Conan: The Mechanic

"After giving the patient both a 5% sodium bicarbonate solution and a 20% mannitol solution as you requested," Gregory, Hoshino Kaede, and Chiba returned to Nagano's HCU ward, the Gregory team was C on duty immediately reported. "The patient's vital signs have gradually stabilized, and brain waves have started to become active again."

"Very good," Gregory sat on the chair in the ward. "Then we can wait for the sleeping prince to wake up."

At this moment, something suddenly sounded from Gregory's body - it was a bp machine.

"..." Gregory glanced at the numbers above, and after that, a hint of surprise flashed on his face. "Three young men and five children are coming to visit."

"?" Qian Yu raised her eyebrows.

Five children... Why does he always think that it might be someone he knows... If Conan called out the little guys and Haibara after he disappeared, it would be exactly five people.

……

Qianyu stood in the stairs and looked at her phone. At this moment, Conan came in from downstairs.

"Where did you go before?" Qianyu asked. "You added that toxicology test? Did you go to the scene?"

"Investigate the case," Conan explained with a smile. "I understand who is responsible for his illness."

"Who did it?" Qian Yu frowned, but fell into deep thought. "Speaking of which, Mr. Gregory had already detected the poisonous gas methyl bromide in Mr. Nagano's home before, and then he said he had understood it, and he didn't check what happened to the poisonous gas..."

"Mr. Gregory is a doctor. Even if he can investigate how the methyl bromide came from, it does not mean that he will investigate the deeper reasons." Conan spread his hands. "And I'm here on behalf of I found a deeper reason - and this reason is also related to one of his three apprentices!"

"Huh?" Qian Yu was stunned.

At this moment, something in the pockets of Chiba and Conan rang at the same time—it was the communication badge that Nagano Hiroshi gave them before.

When they pressed the communication button, Gregory's voice came over. "Aren't you two going to come? Especially the kid with glasses—I want to see what the little guys say about the surprises you can give; and I also want to talk to you about fake orders. Discuss."

Conan's mouth twitched. "Uh... ok, I'll be here soon."

Hanging up the badge, Qianyu and Conan walked out of the door beside Qianyu together.

……

When they returned to HCU, Hiroji Nagano had woken up and seemed to be in good spirits. And Haihara and others, three apprentices of Nagano Hiroji, Mrs. Nagano and Gregory and their team have all gathered in this large ward - if it is a general ward, it is impossible to accommodate them, but this HCU Quite roomy, even with all of them it's not too crowded.

"You are here too," Gregory glanced at Qianyu and Conan who walked in. "Well, Mr. Nagano, we have already investigated the cause of your disease."

"Why?" Mrs. Nagano asked.

"Mrs Nagano," Gregory asked. "When did you buy this house?"

"Well," Mrs. Nagano thought for a while. "About twenty years ago."

"A second-hand house?" Gregory continued to ask.

"Yes." Mrs. Nagano nodded.

"Sure enough," Gregory nodded. "Then it all makes sense."

"What do you mean by that?" Mrs. Nagano asked strangely.

"Your house is not the only child," Gregory turned his cane around. "Decades ago, this house probably shared the same central air-conditioning system as the house next door through a pipe buried in the ground. I don't know the exact reason, maybe the person who sold the house to you The owner of the house next door?"

"However, the workers who were fumigating next door couldn't have known that, so they performed the methyl bromide fumigation directly in that house, and the methyl bromide went directly into your abandoned but unsealed house with the air conditioning pipes. The central air-conditioning duct eventually leaked out."

"Then why am I fine?" Mrs. Nagano asked. "If that's the case, should I be poisoned too?"

"You are indeed poisoned," Gregory shrugged. "Your previous blood sample was tested by us for methyl bromide, and the results showed that your body contained a certain amount of methyl bromide, but it was only because the content was not particularly high that there were no serious symptoms. As for why the content in your body is not particularly high …”

"The molecular formula of methyl bromide is CH3Br, and the density of air is about the same as that of a gas with a molar mass of 29 (between ethane and ethylene), which means that methyl bromide is heavier than the mass of air, so after the leakage from the central air conditioning pipe There will be more methyl bromide staying on the ground floor of the house - although Mrs. Nagano has a single bed in your room~www.readwn.com~ Mr. Hiroji Nagano is used to sleeping on the ground, so he inhaled far when he slept. More than your methyl bromide. So, when Mr. Nagano hits the threshold, your methyl bromide levels won't be too big."

At this moment, Conan suddenly spoke up.

"Or there is a possibility that someone inserted the baffle into the pipeline of the central air-conditioning system when no one was paying attention, and drained all the methyl bromide into Mr. Nagano's room."

"Am I right? The owner of the house next door, the son of the former owner of Nagano's house." Conan turned his attention to one of the three apprentices - if Chiba remembered correctly, he was just before he discovered that Nagano Hiroshi was in a coma. It is speculated that he may be looking at the one with Tang Sancai...

"What do you mean?" The apprentice who was watched by everyone looked at Conan angrily.

"Just 20 minutes ago, the biochemical personnel of the Metropolitan Police Department raided the house next door under your name - don't worry, they got permission from the superior." Conan said. "And then found a small fan working in the pipes connecting your house to the Nagano house - this fan was constantly blowing methyl bromide towards the Nagano house."

"And just a minute ago, they entered the Nagano house to conduct a raid and found a plastic baffle with your fingerprints in the duct of the central air conditioner, and this baffle blocked most of the flow of methyl bromide. into Mr. Nagano's room."

"Now, are you willing to speak for everyone here?" Conan leaned against the glass wall. "The reason you want to do this, I believe you must have some reason for it? Let me tell everyone.