Yusuke Sakata confessed to his crime.

He also stated his motive for killing:

It turned out that his father used to be a driving school instructor with strict teaching.

The deceased, Nagao, Nishiguchi, Noyasu, and the other three were students of a driving training class that Sakata's father was in charge of twenty years ago.

These six "bad students", because they were dissatisfied with Coach Sakata's serious and strict teaching attitude, conspired to do an extremely bad prank:

They deliberately drunk Coach Sakata at the dinner table, and indulged Coach Sakata, who was already delirious, to drive home after drinking.

They even manipulated the brakes to make it harder for the car to stop.

Asking a drunk person to drive a car that has been tampered with will naturally turn out to be a tragedy.

Yusuke Sakata didn't know about this at first.

But among those six people back then, there happened to be one person who became a serial murderer on the run twenty years later.

When Officer Sakata was chasing down the murderer, he learned the truth from him.

So he secretly imprisoned the murderer, and began to take revenge and liquidate against Nagao, Nishiguchi, Noyasu and other enemies.

"I originally planned to kill the other five people and push the black pot on the murderer who is on the run."

"He was one of the six people who killed my father that year, and he knew Nagao, Nishiguchi and others, and the police would definitely give priority to suspecting that it was this 'wandering murderer' who committed the crime."

"It's a pity... None of my plans are of use now. ”

Yusuke Sakata sighed helplessly.

"Steward Lin, you're right."

"As a police officer, I betrayed the trust of the people and committed an unforgivable crime."

"But... I don't regret it! ”

He gritted his teeth and said:

"It was the six bastards who murdered my father."

"The law can't punish them anymore, so I can only give it!"

Lin Xinyi: "......"

Looking at the murderer with tears in the corners of his eyes, he was silent and did not speak.

In the traditional concept of morality, it is natural to pay attention to the son's revenge on the father.

It is reasonable to understand.

But there are no rules, and as a law enforcer, Lin Xinyi must take a clear stand against this kind of criminal behavior:

"Let's take Officer Sakata away."

"Everyone has to pay for what they do."

"Since you have chosen this path, please take responsibility for it."

The officers swarmed up.

And Yusuke Sakata also completely gave up resistance and obediently tied his hands.

This serial murder case, which shocked everyone in Osaka, came to an end.

"Ugh..."

Seeing Yusuke Sakata being escorted away, Hattori Heizou sighed lightly.

Immediately afterwards, the head of the government police headquarters, who was dignified in his bones, quietly cast a friendly look at Lin Xinyi:

"Supervisor Lin, thank you."

"If it weren't for you, I'm afraid there would be more citizens in Osaka."

"It's just a matter of duty." Lin Xinyi replied casually.

He's not good at polite words, and he doesn't like to be close to people.

What's more, he is still an undercover agent who always wants to pick his son and leave, and he has no ambitions for career development.

So even in the face of Hattori Heizou, a super leader who can be called "Osaka Qi Tongwei" at the level, Lin Xinyi can neither be humble nor arrogant.

Hattori Heizou's eyes were full of appreciation.

He has a strong aura in his own right, and those young juniors in the police circle often look restrained and nervous when they see him.

But Lin Xinyi can talk to him on an equal footing without being humble or arrogant.

"Talented people just don't change."

"It seems that I asked you to come to Osaka for guidance, and I really invited the right person."

In the ears of the Osaka Prefectural Police officers around him, it was like his father boasting about "other people's children".

But now they don't have a problem anymore.

Because Lin Xinyi has proven his strength:

It only took him one meal to solve the serial murder case that plagued the Osaka Prefectural Police.

What's even more embarrassing is that the murderer is still their own person - this is a disgrace to the face of the Osaka Prefectural Police.

"Forest Officer."

In the helpless and admiring gaze of his subordinates, Hattori Heizou continued to release enthusiasm and kindness to Lin Shinichi:

"Although the case has been solved, it is rare for everyone to come to Osaka once, and it would be a pity to go back after two days of fun."

"If you don't dislike it, you can live at my house today, right?"

"There's something I'd like to talk to you about."

......................................

In the evening, Hattori's house.

Walking into this Japanese-style mansion where it is difficult to distinguish whether it is a manor or a wild one, and the courtyard is repaired like a scenic spot, Lin Xinyi knows more clearly in his heart:

Heiji Hattori This is not just a back wave, it is simply a tsunami.

And at this moment, this enviable winner in life is helplessly enduring preaching in front of his father:

"Pingji, this incident should make you more sober, right?"

"You always look down on the work of the police, but you have a lot to learn compared to our forest officer."

Hattori Heizo educated his son with great care.

Lin Xinyi had previously become a "child of other people's family" that he used to stimulate his subordinates, and now this example was used by him on his own son.

"Dad... I know what you're going to say. ”

Hattori Heiji was very unconvinced and said:

"Don't you just want me to give up the idea of being a detective, take over your class, and become a police officer?"

"That's impossible... Either way, being a detective is my dream! ”

"Haha." Lin Xinyi on the side laughed slightly.

He knew what the head of Hattori had invited him to his home for.

In order to ask him to show up and help persuade Hattori Heiji to give up his dream of being a detective and change his career to become a police officer.

Dreams are worthy of respect.

