My Partner is Shiina Mashiro

"Then the on-site investigation is roughly completed." Yukinoshita Yono breathed a sigh of relief, and asked DR Fashion, "So is the autopsy report out, Mr. Perverted Coroner?"

"Whoa!...that's bullshit, I've never experienced anything like this before!"

Speaking of the autopsy report, DR Fashion's expression collapsed.

"Finally, a corpse was placed in front of my eyes, but it was all burnt to black charcoal. I stared at it like I was staring at a pile of coal. I am a forensic doctor, not a miner!"

"...Let me sum it up." Yukinoshita Haruno weakly concluded, "You mean that because the body was burned so badly, you can hardly get any useful clues from it, right?"

"Ah, that's not the case." DR Fashion shook his head, "At least the DNA can still be extracted."

"In addition, this corpse was burned really badly. According to my years of forensic experience, this corpse burned for at least an hour."

"One hour?!" Yukinoshita Yono shouted in surprise.

"Well, that's right, Miss Yukinoshita, do you have any questions?"

According to the situation at the scene, can the fire here really burn for an hour?

Yukinoshita Yoshino didn't know much about criminal investigation, but she still had the most basic common sense.

The three elements of fire are accelerant, combustible and ignition source.Leaving aside combustibles and ignition sources, is it really possible to provide enough oxygen in such a small room to allow the burning time to last for more than an hour?

Chapter 240 IX Locking on Zhenbai's Attack

In the small room where the crime happened, the LED lights were emitting a strange red light. Anyone in this room with low visibility would feel that this dim red light is quite scary.On the floor of the room, there were still ashes of paper left over from the burning. From the results of DR's fashion test, it seemed to be the ashes of the examination paper.

The fire extinguisher was placed on the ground, and Zhenbai, who was wearing white gloves, picked it up and looked at it... It seemed that it hadn't been used at all, even the safety valve was plugged in, and there was such a big flame at the scene. It has to be said that it is quite a sad thing that Gu Hachiman did not come in handy until his death.

It seemed that something could be seen on the blackened ceiling. Upon closer inspection, it turned out to be a square hole. Obviously, it was in this basement from the beginning. Mashiro used a small flashlight to shine a light inside, and the dark hole seemed to be What else is engraved on it...

"March 19, Showa 25...What does this date mean?"

Puzzled, Zhenbai asked DR Fashion.

"Look at the meaning above, this place was secretly built by the Japanese Land Army Command in 1944." DR Fashion nodded and replied, "It seems to be the same as my previous inference, Sobu High was first established by the Gendarmerie Commander It was built on the ruined wall of the Ministry, but I didn’t expect that even this basement was a product left over from the war at that time.”

It's really thanks to the board of directors of Zongwu High School that they figured it out. This kind of ability to gather materials locally is truly remarkable.

But, don't tell the truth, even Yukinoshita Yono, who had studied at Sobu High for three years, didn't understand very well, what is this basement used for?

"This hole in the ceiling...is supposed to be used for ventilation."

Zhenbai thought carefully, and followed the method Liu Sen gave her, starting from the subtleties, and analyzing the problem from the small to the big.

"In other words, there should be a lot of people staying here, and the time they stay here won't be too short.—"

"Will this be a place to take refuge?"

Yukinoshita Haruno gave Mashiro a scrutinizing look.In her opinion, Zhenbai not only has a strong psychological quality, but also has outstanding abilities.After Liu Sen, the backbone, fell, not only did he not become disoriented, but he fully showed his side of seeing things and knowing things.

DR Fashion nodded and agreed with Zhenbai's statement, "bingo, the answer is quite correct, Xiao Zhenbai."

"At the end of World War II, the U.S. military sent bombers to support China's resistance against Japan. Chiba County, the headquarters of the Japanese army, was naturally an important target. If the army's red deer do not want to be killed by bombing, of course they must build defensive measures."

"Like this air-raid shelter, if my site survey is correct, its structure roughly looks like this."

DR Fashion took out a hand-painted drawing, and the crooked lines and blurred and rough patterns on it made Mashiro and Yukinoshita Haruno frown.

