Transmigrated into Conan, his ability is Rhodes Island

After saying this, Akihara Kazumitsu straightened up, crossed his arms in front of his chest, and casually tapped his arms with his fingers.

"So, is the problem with the alarm timing—that the fire actually started to be extinguished, but the system recorded an error in the time, or is there a problem with the smoke detector itself, preventing the fire from being extinguished in time..."

He glanced at the middle-aged employee whose face was turning ashen and who was clearly tense, then turned to look at Matsuda Jinpei.

"What do you think?"

This evidence is very unfavorable to Matsuda Jinpei's speculation, because according to the logic in his theory, the smoke detector should be able to function properly, and ideally, it should be able to take effect at a lower temperature and with only cigarette smoke, so as to match his envisioned method.

"It's not too late to check later. We still haven't checked the fire hydrant tank, have we?" Matsuda Jinpei

Then, a group of police officers, along with Akihara Kazumitsu, followed the middle-aged employee up to the top floor in the elevator.

Tonight is the waning crescent moon, its light silently spilling onto the rooftop, where the twinkling lights of Tokyo can be seen in the distance. The wind is strong on the top floor, whistling through the exposed reinforced concrete. And in the most conspicuous place, there is a cylindrical metal box, two or three meters high, with a protruding top and a metal frame welded around it.

The middle-aged employee pointed to it and explained, "This is what you call the fire water tank... or water tank. The lid can be opened, but no one touches it; it's always tightly closed. The key to this lock is always kept in the control room."

He walked over and demonstrated to everyone how he easily turned on the valve of the water supply pipe leading to the inside of the water tank.

"Normally, to add water, you just need to turn this valve. There's also a water level gauge next to it, so you can see if it's full or not."

With the flashlight strap dangling from his mouth, Matsuda Jinpei gripped the metal frame of the water tank with both hands, used his waist to push off with one foot, and flipped himself onto the top of the tank. He bent down and carefully examined the lock on the tank lid by the light of the flashlight.

"How is it?" Kenji Hagiwara looked up from below and raised his voice to ask his friend in order to drown out the howling wind.

Matsuda Jinpei's slightly resentful face peeked out from the top of the water tank. He looked at Akihara Kazumitsu, as if he were grinding his teeth. "Well, it's all rust and dust on top. It looks like it hasn't been opened for a long time."

A helpless expression appeared on Qiuyuan's face, and the corners of his mouth turned up slightly. He offered a consolation that did little to comfort him: "At least your idea is novel. The fire spray has been turned into a flamethrower. Maybe it will come in handy next time."

As soon as he finished speaking, there was a moment of silence on the rooftop, with only the wind continuing to howl. All the police officers present turned to look at him.

Akihara Kazumitsu laughed and raised his hands in surrender. "Just kidding, just trying to lighten the mood."

……

The police officers, who had returned to the scene, began to inspect the smoke detectors with the assistance of the middle-aged employees.

So Akihara Kazumitsu returned to his happy old home—that rocking chair—and happily lounged in it.

"The last person who used the 'Ge You Slouch' for commercial purposes has already lost 759 million!" the system warned.

Akihara:?

System: Although I'd like to chat with you to pass the time, if I do that, readers will say I'm just padding the story, so—King Crimson!!

Underground parking lot 3:00 am

Police officers who had previously remained at the scene to inspect the smoke extinguishers or to further investigate the victim's network of relationships and whereabouts reconvened at the crime scene. Even Date Wataru, who had gone to notify the forensic pathologist to conduct chemical analysis at Akihara Kazuhiro's request, returned with the results.

Akihara Kazumitsu stood up and naturally joined the police officers' impromptu meeting.

Once everyone had arrived, the section chief gave Matsuda Jinpei a look that they could begin.

He understood and began to report the results of the smoke extinguisher test to everyone.

"Through further inspection of the smoke extinguisher, we found that the problem was with its time delay system. That is, its threshold was normal, it detected the smoke normally, sent an alarm to the control room, and should have immediately started extinguishing the fire, but it delayed for 20 minutes before spraying the fire spray."

At this point, Matsuda Jinpei's lips twitched.

"Ahem, and according to what that employee just said, it seems that when setting up the latency system, the decimal point was accidentally added one place too far to the right..."

Hearing this, the section chief looked at him. "You mean, an accident?"

Matsuda Jinpei nodded with difficulty and replied in a dry voice, "That employee... that's what he meant."

The section chief nodded, signaling for one of the officers to speak.

"I continued questioning the victim's wife. First of all, the victim didn't have any tattoos." The officer glanced at Ida Ko, clearly indicating that Ida Ko had asked him to ask this question.

"Secondly, we have been concerned about the victim's vehicle. The medical company where he usually conducts drug trials is far from here and from where he lives. After combining the answers from his wife, we found his vehicle in the parking lot next door. And in that car, we found anhydrous ethanol with the victim's fingerprints on it."

Matsuda Jinpei's face darkened, not for any other reason, but because he was annoyed by the repeated appearances of anhydrous ethanol, which seemed to offer no help in the case and had repeatedly misled him.

The policeman opened his notebook and continued speaking.

"Next, regarding the issue of the victim's drug trial. This pharmaceutical company is located in the suburbs of Tokyo and its business covers multiple areas, including the production of drugs, medical devices, and health products."

"However, it seems that they do not have a 24/7 customer service hotline. We went through a lot of trouble to contact an employee of the pharmaceutical company, and then we found the department manager through the phone number provided by the employee... In short, the victim has tried many kinds of drugs over the past few months, including new antibiotics, antipyretics and immunosuppressants, etc."

"The most recent one, which was today, was a newly developed antacid from their company."

Seeing that the police seemed to have nothing more to say, Akihara Kazumitsu raised his hand to indicate that he wanted to speak. "Excuse me, but could you please describe the ingredients of the antacid?"

“Okay, the main ingredients of this antacid are aluminum hydroxide and calcium carbonate. It works by neutralizing stomach acid to relieve acid reflux and heartburn,” the police officer said, clearly prepared, glancing down at his pamphlet.

Akihara Kazumitsu nodded, and together with everyone else, they looked at Date Wataru.

Date Wataru took a deep breath and looked back at Akihara Kazuhiro. "You guessed exactly right. The reason the lymph nodes are purple is because they contain manganese ions. Besides that, the forensic experts also detected a special substance..."

He seemed somewhat unable to comprehend the result, and lowered his head again to check his own statement.

"They said it seemed to be a... catalyst?"