But Lin Xinyi prefers to proceed from reality:

"It may sound a little ugly to say, but the profession of detective will be eliminated by the times sooner or later."

"At the very least, in the investigation of front-line criminal cases, the future will be fully police-led."

In Hattori Heizou's appreciative and expectant gaze, Lin Shinichi naturally said what he expected:

"As long as the police can truly and effectively use the power of forensic science and technology, there will be no case that will definitely need detectives to help."

"Mr. Lin, I know what you mean."

Hattori Heiji insisted on his own philosophy-for-tat:

"Through my conversations with Miss Maori these days, I also know the role that forensic science and technology can play."

"But if the police can use this knowledge and technology, can't the detectives use it?"

"I've been learning..."

"What you know, I, as a detective, will definitely learn."

"No, you're still misunderstood."

Lin Xinyi shook his head and sighed:

"The promotion of forensic science and technology means that the division of criminal investigation procedures is becoming more detailed and standardized."

"Solving cases will increasingly rely on collective strength rather than individual wisdom."

"For example..."

He paused slightly, smiled and asked Hattori Heiji:

"Mr. Heiji, do you think you can finish the scene alone?"

"This..."Hattori was speechless for a while.

In the past, when solving cases, it was all up to detectives to go to the scene and scan it with the naked eye.

And then it's amazing, it's like opening the 'Witcher Vision' with one click:

Those key clues were inexplicably found by the detectives.

But this is more or less dependent on "metaphysics" and luck.

In fact, surveying the site is an extremely heavy task.

It requires multiple police officers, carrying various professional equipment such as multi-band light sources, electrostatic adsorbers, and luminol reagents, and looking for traces inch by inch in the area.

Among them, there are forensic personnel, trace examination personnel, and professional on-site photographers.

Don't think it's easy to take pictures.

In the field investigation, special photography skills are often required, and the shooting method alone is divided into one-way photography, opposite-direction shooting, multi-directional shooting, rotary segmented shooting, straight segmented shooting, and proportional shooting.

Crime scene photography is also a profession that requires a lot of effort to study.

"You said you could study forensic science and technology."

"Forensics, trace examination, on-site photography, so many specialties, how many can you master alone?"

"Even if you can learn it, can you do so much work alone?"

"Well..."

Heiji Hattori said with some embarrassment:

"For on-site investigation, let's let the police officers of the forensic division be in charge."

"As a detective, I only need to reason and analyze the results of their investigation."

"Okay."

Lin Xinyi didn't refute, but continued to ask:

"Have you ever thought about it, can you do the most basic survey work by yourself?"

Surveys sound easy, but in fact they are a lot of work.

Police officers sometimes need to conduct large-scale visits to surrounding residents near the scene, and they have to check dozens or hundreds of homes at every turn.

"I can't do this alone."

Heiji Hattori replied calmly:

"In the past, this kind of work was done with the help of the Osaka Prefectural Police."

"Hmm."

Lin Xin nodded, and then asked:

"Solving a case sometimes requires large-scale access to road surveillance, spending dozens or hundreds of police forces to watch the video frame by frame."

"What are you going to do alone?"

"This..."Hattori shook his head and smiled bitterly: "Road monitoring, I have to ask the police from the traffic department of the prefectural police for help." ”

"For security monitoring, the police officers of the search section must be responsible for the investigation."

"That's good..."Lin Xinyi continued to ask: "If you have collected physical evidence, you have to take it for identification." ”

And the identification of this major work alone is divided into:"

"Department of Forensic Medicine (Body Fluids, Tissue Identification, DNA Identification)"

"Department of Electrical Engineering (Electrical Accidents, Fire Causes, Voiceprints)"

"Department of Mechanical Engineering (Identification of mechanical accidents, causes of traffic accidents, firearms and swords, and identification of traces)"

"Document Authentication Department (Document and Currency Authentication)."

"Faculty of Psychology (polygraphy, ability test, personality test, dialect test, language psychology)"

"Department of Chemistry (Gases, Gunpowder, Oils, Poisons, Drugs, Organic Solvents)"

In a calm tone, he enumerated a long list of different types of identification work.

And each of these jobs needs to be responsible for the corresponding professionals.

"It's still that question, with so much professional content, how many subjects can you learn alone?"

"As a detective, can you complete the identification yourself when you get the physical evidence?"

Lin Xinyi kept asking questions, and Hattori replied stubbornly:

"It's... This is the work of the scientific research institute. ”

"The appraisal work should be handed over to the appraiser of the scientific search and research institute."

At this point, he was almost speechless.

And Lin Xinyi summed up and asked loudly:

"Do you see?"

"If you want to solve the case, you need the external investigation of the search department, the investigation of the forensic department, the identification of the scientific search and research, and the assistance and cooperation of multiple departments such as traffic and road registration management."

"Most of the work of solving the case is done by the police."

"And you are only responsible for one part, that is, the middle of the coordination."

Lin Xinyi paused slightly, and sent a soul-like question to Hattori Heiji:

"In that case..."

"Then Mr. Heiji, what is the difference between you as a detective and a 'police detective'?"

"I..."Heiji Hattori was completely stupid:

Oh, yes...

If all the work has to be done with the help of the police.

Is there a difference between being a detective and being a policeman?

Quietly, Hattori's dream was shattered.