After investigating the cause of Tequila's death and solving the explosion murder case, Lin Xinyi returned to normal work as usual.

Everything was the same as before, except for the fact that Belmode was still clinging to him like a kraft candy.

This "girlfriend" who can't get away from him goes to work with him, goes home together, and personally prepares him dinner in the evening that is said to be his favorite when he was a child.

Gradually, Lin Xinyi became a little accustomed to the existence of this Belmode teacher.

The day passed peacefully.

Until the next morning.

Something big happened to the Metropolitan Police Department:

When the Twilight Police Department was out for morning exercise, when they were passing by the grass in the park, they were attacked by a guy who was squatting in the grass with a crossbow and was hit by an arrow in the stomach.

The Twilight Police Department was immediately hit by an arrow and fell to the ground, while the murderer took advantage of the chaos to flee the scene safely.

Luckily, the fat layer in the Twilight Officer's abdomen was thick enough, and the short bolt didn't make it through his biological armor, only slightly injuring him.

But even if it is only a minor injury, it is an extremely egregious attack on the police.

Therefore, Lin Xinyi and Mao Lilan were immediately invited to the park where the attack on the police occurred, and was responsible for the investigation of the crime scene.

"Mr. Lin, there is nothing left at the scene except for a few footprints that happen to be printed on the soil."

After some investigation, Mao Lilan seriously reported his work:

"The footprints left by the murderer have a low height of the starting and landing feet, many pick marks on the tips of the forefoot, and many scratches on the heels."

"The forefoot pressure is light and the heel pressure is heavy, and the forefoot pressure is significantly transferred to the back foot..."

"Judging from the characteristics of this weak walking footwork, as well as the shoe style reflected in this footprint, the murderer who attacked the Twilight Police Department with a crossbow should be a middle-aged man between the ages of 35~55."

Her analysis is sound enough.

But this information alone is far from enough to find the murderer:

"It's a troublesome situation..."

Lin Xinyi sighed softly:

"According to witnesses at the scene, the killer was wearing motorcycle gloves and a motorcycle helmet, and there was not a single skin leakage on his body."

"As a result, it will be very difficult to find the hair and dander he left behind."

"As for the footprints... Although the age and gender of the murderer can be roughly deduced, it is still far from sufficient evidence to prove the murderer. ”

"Not to mention, we can't find where the others are right now."

Lin Xinyi encountered the most difficult case:

The murderer covered himself tightly, suddenly appeared and shot an arrow, and then slipped away on a motorcycle with the murder weapon.

Nothing was left at the scene but a few footprints, and witnesses could not see his face at all.

"Really... There isn't even much surveillance in the park. ”

"If the monitoring density is large enough, this kind of case will not be so troublesome."

Lin Xinyi sighed silently in his heart:

In fact, he has long been suggesting to the Metropolitan Police Department to find a way to increase the density of surveillance coverage in the Tokyo metropolitan area.

As long as you can install monitoring wherever it should be monitored, many seemingly tricky cases can be easily solved.

However, Minister Odakiri told him...

The Metropolitan Police Department itself has said that the large-scale installation of surveillance in Tokyo does not count.

This kind of major municipal project has to be decided by the Tokyo Metropolitan Government and has to be discussed and decided by the Diet.

After a set of cumbersome processes, it would have to be a year later to start the "Skynet Project" as Lin Xinyi envisioned.

"One year..."

Lin Xinyi shook his head helplessly:

Regardless of whether the monitoring can be put in place in a year, anyway, the role of surveillance cannot be counted on in this case now.

And judging from the pitiful clues at the scene, it is basically impossible for them to find the murderer from the vast sea of people.

The only clue left to keep an eye on is...

A short sword, a short sword made of paper with a peculiar shape.

"Mr. Lin, why did the murderer leave this short sword?"

Maoliland was very puzzled by this.

"It's not a good word, but it's never a good sign."

Lin Xinyi's gaze became very solemn:

According to the various criminal cases he has come into contact with and studied, the murderer deliberately left this special object with no practical significance at the scene, mostly to create his own "criminal characteristics".

This is the "brand" that the murderer designed for himself.

And this kind of murderer who makes a "brand" often does not commit the case only once.

"Let's hope nothing happens again..."

Looking at the somewhat inexplicably familiar paper short sword in front of him, Lin Xinyi couldn't help but be a little worried.

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

The next day, as Lin Xinyi worried... Something unfortunate happened.

In the morning, Maolilan's mother, Concubine Mile, received chocolate adulterated with pesticides, ate it and was poisoned and hospitalized.

Although the people were rescued without danger, such an attack was still terrifying.

Similar to the situation yesterday when the Twilight Police Department was attacked, the killer placed a paper flower on the poisoned chocolate gift box sent to Fei Miao.

In the afternoon, Dr. Asasa's house...

"What was left behind when I attacked the Twilight Police Department was a short sword, and what I left behind when I attacked Xiaolan's mother was a paper flower."

"What do these two things mean?"

Conan waited for Dr. Asasa to help him tune his newly developed solar skateboard while he analyzed the case with great interest.

