In Conan, people have a brain option system

"Ah sneeze——!"

Sera Masumi, who had just sat down on the chair, suddenly covered his mouth and sneezed.

"Sister Sera, do you have a cold?"

The beautiful traffic policeman Miyamoto Yumi of the Metropolitan Police Department's traffic section cast a concerned look at Sera Masumi and asked softly.

"It's impossible. My body is very strong."

Sera Masumi reached out and touched her forehead, but she didn't feel any fever.

She guessed in her mind that someone might be talking about her behind her back, but she didn't care and continued to turn her head to look at the computer screen in front of her.

"The temperature difference has changed a lot recently. Sister Sera, please remember to add more clothes in time."

Miyamoto Yumi expressed concern on the side, and then sat next to Sera Masumi.

Half a month ago, Miyamoto Yumi promised Sera Masumi to come to her home to check the national highway surveillance video of the car accident on August 23 last year.

Today is the day that Miyamoto Yumi and Sera Masumi agreed to let their future sister-in-law come to their home to check the surveillance video.

Miyamoto Yumi skillfully called up the surveillance video at the entrance to the national highway, and then said to Masumi Sera:

"This is the surveillance video of the entrance to the national highway closest to the scene of the accident."

"The car accident occurred around 8:40 p.m., and it would take about 15 minutes to get from the entrance to the crime scene based on a speed of 50km/h."

'The entrance is about 12.5 kilometers away from the crime scene...'

After Sera Masumi heard Miyamoto Yumi's description, she directly calculated the distance in her heart.

Then I heard Miyamoto Yumi continue:

"We checked all motorcycles that entered the national highway between 8:15 and 8:33, so that we can include all motorcycles with average speeds from 30km/h to 110km/h."

Hearing this, Sera Masumi nodded again, thinking that there was nothing wrong with the traffic department's investigation method.

After all, it is on a national highway, and a motorcycle traveling too fast or too slow will arouse suspicion.

The range chosen by Miyamoto Yumi is already quite large, and the murderer should have been included.

"During these 18 minutes, the number of motorcycles entering the national highway exceeded 400, and there were about 37 black motorcycles that matched Akikawa's description, and the riders were also wearing black clothes."

"Later, we used the surveillance video at the exit to eliminate 26 of the motorcycles."

"Because based on the time they take to enter and exit the national highway, it is impossible for them to have time to kill people."

"And among the last 11 motorcycles, 6 of them were traveling with friends who were riding motorcycles together."

"In other words, in the end, only five motorcycles traveled alone and had the time to commit crimes."

"Then through this period of investigation, four of the motorcycle owners were ruled out as suspects."

"Where's the last one?"

Sera Masumi asked.

"When the last car entered the national highway, its license plate was blocked by things, so the identity of the car owner cannot be confirmed so far."

"What about the exit location?"

"This is the strangest thing about this. We compared the surveillance cameras at several exits and could not find the motorcycle."

Miyamoto Yumi said.

"Um?"

Listening to Miyamoto Yumi's words, Sera Masumi felt something was wrong in her heart.

Miyamoto Yumi called up the video of that section and pointed out the motorcycle to Masumi Sera.

Since the camera was facing the entrance and the rider was wearing a motorcycle helmet, he couldn't see the other person's face clearly.

But looking at the figure, the motorcycle rider should be a woman and quite slim.

The motorcycle driven by the other party quickly passed by the entrance. At the same time, as Miyamoto Yumi said, the license plate of the motorcycle was blocked.

After Sera Masumi memorized the appearance of the motorcycle and the rider's clothes, he asked Miyamoto Yumi to switch the perspective to the exit.

Then she began to quickly browse the surveillance video.

“Really disappeared”

Masumi Sera stared at the computer screen while dragging the progress bar.

She checked the surveillance cameras at several exits several times, but could not find the slender female motorcycle rider.

"Is it possible that after the person committed the murder and fled the scene, he found an opportunity to turn around and drive out from the entrance?"

"impossible."

Miyamoto Yumi directly denied Sera Masumi's speculation.

"There will be metal guardrails and isolation strips between the forward lane and the reverse lane of the national highway. It is impossible to make a U-turn on the national highway."

"But no matter how you think about it, it's impossible for a motorcycle to disappear on a national highway out of thin air."

"Unless there was a large truck picking her up on the national highway, she hid directly in the truck after the murder, avoiding the cameras and leaving the national highway."

"However, there is absolutely no reason to go to such trouble just to kill Akikawa Kyusuke and Akikawa Ryoko, two people who have no ability to resist."

Sera Masumi muttered to herself, and then opened Google's satellite map.

After she found the national highway where the car accident occurred on the satellite map, she began to zoom in and move the map forward little by little along the route.

After dragging for about ten kilometers, Masumi Sera suddenly discovered that there was a section of the route where there was no barrier between the forward lane and the reverse lane.

"You can turn around here!"

Sera Masumi said.

Miyamoto Yumi looked over after hearing this, and then a surprised expression appeared on her face.

"Oh yes, this is the opening that allows emergency vehicles to make a U-turn in the event of an accident."

"If it's a motorcycle, you can turn around even during peak traffic hours."

Sera Masumi nodded, and then switched the perspective back to the entrance position.

"We thought the other party would definitely go out through other exits, so we ignored the motorcycle leaving from the opposite lane at the entrance."

"It is impossible for a motorcycle to disappear out of thin air. Since there is no sign of this motorcycle at other exits, it is very likely that she turned around and left from the place where she came in."

Sera Masumi said and re-checked the surveillance at the entrance.

After nearly an hour of careful investigation, Masumi Sera found the familiar figure in the surveillance video at 9:34 pm.

"Sure enough, she turned around and returned."

The license plate number on the back of the opponent's motorcycle was also blocked, but the place name and pseudonym on it were revealed——

【Hakone Town】

Although Sera Masumi could not see the complete license plate of the motorcycle, her face showed a very happy expression.

License plates in small places in Japan usually consist of place name + kana + number.

The place name represents where the vehicle was registered, while the pseudonym is random.

But 【わ】 is a pseudonym that cannot appear randomly on a license plate.

Because this is a pseudonym that can only be used on rental vehicles.

"In other words, this person rented the motorcycle in Hakone."

Hakone is not a big city, and there are very few shops where you can rent motorcycles.

Masumi Sera searched the Internet and found that there were only two shops in Hakone that could rent motorcycles.

The Metropolitan Police Department had not been able to pinpoint the last motorcyclist for a long time. It only took Masumi Sera more than three hours to grasp the clues.

"Thank you, Sister Miyamoto."

Sera Masumi stood up excitedly and walked directly towards the door.

"Hey, wait, sister Sera, where are you going?"

Miyamoto Yumi shouted towards Sera Masumi.

At this moment, Sera Masumi had already opened the door. She leaned half back and smiled at Miyamoto Yumi:

"Hakone."