Traveling back thirty years to Conan, intercepting Princess Eri

At this point, Eri Kisaki suddenly froze.

Her words came to an abrupt halt, and she stood frozen in place, as if she had been immobilized.

Yukiko was startled by her appearance, and she waved her hand in front of Eri's eyes.

"Hey, did you think of something? If you did, just say it! Don't be like Shuichi!"

She knew that Lin Xiuyi often did this when he was thinking—suddenly spacing out, and then suddenly blurting out a key deduction.

This is the most worrying time, because you don't know when he will come back from that world.

Eri Kisaki didn't keep her waiting for long.

A few seconds later, a smile appeared on the girl's lips.
"Now I know why Yuuki Matsuzaka went back to the cafe."

Yukiko paused for a moment, then stamped her foot in frustration: "Keep going! Glasses girl, you're not trying to hog all this, are you? We found this place together! If you dare to hide it from me, I'll never forgive you!"

Eri glanced at her with annoyance, her eyes filled with a mix of helplessness, mockery, and disdain, as if to say, "How can you be so stupid?"

"Didn't I just explain the reason?" she replied calmly.

"What did you just say?" Yukiko scratched her head anxiously, trying hard to recall every word Eri had just said.

"There was a wound on the back of the deceased's neck. Who would have thought that he was actually poisoned..." Eri Kisaki reminded him.

Yukiko blinked, then blinked again.

Then, her eyes widened suddenly.

"what do you mean……"

Her voice trembled slightly with excitement.
"Matsusaka Yuki returned just to prick the victim's spinal cord in the neck? Just to create a fake wound and mislead the police?"

Eri Kisaki's smile deepened: "Tsk tsk, some people finally understand."

She deliberately dragged out the last syllable, her tone practically overflowing with sarcasm.

But at this moment, Yukiko had no time to be angry; her brain was buzzing with shock at this reasoning.

If this is true, then the murderer's plan was absolutely flawless.
First, Kosuke Iguchi was poisoned to death with drugs. The manner of death was very quiet; there was no struggle or screaming, just like when he was asleep.

Then, after the waiter discovered the body and caused a commotion, the murderer took advantage of the chaos to approach the body, pretending to try to save it, and stabbed the victim in the back of the neck with something to create a seemingly fatal wound.

In this way, the police's attention will be completely drawn to the wound, and all the investigations will revolve around "who stabbed the victim with a sharp weapon".

They will investigate the murder weapon, the suspect, and the time of the crime, but they will never think to investigate the drugs.

Because the cause of death was so obvious that no one would suspect it.

If they hadn't stumbled upon the medicine bottle, and if Eri hadn't happened to know the properties of digoxin, this plan would have been almost impossible to uncover.

"But……"

Yukiko tried to calm herself down and began to look for flaws in this reasoning.

"That's just your guess. Don't forget, the police report said that apart from the girl who had coffee with Kosuke Iguchi, no one else came near him!"

The more she talked, the more confident she felt she had found a breakthrough, and her voice grew louder. "The waitress was in the store the whole time, and there were so many customers watching! Do you think Matsuzaka Yuuki could stab him from several meters away? If she got close, she would definitely be spotted!"

Eri looked at her with the same look she gave an idiot.

"You're stupid, and you won't admit it."

The girl snorted, her tone even more sarcastic.
"The police report states that no one had approached Kosuke Iguchi during the time before the coffee shop waitress discovered his death."

Yukiko paused, then changed the subject.
"But what happens after the waitress discovers the person is dead?"

Yukiko was stunned.

"After the body is discovered, there will definitely be chaos."

Eri Kisaki continued, speaking at a moderate pace.
"Waiters will scream, customers will crowd around, some will call the police, and some will be at a loss. In such a chaotic situation, if someone approaches the body, saying they want to see if it can still be saved, or that they want to help with resuscitation, will anyone notice?"

“Even if someone notices, they’ll just think she’s doing a good deed,” Yukiko murmured, starting to follow Eri’s train of thought.

“Yes.” Eri nodded. “Moreover, when most people see a corpse, their first reaction is fear and disgust; they would never examine it carefully.”

"Who would lean in and examine the back of the deceased's neck closely under those circumstances?"

Yukiko understood completely: "So, all the murderer needs to do is use the pretense of resuscitation to get close to the victim, then stab him in the back of the neck to create a fake fatal wound..."

“Then, when the police arrive and begin their investigation, everyone’s attention will be drawn to that wound,” Eri Kisaki continued. “They will wonder, who stabbed the victim with a sharp weapon? Where is the weapon? How did that person get close? But they will never think that the real cause of death was actually drug poisoning.”

The two girls looked at each other and saw surprise in each other's eyes.

This time, the two of them beat Lin Xiuyi to the punch and found the murderer ahead of time.

But after the initial surprise comes more realistic reflection.

Yukiko murmured, "To prove what you're saying, we need enough evidence."

“Of course.” Eri nodded and began to analyze clearly, “To prove this reasoning, we need three things.”

She held up three fingers.

"First, the fingerprints on the medicine bottle. If this medicine bottle really belonged to Matsuzaka Yuuki, it must have her fingerprints on it. We just need to hand the medicine bottle over to the forensic department and have them do a fingerprint comparison."

"Second, we need to confirm that Matsuzaka Yuki approached the body after the waiter discovered Iguchi Kosuke's death."

"We can ask the waitress or other customers about this. There weren't many people in the store at the time, so someone should remember."

"third……"

She paused, her brows furrowing slightly.

Yukiko said impatiently, "What's the third one? Tell me quickly!"

“Thirdly, it’s that thing she used to stab Kosuke Iguchi in the neck,” Eri Kisaki said in a deep voice. “That thing must be similar to a needle, very thin and very sharp, so that it can pierce such a small wound without causing too much bleeding.”

Yukiko thought for a moment: "But the police have searched the entire cafe, even the outside, and found nothing. If the murderer threw something so small away, where would they find it?" (End of Chapter)