Chapter 197: Miss Sera is poisoned by hydrogen sulfide

After Vermouth left and confirmed that Chianti had died, Conan hurried back to Kosenan.

He looked at the empty first-floor lobby and the deserted front desk of the hot spring hotel and had a very bad feeling in his heart.

Conan came to Kunio Koizumi's room and began knocking on the door desperately.

However, he knocked for a long time but did not get any response.

When Conan realized that the badge communicator he gave to Masumi Sera was taken by Vermouth, he realized that the situation was not good.

In addition, only Vermouth and Chianti had just come out of the hot spring hotel, and Sera Masumi was nowhere to be seen.

At this moment, I knocked on the door but got no response.

Therefore, Conan's bad premonition became more and more serious.

"Please don't be in any trouble, Ms. Sera."

Conan thought about it and ran to the front desk on the first floor. He "luckily" found a room card on the counter.

He placed the room card on the room card encoder at the front desk, and then used a computer that opened the hotel management system to grant the room card permission to open the door of Gu Quanbang's male room.

Then Conan took the room card and ran back to the door of Kunio Koizumi's room, swiped the door open and walked in.

As soon as Conan opened the door, he felt a sudden wave of heat hitting him.

It was much hotter inside Kunio Koizumi's room than before Conan left.

Conan could hear the whistling sound of the air conditioner in the living room before he even walked into the room.

At the same time, after seeing Sera Masumi lying on the ground, it was unclear whether he was alive or dead.

The bad premonition in his heart suddenly reached its peak.

"Ms. Sera!"

Conan shouted and hurried to Sera Masumi's side.

At this time, Masumi Sera, who was lying on the ground, looked very pale, and did not wake up even after Conan shook her body.

Conan tested Sera Masumi's breath and only breathed a sigh of relief after confirming that Sera Masumi was still breathing.

As long as you're not dead, there's still a chance.

Conan quickly took out his cell phone, called the emergency number, and called the police.

After that, he began to observe Sera Masumi's situation.

But apart from her red and swollen eyes and pale face, there were no other distinctive features of Masumi Sera.

"Ms. Sera did not suffer from the massive blood loss that Vermouth suffered, and there were no external injuries."

"So he must have been knocked unconscious by Vermouth during the fight?"

Conan thought about it and felt more and more strange.

"Since Miss Sera had fainted and completely lost her ability to fight, why didn't Vermouth take the computer away and was in such a mess?"

Of course Conan doesn't want anything to happen to Masumi Sera.

However, given the situation just now, the fact that Sera Masumi was able to survive was strange in itself.

Then I think of what Vermouth had said before: "So you didn't know."

Conan quickly realized that there might be someone else besides Sera Masumi who had just fought with Vermouth and Chianti.

'Who is it?'

"It seems that Miss Sera was able to survive, and Vermouth and Chianti were in such a state, all thanks to that person."

"But the only people who knew about this deal were me, Ms. Sera, and Mr. Koizumi."

"Even Inspector Okamura of the Kanagawa Prefectural Police Headquarters didn't know about this transaction."

Conan felt very confused.

At the same time, he also began to observe the situation in the room.

There were many traces of fighting in the room. There were dents on the wall caused by vases and cracks caused by daggers.

Scattered on the ground were fragments of the vase, as well as liquid that should have leaked out of the broken vase, and several plants that were originally planted in the vase.

'I always feel that the traces of fighting in the room are not as intense as I imagined.'

Conan observed the situation in the room and thought in his mind.

At the same time, what Conan found most difficult to understand was the air conditioning in the room.

"The temperature and wind speed of the air conditioner were both set to the maximum. Someone must be trying to cover up something."

Generally speaking, if the temperature at the crime scene is not right, it is usually because the murderer wants to use the temperature to control the speed of corpse transformation and blood oxidation.

But this time, Sera Masumi did not die, so this could not be the case.

"And the windows in the room were all opened. They were clearly closed before."

Conan was thinking about the various suspicious points found at the scene, but he was unable to find any useful clues at the scene.

"It seems that we can only understand what happened after Miss Sera wakes up."

About 6 or 7 minutes later, the sounds of ambulances and sirens were heard outside Kozenan.

Many ambulances rushed over.

Conan led the paramedics and carried Masumi Sera and the unconscious staff of Kozenan into the ambulance and took them away.

After examination, it was found that Masumi Sera had multiple bruises on his body.

Especially in her abdomen, there was very severe subcutaneous bleeding.

What shocked Conan was...

In addition to the injuries caused by the fight, Masumi Sera also showed symptoms of hydrogen sulfide poisoning.

"The patient's symptoms included shortness of breath, loss of consciousness, loss of balance, severe headache, puffy eyes, pale complexion and drowsiness."

"Judging from the patient's clinical symptoms, this should be a symptom of poisoning by high concentrations of hydrogen sulfide."

"The patient, Ms. Sera, was probably exposed to hydrogen sulfide at a concentration of around 100 ppm."

"Exposure to hydrogen sulfide at this level for just a few minutes can cause serious health consequences."

"Thankfully, Ms. Sera wasn't exposed to hydrogen sulfide for a long time, so as long as she inhales high concentrations of oxygen and receives thiosulfate treatment, she should be able to recover quickly."

Masumi Sera's attending physician explained the situation to Conan.

'Hydrogen sulfide poisoning?! Hydrogen sulfide again?!'

Conan was shocked when he heard this.

He quickly informed the Kanagawa Prefectural Police of the situation and asked them to test the concentration of hydrogen sulfide in Koizumi's room and the surrounding air.

Hydrogen sulfide is heavier than atmospheric air.

So it easily accumulates in low-lying areas on the ground.

Masumi Sera fainted in Kunio Koizumi's room, so she must have shown symptoms of poisoning there.

Such a high concentration of hydrogen sulfide should not be easy to diffuse.

——Conan thought so, but the final result was completely different from his judgment.

The Metropolitan Police Department carefully tested the concentration of hydrogen sulfide in Kunio Koizumi's room and in the air around his yard.

The result showed [0.001%], which was not unusual at all.

After Conan learned the news,

he suddenly understood why the air conditioner in the room was turned to the maximum and the window was fully opened.

(End of this chapter)