Coroner Ke Xue

Chapter 636 The criminal police’s method of solving crimes

The atmosphere at the scene suddenly became a little strange.

Okiya Subaru was calm on the surface, but his heart was filled with turmoil.

Miyano Akemi was nervous and instinctively cast an inquiring look at Lin Xinyi.

Lin Xinyi seemed to understand the worry in her eyes, but he just stood there with a subtle look and did not give any more reaction.

And Belmod stood there calmly, but his hand silently pressed down on the pistol hidden in his waist.

And just then.

A voice broke the delicate calm.

The person who came was an on-site police officer assisting in the investigation:

"Manager Lin, Megure Police Department, we have called and inquired about the customer Mr. Imai mentioned."

"The testimony he provided is correct. The client can help him prove:"

"He and the deceased, Mr. Dejima, have been working at the client's company from this morning to this afternoon."

"We just left the client company together one hour ago, that is, half an hour before the incident."

The news sent back by the police was not that important.

But it brought everyone's thoughts back to reality and the case in front of them.

So Lin Xinyi also withdrew his gaze and asked Imai Tetsuo:

"Mr. Imai, it seems you are right."

"Let me ask again by the way."

"After you and Mr. Dejima left the client company together, did you still stay together?"

"Have you been on your way, or have you been to other places and stopped at other places along the way?"

"This." Imai Tetsuo hesitated for a moment.

Then he replied: "No, we have been heading back since we left the client's company. We did not separate on the road and did not stop at other places."

"Okay." Lin Xin nodded, as if he didn't care: "Well, Mr. Imai"

"Please go on."

"This" Seeing that the question he just asked was unknowingly ignored by Tetsuo Imai, Subaru Okiya couldn't help but frown slightly.

He is still very concerned about:

Who is that old friend who sounds very similar to Kana Asai?

Could it be that Tetsuo Imai and Sohei Dejima, two ordinary poster designers, would know Miyano Akemi?

Maybe this will be a breakthrough to help him find Mingmei!

Okiya Subaru wanted to know this.

But now Lin Xinyi, who is very perceptive, is next to him, and everyone continues to chat about the case.

He didn't want to act too eager, so he had to hide these questions in his heart for the time being and prepare to learn more about them later.

So Okiya Subaru also asked in a decent voice:

"Mr. Imai, you just said that you and Mr. Dejima accidentally chatted with Ms. Asai. What happened next?"

"Then..." Imai Tetsuo recalled carefully: "Then Ms. Asai said that she was still in a hurry and it was not convenient to talk more."

"So I bought another can of ice Coke for Mr. Dejima."

"While picking up this can of iced Coke, Mr. Dejima also noticed the can of iced oolong tea placed in the outlet."

"I advised him not to drink this drink of unknown origin but he still drank it."

"Yes." Miyano Akemi also helped describe: "Mr. Imai did try hard to stop it."

"But Mr. Dejima didn't take it seriously."

"He also said that he should drink the tea as soon as possible while it is still cold, and the result was"

She sighed deeply, her expression a little complicated.

Dejima Sohei was one of the few old family friends to her, but now he died inexplicably.

Professor Hirota, who was once very kind to her, is said to have been accidentally killed by his own students.

Is she really a woman who brings bad luck?

Miss Akemi, who had little friendship and understanding of Conan, could not help but fall into deep self-doubt.

But at this time, Okiya Subaru suddenly looked over with some concern:

"Wait, Miss Asai"

"What, what's wrong?" Looking at the other party's suddenly serious eyes, Miyano Akemi's heart tightened for no reason.

But Subaru Okiya only asked about the case:

"You just said that Mr. Dejima said before his death that you should drink the oolong tea as soon as possible while it is still iced?"

"Yes. Is there a problem?"

"It's not a problem, but it's a clue."

Okiya Subaru looked at the oolong tea can thoughtfully:

"As far as I know, under today's average temperature, if you take a can of ice drink out of the refrigerator and put it in a place without air conditioning or air conditioning like the outlet, it will probably be around 3. It heats up to a room-temperature drink within 40 minutes.”

"That means people can no longer feel the 'ice' at all."

"Of course, the specific time required for the ice drink to reach normal temperature needs to be proven through on-site experiments."

"But roughly speaking, we can also say this:"

He paused slightly and gave the clues he noticed:

"Since Mr. Dejima picked up the drink, this can of oolong tea was still 'ice'."

"Then this can of oolong tea should have just been taken out of the freezer, no more than 40 minutes ago."