Although Lin Xinyi and Xiaolan don't take him to play when they go out to handle cases, out of the instinct of a detective, he will still pay attention to the case through Xiaolan in private, and quietly help Xiaolan do some analysis and reasoning:

"In short, what is certain now is that the murderer must have something to do with Uncle Maori."

"After all, the only thing that the two victims, the Twilight Police Department and Xiaolan's mother, have in common is that they both know Maori Kogoro."

"So... Could these two attacks be the revenge of the killers against Uncle Maori? ”

"When he was a criminal police officer ten years ago, he arrested a lot of prisoners, and some of them should have been released after completing their sentences."

"It's very likely."

Conan was very engaged.

And a cold voice quietly sounded in his ears, interrupting his self-talk:

"Kudo, you're here?"

Talking Gray Plains mourning.

For some reason, now Gray Plains' desire to research an antidote is even more urgent than Conan's.

Therefore, she would go to Dr. Asasa's laboratory almost every day to conduct intensive research and experiments, hoping to develop a APTX4869 antidote as soon as possible.

At this moment, Gray Plains had just taken time off from his heavy research to rest.

She walked out of the lab and was about to make herself a cup of coffee, when she saw Conan, who had just arrived at Dr. Asasa's house.

If it was before, seeing this Conan classmate who is currently positioned as just a "guinea pig" in her heart, Gray Yuan Wai would probably ignore it and say hello, and then return to the laboratory with the coffee she had brewed.

But now it's different.

Seeing that Conan was also at Dr. Asasa's house, Gray Yuan Ai immediately took the initiative to come up and talk:

"How is Lin now?"

"Is the woman still with him?"

Since Belmode's return, Lin Xinyi has completely severed contact with Gray Yuanai.

In the past three days, she can only rely on private communication with Conan and Mao Lilan to learn a little about her boyfriend's situation.

"Uhh

"Xiaolan doesn't dare to show me up now, and I haven't had a chance to see him in the past two days."

"But listen to Xiaolan, wherever Lin Xinyi goes now, that Belmode will follow."

"She has been participating in Lin Xinyi's work in the identification class as a 'girlfriend' for the past few days, and it seems that she is preparing to live in Lin Xinyi's house permanently, and she will not leave for the time being."

Gray Plains: "......"

The cold wind on her little face was blowing, and the hot coffee in her hand was about to freeze.

"A lot of people who are still pretending to be students' girlfriends... It's shameless. ”

Gray Yuan Wai subconsciously made an extremely vicious evaluation in his heart.

But at this moment, she was more worried in her heart:

Why hasn't Belmode been leaving?

And he just stayed by Lin Xinyi's side and didn't do anything else?

It's simply not worried about Lin Xinyi's psychological state...

Or did this woman find something wrong with Lin Xinyi, so she stayed by his side and secretly observed?

Gray Plains' thoughts were a little heavy.

And at this moment...

The sound of glass breaking suddenly came from the direction of the entrance.

I don't know who threw a stone from outside the courtyard wall and smashed the glass on the door of Dr. Agasa's house.

"Who?!"

Dr. Asa couldn't help but put down what he was doing and hurried to the entrance.

He pushed open the smashed door, trying to poke his head out to see who was playing a prank on his doorstep.

And as soon as this door opens...

But he saw a mysterious person wearing a motorcycle helmet and riding on a motorcycle on the road outside the courtyard gate...

Holding a small crossbow, it was pointed straight at his chest.

"This!" Dr. Asasa felt bad.

He hurriedly turned around, trying to retreat back into his house and close the door.

But the mysterious man had already pulled the trigger and fired the bolt.

"Ahh A scream.

The bolt stabbed deep into Dr. Asasa's ass, causing him to fall to the ground in pain.

"Dr. Asasa!"

Conan and Gray Plains hurriedly ran up to check on the situation.

"I-I'm fine," Dr. Asasa replied, panting.

He subconsciously wanted to turn his head again to see if the murderer who had attacked him was still outside.

At this time, the roar of the engine was already heard outside the door.

The murderer shot an arrow and stopped lingering, and rode away decisively on his motorcycle.

"Damn!"

Conan subconsciously carried out the solar skateboard, trying to catch up with the murderer who had already fled on his motorcycle.

Because he knew in his heart that according to the murderer's simple and crude way of committing the crime... If you let him escape from the scene of the crime, it will be difficult to find him in the vast sea of people later.

So he instinctively wanted to go after the murderer himself.

But just as Conan was about to leave with his skateboard...

He saw the house across the road, and suddenly opened the window to this side.

"Oh no," Conan stopped abruptly, "what just happened seems to have been seen by the neighbors." ”

"W-What do you mean?"

Dr. Asasa was still a little unresponsive.

"Neighbors will definitely call the police, and the police will come here soon to investigate."

"In other words, that woman will soon follow Lin Xinyi and come to your house."

A thin layer of sweat broke out on Conan's forehead.

He took out his phone and called an ambulance for Dr. Asasa, then hurriedly turned around and rushed into the house:

"Gray Plains! Hurry, hurry up and hide all the drug research materials of the doctor's family! ”

"If that woman finds out, the situation will be in trouble."