In Conan, people have a brain option system.

Chapter 10 is about Akikawa-kun killing his own mother, right?
"My sister is a sophomore and about the same age as me, which means I am about 20 years old now?"

"It's really surprising. I originally thought the original owner was just a high school student."

Akikawa Sosuke listened to Takuto Nakajima telling him about his sister, while at the same time sorting out the information he had captured from his words in his mind.

"He repeatedly confirmed with me whether I had insomnia or not. In other words, the doctor detected sleeping pills in my body last night."

"That's why they concluded that I was committing suicide."

When Akikawa Sosuke was in the bathroom just now, he couldn't be sure whether poison or sleeping pills were detected in his body.

Although this is not entirely accurate, sleeping pills can become poison if taken in large enough quantities.

What Akikawa Sosuke was mainly concerned about was the method by which the original owner chose to commit suicide.

Depending on the type of drug, the half-life of its concentration decreasing in the human body also varies.

As long as the concentration of the poison in the body is detected, the time when the poison was taken can be calculated.

Akikawa Sosuke still held on to the hope that he was not the murderer, so he couldn't help but consider the tiny possibility that the original owner was really innocent.

"The police have already concluded that I took the sleeping pills after the woman died. There seems to be no point in continuing to think about this issue."

Just when Akikawa Sosuke was laughing at his own naive thoughts.

The words of Takuto Nakajima beside him once again caught the attention of Sorasuke Akikawa.

"Speaking of which, my sister is really troublesome. She has liked to talk back to mom since she was in junior high school. I thought it was just puberty, but now she is still often in conflict with mom at this age."

"This...is like this..."

Akikawa Sosuke pretended to be unsure of how to respond and spoke haltingly.

"After talking about my sister's insomnia, you started talking about the relationship between my sister and my mother?"

"So, the woman who died in the car was indeed the original owner's mother?"

After Akikawa Sosuke determined that the original owner was most likely abused by the woman in the same car and was placed under house arrest, he made his guess.

I didn’t expect that she was really the original owner’s mother.

"So the original owner, who had been imprisoned by his mother since childhood, prepared sleeping pills and a dagger in advance, intending to kill his mother and then commit suicide on the day he went out with his mother?"

"The detectives must have thought of everything I could think of. But they haven't come to arrest people yet, which means the evidence is not conclusive yet..."

"Besides the fact that my fingerprints were not on the murder weapon, they were unable to get any definitive answers from the witnesses?"

"Because I unlocked the car, it created the possibility of a third party committing the crime."

"As long as this possibility is not ruled out, they have no way to convict."

"Since the original owner took the sleeping pills after his mother died, he should have witnessed this non-existent 'third party'."

"If I want to convince the detectives and the police, the story I tell about my mother's murder must be plausible."

"If my description of the third person didn't match the details of the original crime scene, the detectives would immediately realize that I was lying..."

"How could I have noticed so many details when I woke up yesterday?"

Unable to travel back to yesterday and observe the crime scene again.

Akikawa Sosuke concluded that he only had one way to obtain information -

That is the detective in front of him who is chattering about the relationship between his sister and mother.
-
Takuto Nakajima complained to Sosuke Akikawa for a while about the bad relationship between his sister and his mother.

Then he looked at Akikawa Sosuke and asked curiously:

"Although it may be a little presumptuous to ask this question when your mother is in danger, I wonder what your relationship is like with your mother, Akikawa-kun?"

"This has nothing to do with Mr. Nakajima, right?"

"I'm just a little curious."

"Well, the relationship is pretty good, right..."

Akikawa Sosuke avoided Nakajima Takuto's gaze evasively.

Naturally, Takuto Nakajima could not miss this scene.

Rather, for a detective who is better at observing people's expressions than most people, Akikawa Sorasuke's lying skills are obvious at a glance.

"But, after your mother was murdered, Akikawa-kun didn't seem to show any sadness."

"If they really have a good relationship, this shouldn't be the reaction, right?" Nakajima Takuto's attitude was no longer as gentle and kind as it was at the beginning, and his tone gradually became heavier.

At the same time, he moved closer to Akikawa Sosuke, staring at Akikawa Sosuke's eyes that didn't dare to meet his gaze, and continued to exert pressure.

"No, it's just that it was too sudden and I don't know."

Akikawa Sosuke's words gradually became incoherent.

Takuto Nakajima could tell at a glance that Akikawa Sousuke was trying his best to find an excuse, but he was too nervous to form complete and fluent sentences.

"Akikawa-kun, please stop lying. You are a really bad liar."

"Just a little bit. The relationship is not good."

Akikawa Sosuke said this in a low voice, then raised his eyes and secretly glanced at Nakajima Takuto, whose attitude suddenly became scary.

It was as if he wanted to see whether the nurse in front of him, who had suddenly become scary, believed what he said.

"Ugh--"

I saw Nakajima Takuto sigh deeply.

"I want to do my best to help Akikawa-kun."

"Eh?!"

Akikawa Sosuke's eyes widened, revealing an expression of shock and confusion.

"It was Akikawa-kun who killed his own mother, right?"

Nakajima Takuto said in a deep voice.

"what--?!"

As if someone had stabbed him in the lower back with a knife, Akikawa Sosuke screamed and shrank away from Nakajima Takuto.

But how could Takuto Nakajima give Akikawa Sosuke a chance to catch his breath? He immediately stood up, stretched out his hands on the small table with the dinner plates, and leaned over to look at the pale-faced Akikawa Sosuke.

"answer my question."

"No, I didn't. Mom, didn't she die in a car accident?"

"Mom was driving... and accidentally hit the guardrail. That's why she died."

"That's not right. Ms. Ryoko was rear-ended after she braked suddenly, which is why she hit the guardrail!"

Takuto Nakajima looked at Akigawa Sosuke's heavy breathing due to lack of oxygen in his brain due to extreme tension and pressure, and made a judgment in his mind.

From the moment Akikawa Sosuke started to fabricate the cause of Akikawa Ryoko's death, he was already certain that it was Akikawa Sosuke who killed Akikawa Ryoko.

It was because it was Akikawa Sosuke who caused the car accident that he wanted to cover up the cause of the accident.

"What a pathetic kid, he didn't even know that the police could tell what happened to the car before the accident just by looking at the tire tracks on the ground."

"Even though the dagger was still stuck in his mother's body, he still said that his mother died in a car accident."

"What a clumsy lie."

Takuto Nakajima reached into his pocket and quietly turned on the recording button of the recorder.

Although recordings without the other party's consent have no legal effect.

But a recording of the prisoner's personal confession can be a strong piece of evidence.

"You still want to lie to me? Ryoko was still alive after the car accident. Stop pretending. You killed Ms. Ryoko, didn't you?"

Takuto Nakajima once again emphasized his tone and repeated his question.

In addition to continuing to put pressure on Akikawa Sosuke who was on the verge of collapse, it was also to allow the recorder to clearly record his own problems.

"You need to provide evidence when you speak. I clearly saw my mother after the car accident..."

Nakajima Takuto looked at Akikawa Sosuke, whose eyes were red and he looked like he was about to break down and cry.
Knowing that Akikawa Sosuke has reached his limit.

He reached out and tore off the hospital gown on Akikawa Sosuke, revealing his thin shoulders with clear bones.

Nakajima Takuto pointed at Akikawa Sosuke's shoulder, which had no scars at all, and sneered:

"You want evidence, right? Here's the evidence!"

(End of this chapter)