and it is said that I went to inquire about the situation." "Ok?" "Mr. Kusanagi, what happened to him?" Yu Chuan shook his head, took a sip of coffee, and said, "It's nothing, I met Mrs. Mashiba when I was with Kusanagi two days ago." "I heard about it." "At that time, I talked to her for a while, and I felt that she was indeed a beautiful woman, and she was full of charm." "Teacher, you are not immune to beautiful women, are you?"

"I'm just making an objective assessment. Having said that, I'm a little worried." "Did something happen?" "When he was in school, he once picked up cats. They were two newborn kittens. At that time, both of them were quite weak. Anyone could tell at a glance that it was difficult to feed them. But he still brought them back. Club activity room, skipping classes to take care of them. He found an eyedrop bottle and tried every means to feed them milk. Soon a friend advised him that no matter if he took care of them, he would not live long, and his answer was 'that So what'." Tang Chuan blinked and cast his gaze into the air, "The way he stared at the wife of the deceased that day was the same as when he took care of the cat. He has already noticed something from the wife of the deceased, and at the same time , I guess he was also thinking the phrase 'so what' in his mind."