"In other words, the murderer placed this can of oolong tea at the outlet 40 minutes before the incident -"

"He should have just left when the incident occurred!"

Okiya Subaru gave a refreshing reasoning.

The mysterious murderer seemed suddenly no longer so mysterious.

Everyone was in a daze, feeling that a door to the truth had suddenly opened.

But the door is only open a little.

"Even if you know this, it doesn't seem to be of much help, right?"

Miyano Akemi, who was very concerned about this case, couldn't help but think deeply:

"40 minutes is enough for the murderer to escape far."

"What's more, more than half an hour has passed since the incident."

"It's probably impossible to find an unknown murderer in a huge crowd of people who has been running away for more than an hour, right?"

Miyano Akemi's question also caused hesitation among the police officers at the scene.

Yes, this clue is there, but it seems to be useless.

But Lin Xinyi suddenly said:

"No this clue is very useful."

He glanced at Okiya Subaru with admiration:

Okiya Subaru's discovery may not directly solve the mystery of the case.

But it pointed out a direction for the investigation——

This little jar of iced oolong tea has a lot to do!

"Memu Police Department."

Lin Xinyi carefully observed the packaging of the can of poisonous tea, and suddenly said to the police officer beside him:

"Please do me a favor and open this vending machine."

"Huh?" The Mumu Police Department was slightly startled.

Although he didn't know what Lin Xinyi wanted to do, he quickly cooperated and completed it as ordered.

Soon the door of the vending machine was opened, revealing a refrigerator containing drinks.

"Look at those iced oolong teas that are the same as 'Poison Tea'."

"The production date and production number on it."

Lin Xinyi prompted and ordered.

"Production date and production number?" Mumu Police Department still didn't respond.

But Subaru Okiya had already realized his intention:

"I see."

“Vending machines are loaded with goods in batches and by ‘box’.”

"The vending machine management company also purchases the goods in batches and in boxes."

"And the drinks in the same box, or even several boxes of drinks in a row, are products produced continuously by the same factory, the same production batch, and the same assembly line."

"So the production numbers on the packaging of these beverages will all be the same."

"The production date will be the same day, the same hour, the same minute, even the same second."

That is to say

"Just compare the production number and production date of this can of 'poisonous oolong tea' with the iced oolong tea in this vending machine."

"We will know that the murderer bought the poisonous oolong tea elsewhere before committing the crime."

"I bought it from this vending machine on the spot."

Lin Xinyi gave the answer.

The Mumu Police Department finally understood his intentions.

After a simple comparison, everyone quickly discovered:

"It's different. It's actually different!"

"The production dates of the 20 cans of iced oolong tea stored in the vending machine were all on a certain day a month ago."

"But the production date of this jar of 'poisonous oolong tea' was very recent, even this week, just three days ago."

"And judging from the production numbers and origins, their production batches and production factories are also different."

"The oolong tea in the vending machine was produced in Saitama Factory."

"This pot of poisonous oolong tea was produced this week at the Chiba factory."

The answer is obvious:

"The murderer did not buy iced oolong tea from this vending machine."

"He bought oolong tea elsewhere in advance, poisoned the tea, and then brought it to this vending machine."

but

The Mumu Police Department looked over again with confusion:

"Knowing all this, it seems like you still can't find the murderer, right?"

"Of course this won't help us find the murderer directly."

"But it can help us find a breakthrough."

Lin Xinyi sighed helplessly:

Forensic methods are not easy to use now.

Then you should use criminal police methods to solve crimes.

In the past, these ideas should have come from the criminal police team of the Positioning and Search Division.

As a forensic scientist, he just needs to do his job well.

But now.

Seeing that the Mumu police department was used to lying around, the answer was put on their faces and they still looked confused.

Lin Xinyi knew that he would have to make a guest appearance as the management officer of the First Investigation Section:

"The reason why the production number on the beverage exists is to facilitate the manufacturer to distinguish the production batch of the beverage, and to facilitate emergency recalls and traceability investigations after quality problems occur."

"This investigation mechanism can be used to deal with quality issues, and naturally it can be used to handle cases."

He paused slightly and gave instructions carefully:

"Contact the manufacturer of this oolong tea, especially the Chiba factory that produced this can of 'poisonous oolong tea'."

"Tell them the production date and production number."

"Let the manufacturer find out as soon as possible when this batch of oolong tea was put into Tokyo and the rice flower market, and find out which supermarkets, stores, and convenience stores have purchased this batch of oolong tea."

