Conan: I've been linked to the tech tree system.

Portable solution detection device: A detector manufactured using a special process. It can detect the specific names of chemical substances contained in a solution.

"Moreover, NaOH is a relatively stable solute. Even if the entire solution evaporates at high temperatures, the remaining NaOH will crystallize into a solid and remain in the aluminum can."

Toru Tono inserted the detector into the solution, and after 5 seconds, the word "NaOH" was clearly displayed on the detector screen.

It is sodium hydroxide.

......

Conan, who was listening nearby, almost wanted to applaud Tohru Tohru.

He truly hadn't expected his neighbor to be so capable, possessing such rigorous and seamless reasoning while also effortlessly producing an instrument for analyzing the composition of a solution.

It was probably because Tohno Toru, being an invention enthusiast, had more frequent contact with sodium hydroxide, a common laboratory item, that he discovered the truth faster than Tohno.

But it's still impressive.

How about I become your detective?

......

Tohru Tohno certainly knew how the culprit made the solution evaporate, since the instrument he used was bought from him.

He just never imagined that his invention of using high temperatures to remove fingerprints could be used in this way.

While theoretically, turning the instrument to its maximum power would indeed release enough high temperatures to evaporate liquids... it would probably overload and break down in no time.

The short period of time it's turned on might not be enough to completely evaporate the moisture.

It's unbelievable that he dared to do that.

Chapter 11 Blue Skin, Round Head

"Sodium hydroxide is a highly corrosive strong alkali that releases heat when dissolved in water. If added to a beverage at room temperature, it will be easily detected."

"But the murderer was obviously very familiar with Ms. Matsumoto's habits, knowing that she liked to drink warm beverages, and would not have noticed anything amiss."

Tohno Toru really wanted to complain that sodium hydroxide is a strong alkali. Didn't you feel a sore throat when you drank it?

How much must one love someone to drink half of a beverage knowing it's poisonous?

Toru Tono expressed his incomprehension but respect.

"So, the murderer is very likely someone Ms. Matsumoto knows?"

Inspector Megure, as was his habit, took on the role of the straight man, his sharp gaze sweeping across everyone present.

"Yes."

Tohru Tono filled a paper cup with water and moistened his throat.

“The ones who had come into contact with lemon black tea at the scene and knew Matsumoto’s habits very well,” Toru Tono said, pointing to the suspects as if he were in a scene from Shinichi Kudo’s manga, “are Ms. Kazumi Takenaka, who is Ms. Matsumoto’s best friend, and Mr. Toshihiko Takasugi, who is the groom!”

The people present showed expressions of shock and all moved half a step away from the suspect.

Suddenly under the spotlight of so many people, Takenaka Kazumi and Takasugi Toshihiko's expressions turned somewhat unpleasant.

"What? How could I be the murderer!"

Junyan's face suddenly became very excited, and he shouted out loud.

Conan looked at him thoughtfully.

Come to think of it, it seems like these two aren't the only suspects...

Conan, looking completely naive, walked up to Matsumoto Kiyonaga, pointed at him, and said, "Hey, aren't you including this person too?"

"This old man also came to the bride's room just now?"

Inspector Megure, who was listening nearby, was sweating profusely.

Tohru Tono mentally gave Conan a thumbs up.

As expected of you, you have insightful observations.

You're cut out to be a detective!

While Conan is right in some respects, you can just have doubts in your mind, why actually say them out loud?

If a veteran detective like Matsumoto Kiyoshi really made a move, do you think you could trick him out of it with just a few words?

Mr. Washing Machine's emotional intelligence is indeed worrying.

Inspector Megure wiped his sweat and tried to smooth things over, saying, "Hey, hey, would the sheriff really give his own daughter away like that...?"

“That’s right, the child is absolutely right.”

Matsumoto Kiyonaga didn't seem to mind and interrupted Inspector Megure.

"Logically speaking, I should also be one of the suspects."

"Yes...that's true."

Matsumoto Kiyonaga turned to Tohru Tono and said, "Even if your previous reasoning was correct, there are at least three suspects at the scene. How are you going to identify the real culprit?"

Tohru Tohno smiled confidently: "This will suffice."

He then took out a small square iron box from his pocket, with two protruding round tentacles on the front of the box.

Portable chemical reaction detection device: A detector manufactured using a special process. It can detect the exact time when a chemical reaction occurs.

Tohno Toru took the aluminum can used as evidence, emptied the water inside, inserted the metal box's tentacle into the can's opening, and stuck it to the inner wall of the can, while explaining the principle of his device to everyone.

"Simply put, my invention calculates the time of a chemical reaction by detecting the degree of corrosion or the degree of fusion after a reaction occurs."

"Because sodium hydroxide will definitely damage the aluminum inner wall of the can after it dissolves, we can find out the exact time when the perpetrator poisoned it by using this device to test it."

