In Conan, people have a brain option system.

Chapter 82: Let’s End for Now
"Mr. Taiga, you should also know Mr. Kosaka who just died, right?"

Sera Masumi's sudden words startled Ohkawa Takao who was standing beside him.

Seeing Ohkawa Takao's surprised expression, Sera Masumi immediately started to explain:
"You were too decisive in running over here after hearing the scream just now."

"Usually when someone is found to be unconscious, the first thing to do is to shout at the patient to confirm whether the patient is still conscious and then determine the cause of the patient's coma."

"You skipped this step and asked me to get the AED after testing his pulse and breathing. This means you knew in advance that Mr. Kousaka would fall into a coma, right?"

"Or, in your opinion, Mr. Kosaka himself might be in a coma?"

Ohkawa Takao was extremely shocked by Sera Masumi's sharpness.

Although the reason why Sera Masumi judged that he knew Kousaka Tsunekazu sounded a little far-fetched.

But look at the determined tone in Sera Masumi's voice after he said this.

Apparently this "handsome" detective revealed the details when he was giving first aid to Tsunekazu Kosaka.
I have already determined in my heart that I must know Tsunekazu Kousaka.

Ohkawa Takao wanted to deny it.

But he thought that if the police investigated, it would be easy for them to find out the relationship between him and Tsunekazu Kousaka.

So he decided not to hide it any longer and nodded.

"Yes, I do know Mr. Kosaka."

"Mr. Kosaka was a guest of my hospital and came by to make some minor adjustments."

Upon hearing this, everyone looked in surprise at the fat Tsunekazu Takasaka lying on the ground.

No one expected it.

Even someone like Tsunekazu Takasaka would go to a plastic surgery hospital for adjustments.

Ohkawa Takao continued:

"I don't know why Mr. Kosaka fell into a coma, but I have heard that Mr. Kosaka has problems with his respiratory system and even needs to use a ventilator when he sleeps."

"So I wonder if Mr. Kosaka suddenly developed symptoms such as respiratory arrest, leading to a coma?"

"So that's it."

Sera Masumi nodded, then turned to look at Sato Miwako and whispered to her:
"Officer Sato, please send an officer to check if Mr. Kosaka has any asthma inhaler on him."

"Besides, since this Takasaka needs to borrow a ventilator to sleep, he probably won't ask the Suzuki Group to help prepare a room."

"Just in case, let's check whether Mr. Kosaka has booked a room."

"This can also determine whether Mr. Ohkawa is lying."

"Ok."

Sato Miwako nodded.

Masumi Sera did not doubt too much what Ohkawa Takao said.

Because the things he described can be found out immediately with just a little investigation.

Regardless of whether he was involved in Kousaka Tsunekazu's death, there was no need to lie to himself.

Sato Miwako passed on Sera Masumi's suggestion to her subordinate detective.

Masumi Sera came to Conan's side and whispered to him:
"Boy, have you found any clues?"

"Although the place where Mr. Kosaka fell was messy, his food had basically been eaten up."

"However, from the residue and soup left in the plate, we can still roughly determine what Mr. Kosaka ate before he died."

"But this time the banquet is a self-service one. Except for the meat grilled on site or the sushi made on site, all other food has been pre-packed on plates."

Conan said. "That is to say, if Mr. Kosaka really died of poisoning, then it is unlikely that the murderer poisoned the food in advance."

"Because there is no guarantee which dish will be taken by Mr. Takasaka. If a large area is poisoned, there may be a large number of deaths, which will only increase Mr. Takasaka's vigilance."

Masumi Sera also understood the meaning of Conan's words.

I also feel more and more that this case is beginning to move towards an unexpected situation.

Let alone the suspects, after investigating for so long,

Even the cause of death of the deceased and the method of the murderer are unknown.

"No, there is another possibility, a method that can carry out large-scale poisoning without worrying about affecting people other than the target."

"That is, something that is fine for ordinary people, but is 'extremely poisonous' to the target."

"For example, if Mr. Kosaka is allergic to peanuts, then if peanuts are added to his food, it is very likely to be serious enough to endanger his life, while ordinary people will not have any unusual reactions after eating it."

Conan explained.

But after he said this, he fell into thought again.

"But this method is difficult to implement based on the current clues."

"First, according to what Dr. Ohkawa said just now, Mr. Kosaka needs a ventilator when he sleeps, so he must be suffering from 'sleep apnea syndrome' which is common among obese people."

"In addition, even if we take into account conditions such as high blood pressure, fatty liver or cirrhosis, diabetes, and high blood lipids that often occur in obese people, there is nothing that would cause choking if eaten."

"So if there is a murderer, and the murderer's method of poisoning is a specific food that only works on Mr. Kousaka."

"Then Mr. Kosaka must have some problems that we don't know about, and the murderer must be very familiar with Mr. Kosaka."

"If we want to start identifying suspects, we should investigate everyone at the banquet who is familiar with Mr. Kosaka and confirm whether they have a motive to kill Mr. Kosaka."

"Of course this is based on the premise that this is really a murder case."

Upon hearing this, Sera Masumi nodded, agreeing with Conan's point of view.

"If the cause of death was poisoning, then it would be murder."

"However, judging from the condition Mr. Kosaka displayed after his death, suffocation is more likely."

"In this case, it is very likely to be an accident."

Conan pointed to the plate that needed to be taken away by the Metropolitan Police Department for ingredient testing and showed it to Masumi Sera, who handed it to the police from the Forensic Division.

Afterwards, just in case, Masumi Sera once again investigated the airway of the deceased Tsunekazu Kousaka.

After confirming that Tsunekazu Kousaka did not choke to death due to something stuck in his throat, the possibility that doctor Takao Ohkawa used first aid to cover up the crime was also ruled out.

The two detectives' investigation came to an end here.

This time the deceased did not show signs obvious enough to determine the cause of death.

Therefore, we must wait for the results of the autopsy and determine the cause of death before we can continue to judge whether this is an accident or a homicide.

at the same time.

On the other side, the police who were searching for belongings on the deceased and the police who went to the hotel front desk to investigate the deceased's stay also returned.

The results showed that Tsunekazu Takasaka did not have any asthma inhaler on him, and the hotel had no record of Tsunekazu Takasaka checking in.

This is the end.

This time, the sudden death of Director Kosaka has come to an end for the time being.

After Sato Miwako sent someone to register everyone present one by one, she asked everyone to leave the banquet hall and secured the scene.

(End of this chapter)