"Okay!" Memu Police Department nodded and immediately followed the instructions.

The impact of this kind of "poisoned coke" incident is really bad. Faced with the huge pressure to solve the case, the Metropolitan Police Department had to put aside its usual slow and bloated attitude and suddenly burst into unprecedented efficiency.

And oolong tea manufacturers also know what this sudden "poisonous tea case" means...

If the case is not solved for a day, no one will dare to buy his oolong tea.

And they are just a well-known local company in the Kanto region, not Coca-Cola, which was a big business in the past and was not afraid of influence.

If this case is not solved for a long time, they may not be able to survive for long and will go bankrupt.

So within a few minutes.

The oolong tea manufacturer that received the notice of the Metropolitan Police Department's investigation quickly responded with terrifying efficiency:

"According to the production number and production date on the can, this can of 'Poisonous Oolong Tea' was filled and produced three days ago at the Chiba Beverage Factory, workshop 1, assembly line 2, at 11:45:14 in the morning."

"This batch of beverages left the factory yesterday and arrived at distributors' warehouses in Tokyo."

"From this morning to noon, dealers will put them on the market in Tokyo one after another."

"As for the supermarkets, shops, and convenience stores that purchased this batch of oolong tea, lower-level dealers will have to provide detailed lists."

"The oolong tea manufacturer is urgently contacting dealers and a complete list should be given soon."

The Memu Police Department hurriedly gave out the investigation results.

Lin Xin frowned when he heard this.

Then there was a period of thoughtful silence.

"What, what's wrong?"

Everyone looked over in confusion.

At this time, Lin Xinyi was heard carefully pondering the beverage sales information just provided by the manufacturer:

"This batch of drinks was released to the Tokyo market one after another at noon today."

"And merchants who have purchased this batch of goods generally will not deliver the newly purchased drinks to the counter on the spot."

"Even if the oolong tea on the counter happens to be sold out and needs to be replenished, it will definitely take some effort for the merchants to replenish and stock the goods at the counter."

"In other words, the earliest the murderer can buy this can of oolong tea is this afternoon."

Lin Xinyi quietly highlighted the key points:

"This time is not far from the time of the crime."

"Subaru Okiya has also analyzed it. Judging from the fact that Mr. Dejima still thinks the drink is 'cold', this can of oolong tea was just taken out of the freezer within 40 minutes before the incident."

"This" everyone lowered their heads thoughtfully.

Imai Tetsuo's expression became slightly unnatural.

"Mr. Lin, you mean"

Miyano Akemi's eyes lit up and she tentatively said:

"The murderer probably bought this can of oolong tea from a nearby store within 40 minutes before the incident?"

"That's right." Lin Xin nodded.

Then he turned to the Memu Police Department and ordered:

"Memu Police Department, please try your best to mobilize the idle police forces from the Search Section, each district police station, and the local police station."

"Combined with the list of purchasing merchants provided by the manufacturer."

"Central to the crime scene, a 40-minute walk, no"

"All businesses within a 40-minute drive that have purchased this batch of oolong tea will be investigated."

"In supermarkets, convenience stores, and even vending machines, you should also ask nearby businesses and residents if they have noticed anyone buying this brand of iced oolong tea recently."

Lin Xinyi gave his method of solving the case.

"Huh?" The Mumu Police Department was shocked:

40 minutes drive

If such a circle is drawn on the map, half of Tokyo must be included in it?

Even if there is a purchase list provided by the manufacturer, the number of qualified merchants to be investigated is definitely not a small number.

"Do all so many stores need to be checked?"

"if not?"

Lin Xinyi sighed helplessly:

"Is it an easy job to be a detective?"

The police are not detectives, and they cannot solve the case instantly every time they hit their head.

They are better at using stupid methods.

However, this stupid method of using massive police force to "search mountains and seas" is something that famous detectives cannot learn and cannot do.

This requires a great collective effort and the dedication of countless police officers.

"So this is a case that a famous detective can't solve."

"Only we police can break it!"

Lin Xinyi cast an encouraging look at the Mumu Police Department:

"Megure Police Department, now is the time to investigate the performance of Class 1——"

"This time you are the protagonists!"

"I, I" Mumu Police Department was excited.

Even the police officers from the first search section were excited:

They have been serving as backdrops for famous detectives for many years. Finally, it’s time for them to take charge alone!

"Forest Manager, please rest assured——"

"Our search section will definitely try our best to find out the case!"

The Mumu Police Department solemnly stated its attitude.