A short while later, Toru Tono pulled out the small box and looked at the numbers displayed on it.

"The reaction occurred one hour and forty-five minutes ago, which is 1:43."

"I called an ambulance the moment I saw Ms. Matsumoto collapse. If I remember correctly, the time was 1:45."

"Considering that if the murderer used a capsule to poison the poison, it would take about ten minutes for the capsule to dissolve, which means that anyone who entered before 1:33 can be ruled out as a suspect."

"If it was 1:30, that's exactly the time Inspector Matsumoto would have been here," Sonoko added, recalling that she had just glanced at the clock.

"And Ms. Takenaka had already been to the room before Inspector Matsumoto, which means..."

"That means the only possible culprit is Mr. Toshihiko Takasugi, who had just entered the room shortly before the staff came in to remind everyone that the ceremony had begun!"

All eyes were on Takasugi Toshihiko, who was looking down and whose expression was obscured. His expressions ranged from shock to resentment.

......

Conan was completely astonished by Tohru Tohno's series of actions.

In all his years of solving cases, Shinichi Kudo had never seen anything like this.

Are you Doraemon? How come your pockets are full of inventions?!

Conan carefully recalled the two devices that Tohru Tono used in this case and realized that if they were used together, it seemed that even an ordinary person could solve the poisoning case.

Then what's the point of having me as a detective!

Conan was startled, feeling an unprecedented professional crisis.

But then I thought about it again, and realized that most of the cases I solved were not like this one, where the suspect was clear and the sequence of events was well-defined. The cases were always complex and ever-changing.

Criminals always use clever methods to shift suspicion or hide key clues.

Without a detective's meticulous observation skills, extensive knowledge base, and rigorous logical reasoning ability, solving a case is extremely difficult.

It's not as simple as just determining when the poison was administered to solve the case.

Thinking this way, Conan felt a little more at ease.

"However, Toru Tohno is indeed a formidable rival..."

Conan thought about Tohno Toru's meticulous logical reasoning and vast knowledge in this case, and felt that if Tohno were to combine that with his inventions, he might really be able to solve no case for a detective like himself.

"A high-tech detective, huh...?"

Conan looked at Toru Tono, his eyes seemingly burning with fierce fire.

"Alright, then let me, as a representative of traditional detectives, meet you!"

......

Tohru Tohno, of course, had no idea that Conan had inexplicably come to regard him as a rival.

At this moment, Takasugi Toshihiko had already confessed to being the murderer. He was busy watching Takenaka Kazumi, who had tears in her eyes, tell Takasugi Toshihiko the story of how he and Sayuri were each other's first love. He thought it was even more exciting than an idol drama.

Even if Toru Tohno knew Conan's thoughts, he would only think that Shinichi Kudo had lost his mind.

After all, in his mind, the crime scene is not a detective's stage, and solving cases is not a detective's job.

If detectives do everything, then what's the point of keeping a bunch of police officers around?

Besides, he had no interest in solving cases, and without the points awarded by the system, he wouldn't bother showing off in front of so many people.

Incidentally, it seems that because there was no real danger, the system only gave Tohno Toru 100 detective points for that case, which was hardly enough to even begin to count.

It's better than nothing, but it's still another step towards the goal of upgrading.

After all, the main purpose this time is...

Tohno Toru watched as Matsumoto Kiyonaga, having learned that his daughter was alright and vented his joy, gradually approached him, and it was as if he saw a whole bunch of Fukuzawa Yukichi waving at him.

Chapter 12 Two Transparent Children

After a brief exchange with Matsumoto Kiyonaga and the establishment of a strategic partnership, Tohru Tono bid farewell to Ran and Sonoko, who was infatuated with him, saying "You look so cool when you're deducing things," and prepared to find a restaurant for a casual meal.

Overall, Toru Tohno wasn't entirely satisfied with the deal. He had hoped to reach an agreement directly with the Metropolitan Police Department, which would not only solve the problem once and for all but also ensure his safety to a certain extent.

However, when he made this condition, Matsumoto Kiyonaga refused on the grounds that "he could not represent the Metropolitan Police Department" and said that he could represent the First Investigation Division and pay out of his own pocket to buy the invention patent in Tohno Toru's hands.

Tohru Tohno originally wanted to make some quick money by selling patents, but the problem was that without the skill of "basic modification," other people couldn't make those inventions using the same method!

So they could only say they wanted to keep the patent in their own hands, but could provide products to the First Investigation Division.

Matsumoto Kiyonaga thought about it and agreed. He had originally planned to equip each department with only one set, so the demand wasn't large. Buying ready-made products would save some money, so he agreed.

Tohno knew that his performance in this one case alone would not be enough to gain the veteran detective's complete trust.