In Conan, people have a brain option system

Conan hid behind Dr. Agasa and used the bow-tie voice changer to speak out his reasoning.

Since Sera Masumi was not there this time, Conan had no way to properly check the body.

So he could only use the current observations to determine the cause of death.

After hearing Dr. Agasa's (Conan) reasoning, the police officers present all nodded and showed expressions of sudden enlightenment.

However, the deputy inspector of the Kanagawa Prefectural Police Headquarters obviously still had doubts about the cause of death of Kenji Furusawa.

After all, in Hakone, a place with natural hot springs and close to volcanoes,

hydrogen sulfide poisoning is not a rare case.

"Dr. Agasa, did you judge that the deceased did not die of drowning just because he did not float on the water?"

"In Hakone, hydrogen sulfide poisoning is not uncommon, but there has basically never been a case of death caused by hydrogen sulfide poisoning."

"Generally speaking, hydrogen sulfide poisoning will at most cause coma."

Hearing the words of the deputy inspector, the owner of Koizumi'an, Kunio Koizumi, also interrupted and agreed at this time:

"Yes, this kind of thing occasionally happens in Hakone."

"That is, someone inhaled too much hydrogen sulfide gas unknowingly, causing the head to be unclear and fell into the hot spring."

"And this Mr. Kozawa appeared in the female hot spring area. I guess he probably wanted to sneak into the female hot spring area while no one was there to do some perverted things."

"As a result, he accidentally fell into the hot spring and drowned."

"No, although this situation is possible, the cause of death this time is obviously not drowning."

Conan spoke up and denied the statements of the deputy inspector and Kunio Koizumi.

"First, if the deceased accidentally fell into the hot spring, he would definitely struggle and try to breathe during the drowning process, which would cause a lot of water and air to be inhaled into the respiratory tract."

"Because the airway is partially blocked by water, air and water will mix together and enter the lungs, which will cause the body to float faster."

"This time the deceased did not have this situation, which means that he must have lost consciousness when he entered the hot spring."

"That doesn't mean he died of hydrogen sulfide poisoning, right?"

The owner of the hot spring hotel, Kunio Koizumi, continued to ask.

"At least a forensic autopsy is required to confirm that he really didn't die of drowning, right?"

Generally speaking, if the police want to determine whether a person died of drowning, they must perform a forensic autopsy.

After cutting open the lungs of the deceased, observe whether the lungs of the deceased are over-expanded and whether a large amount of pink foam appears, so as to determine whether the deceased died of drowning.

"In fact, even without a forensic autopsy, it is possible to determine whether the deceased died of drowning."

"Just observe the secretions from the mouth and nose, or use a tracheal tube to obtain a sample of the liquid in the respiratory tract to determine whether there may be signs of drowning."

"The former only requires observation, and the latter can be determined with the help of the equipment of the ambulance."

Conan said.

"In addition, the characteristics of the deceased from hydrogen sulfide poisoning include cyanosis of the skin and symptoms of hypoxia. The muscles of the deceased will also become loose, and the eyes will also be congested."

After hearing this, the deputy police officer of the Kanagawa Prefectural Police Headquarters hurriedly sent police to open the eyes of the deceased.

Sure enough, it was found that under the blue-purple eyelids of the deceased, a pair of eyeballs were congested.

"If it is true as the police officer said, that the deceased was just unconscious because of excessive inhalation of hydrogen sulfide, it is absolutely impossible to have such obvious symptoms of poisoning."

"If you still don't believe what I said, Mr. Koizumi, you can also observe the blood of the deceased."

"Hydrogen sulfide combines with hemoglobin to form sulfhemoglobin, which makes the blood appear abnormally colored. You will understand it as long as you see it."

After hearing Dr. Agasa say this, Koizumi Kunio finally stopped arguing.

The deputy inspector who had been observing the situation on the side looked at Koizumi Kunio with suspicion and asked:

"Mr. Koizumi, you seem to have been trying hard to deny that the deceased died of hydrogen sulfide poisoning."

"Could it be that you know something?"

After hearing the deputy inspector's question, Koizumi Kunio immediately showed a frightened expression.

He quickly avoided the police officer's sight.

And his reaction also made the surrounding police officers more suspicious.

"No, it should have nothing to do with Mr. Koizumi."

Just when everyone began to suspect Koizumi Kunio, Conan spoke again.

"Mr. Koizumi should just be worried that the news that Mr. Furusawa died here due to hydrogen sulfide poisoning would spread."

"After all, if Mr. Furusawa accidentally fell into the water while peeping, it would have little to do with the hot spring hotel."

"And if Mr. Furusawa died here due to hydrogen sulfide poisoning, it is very likely to affect the business of the hot spring hotel."

"After all, everyone knows that hydrogen sulfide may be produced in all the soil near the hot spring area."

"If tourists think that the hydrogen sulfide produced by the hot springs of Koizumi-an is enough to kill them, they will definitely not dare to come again."

After hearing Dr. Agasa's explanation, the police at the scene looked at Koizumi Kunio again.

Then they saw Koizumi Kunio nodded somewhat awkwardly.

Faced with a person who died in his own hot spring hotel, Kunio Koizumi's first reaction was to hope that his business would not be affected.

After realizing this, many police officers present showed a bit of disgust on their cheeks.

But then, Dr. Agasa said something that shocked the police and Kunio Koizumi present:

"Mr. Koizumi, don't worry about this matter."

"Because Mr. Kouzawa's death was obviously not an accident, but a complete murder."

"And the person who did it must be in this hotel and knew Mr. Kouzawa."

When Conan said this, he suddenly heard a group of childish and familiar voices:

"It's finally time for our Junior Detective Team to appear--!"

Everyone present looked in the direction of the voice.

They saw three elementary school students, two boys and one girl, who were posing as detectives and said confidently.

"Hey! What are you guys doing here? Go back!"

When Ai Haibara saw Ayumi Yoshida and the others suddenly appear, she hurried forward and tried to push the little guys back.

However, Mitsuhiko Tsuburaya and Genta Kojima, who were usually very naughty, ignored Ai Haibara's order as expected.

The three little guys all had an extremely serious and solemn expression on their faces.

"Someone actually killed Kamen Rider. This kind of thing is absolutely unforgivable!"