Conan and Gin are both my brothers, what's wrong with meeting them once?

The deceased had bruised eyes and his right hand fingers were twisted abnormally.

Kudo Kazuma didn't observe very closely, since he wasn't there to solve a case anyway.

After absorbing the spirit, he listened to the police officers questioning the other passengers in the car, and he would occasionally glance at Dr. Ida, who was wearing a reversible coat.

Conan tugged at his sleeve and, after he squatted down, asked in a low voice, "So, have you figured out who the culprit is?"

Kudo Kazuma didn't say anything, but just glanced at Dr. Date again.

Conan followed his gaze and looked up, then rested his chin on his hand and whispered, "I also think he's highly suspicious..."

"There were needle marks and blood in the vein of the deceased's left arm, which were obviously signs of injection. If a high concentration of potassium chloride is injected into the body, it will cause the same symptoms as the heart failure that the doctors diagnosed."

"As a doctor, it would be very easy for him to obtain potassium chloride and injection equipment, and given the precise intravenous injection used to kill, the probability that the murderer was a doctor is very high."

"His wiping of the buttons and the large amount of loose change in his wallet were both suspicious, as was his reaction when he heard Uncle Kogoro's name..."

"I just can't understand how he could be on the Yunoyama Line and yet kill the victims on the Hana no Machi Line? There's no evidence, no motive, so we can't confirm he's the murderer..."

"Should we reverse?" Kazuma Kudo shrugged. "I vaguely remember the train making an arrival announcement before the ticket check."

He then lifted Conan to the train route map on the platform, pointed to a station in the middle and said, "Look, the two lines met at this station called Mizunokawa."

"The murderer wasn't in the same carriage as us the whole time. Who knows if he changed trains along the way?"

Conan pointed to the timetable next to him: "Take a good look. Our train arrives at 10:35, and the train to Flower Town arrives at 10:30. By the time our train stops, that train will have already left Mizunokawa Station!"

"It's not that complicated," Kudo Kazuma glanced at Conan. "What, do you think all trains in Japan are punctual, and there can't be any exceptions like delayed departures or arrivals?"

"If that's the case, then we should have been criticized to the skies for not stopping all the cars on the ring road during our birthday celebration."

Like a thunderbolt striking his mind, Conan's eyes lit up: "That's right! I'll go ask the staff on the bus!"

Kazuma Kudo took out his phone and checked the time.

11:20.

There are still twenty minutes until the train to Tokyo departs...

He simply started playing mobile games.

While playing, I suddenly heard an announcement from the train station that shouldn't have been there.

[This is Kogoro Mouri. Please gather in the accounting office if you are involved in the case. Dr. Sato and Dr. Date, please also come along.]

Kazuma Kudo: "?"

Hearing Kogoro Mouri say on the radio that he knew who the murderer was, Kazuma Kudo was speechless.

This unlucky guy is really outrageous.

If we have the evidence, can't we just tell him?

Does he really enjoy stabbing his innocent father-in-law like that?

Didn't you notice that Xiaolan's gentle smile has become much colder?

After sincerely praying for his older brother, Kudo Kazuma followed the others into the tent, where he saw Kogoro Mouri sitting on the sofa with his head down and eyes closed.

The killer immediately questioned, "Have you really found the killer, Detective Mouri? We're very busy!"

"Really? No need to rush." ​​A timely explanation came from Kogoro Mouri's body. "Just wait patiently. We'll solve this case in less than fifteen minutes."

The murderer sat down opposite Kogoro Mouri without any hesitation and questioned him a second time: "Do you want to find the murderer and arrest him within fifteen minutes?"

“That’s right, Dr. Date.”

The killer sneered, directly challenging, "So you mean you want to arrest me?"

Kogoro Mouri was probably speechless. After a moment of silence, he said seriously, "That's right, the culprit in this case is you!"

Hearing Conan's serious tone, Kudo Kazuma shook his head.

This murderer is outrageous.

Why did you provoke him?

"Are you kidding me?" the murderer scoffed. "How could I, on the Yunoyama Line, kill Dr. Utsumi on the Hana no Machi Line? Some kind of clone technique?"

Kudo Kazuma raised his hand from the side: "It's not impossible."

Kogoro Mouri was speechless for a moment: "...You can only be sure you're on the Yunoyama Line train when you're in the same carriage as us a few minutes after you board. If you want to kill someone, all you have to do is transfer at Mizunogawa Station."

Hearing this, the culprit classmate became even more arrogant, pulling out a train timetable and spreading it out in front of Kogoro Mouri: "Do you even know that the Yunoyama Line train arrives at 10:35, by which time the Hana no Machi Line train has already departed!"

"Tell me, in this situation, how do I transfer trains?"

"Is that so?" Conan's voice came through the bow tie voice changer to everyone's ears. "But as far as I know, the train on the Hana no Machi Line was delayed by a few minutes today due to special circumstances... Many people on the train can testify to that."

Upon hearing this, the security personnel replied, "That's right. Based on Detective Mori's deduction, we've investigated. The train was delayed because someone called to say they lost an extremely important document on board, but we couldn't find that document at all."

"So what?" Dr. Date, the murderer, remained defiant. "Even if the person who called sounds like me, how can you prove that I made the call?"

Kudo Kazuma pulled out his ticket from his pocket: "I don't have proof that you made a phone call, but does proof that you weren't on the Yunoyama Line count? There's a ticket check on the Yunoyama Line around 10:40. Where's your ticket? Did the ticket inspector stamp it?"

He was speechless. Other murderers would cry, kneel, and repent after Conan pointed out a suspicious detail, but this one...

I've never seen such an arrogant murderer!

Dr. Ida remained unfazed: "The ticket? That's already lost, so what does that prove?"

After saying that, he stood up with a relaxed air and stretched languidly: "Admit it, you have no evidence that I killed anyone. I think you should try to find other suspects..."

Hearing the other party's nonchalant tone, Kogoro Mouri's voice unconsciously lowered.

"Really? Could you let the police check all those loose change and coins in your wallet?"

Dr. Ida was taken aback: "What?"

He suddenly laughed: "Detective Mouri, you're not going to say you want to check fingerprints, are you? Utsumi and I were together all night, and we even counted the loose change on him. Is it strange that there are his fingerprints on the money?"

Conan, hidden in the shadows, sneered: "It's not strange to have the deceased's fingerprints on the coin, but it is strange to have someone else's fingerprints on it."

"The deceased had bought something from a train vendor before the incident. He gave her a 10,000 yuan bill, and the vendor gave him a lot of coins in change. The murderer, in order to make it look like a robbery, took all the coins from the deceased's wallet..."

"Dr. Date, should we have the police check it out? How did the coins in your wallet, which you've been on the Yunoyama Line, get fingerprints from a vendor on the Hana no Machi Line train?"

Dr. Ida's expression changed; she could no longer be arrogant...