DR Fashion scratched his head embarrassingly, "As a forensic doctor, isn't it normal for you not to be able to draw? You just make do with it?"

Zhenbai didn't have anything to say, she just took out her drawing board, followed the content drawn by DR Fashion, and drew a brand new painting in less than 3 minutes.

With exquisite lines and simple colors, this painting is not only at the level of a master, but at least it is much better than the graffiti-like works of elementary school students like DR fashion.

DR fashion couldn't help clapping his hands and praised, "It's so perfect, or Xiao Zhenbai, you can hang out with me from now on."

Yukinoshita Yoshino put his fist on DR's stylish nose, "3 minutes, you know..."

"Long the sacks—I'll explain it now!"

DR fashion hastily put his finger on the top of the picture.

"Look here, the small hole you just saw is actually the entrance of the ventilation pipe connected to this small room."

"The snorkel is bent and leads to the ground, which is breathable and waterproof at the same time."

"Well, according to this, the hole in the wall should be the so-called water collection pipe?"

Yukinoshita Haruno pointed to a small hole on the wall in the painting.

"This should be the place to collect rainwater."

"Yes, that's right." DR Fashion nodded, "Not only that, but the connection between the main entrance of this small room and the corridor is still movable."

"Those sections of the walls are not welded. As long as the iron sheet is removed, this small room can be completely independent."

"If that's the case, it would be difficult to enter this room without a key."

Mashiro sent out a question while burying his head in recording the information he had collected.

"If there is only one key, you can enter the basement, but you should not be able to enter the small room, right?"

The reason Yuihama Yui and Koinu Haruichiro quarreled before was that Koinu Haruichiro suspected that Yuihama Yui had stolen his key. Judging from the key that Mashiro got from the security office and the key found on Hikigaya Hachiman at the scene, it seems that Koinu Haruichiro's suspicion is not groundless.

Although Mashiro doesn't understand why Yuigahama Yui stole the key, and why the key finally appeared in Hikigaya Hachiman's hands, but such a key is definitely not enough, because if you want to enter the scene, There is another small door.

"No, actually all you need is a key to enter this small room."

DR Fashion explained.

"According to what the security guards in the security department said, it seems that it only became like this after Haruichiro Kogu became the director of the academic affairs department."

"After becoming the director of the Academic Affairs Office, the job of getting the test papers here fell on his head. That puppy Chunichiro is not a patient person. It is a problem for him to open the door twice every time he takes the test papers. Quite a troublesome thing. Later he simply didn't lock the door of the small room... and after that he didn't even bother to bring the key of the small room."

"Doesn't that mean..." Zhenbai grasped the point of the question, "As long as you get the key to open the basement, anyone can enter this small room?"

"That's right." DR Fashion replied, "So, the door of the small room is open. As long as you can enter the basement, you can definitely enter that small room."

"That's what I said, but it's actually quite troublesome to enter this small room without a key."

"Is it troublesome?" Yukinoshita Yoshino asked with a frown, "How can you be troublesome if you don't bring the key?"

"Because according to the testimony of the security guards, that guy Haruichiro Kogu locked himself in the small room several times, so he had to call the security guards for help."

"It's really stupid to lock yourself in the room."

"That can't be helped, who made your guy so suspicious." DR Fashion replied, "That guy often closes the door of that small room subconsciously as soon as he walks into it. Trapped myself."

"And the mobile phone signal in that small room is really bad. Sometimes it takes more than ten calls to get through."

"Also, this was collected at the scene before. A lot of shards of glasses fell beside Hikigaya Hachiman's body."

"Shards of glasses?" Zhenbai found the photo that DR Fashion gave her. "Since the other parts of the glasses frame are intact after being burned, why is there a temple missing?"

Zhenbai was thinking, maybe it fell somewhere after this paragraph, but where will it fall?

"The spectacle temple is plugged in the ceiling." DR Fashion explained in a timely manner, "Although I don't know why it appeared on the ceiling, and more importantly, there is a pinhole camera at the end of the spectacle frame."

...pinhole camera?What is that again?Zhenbai felt that his little head was about to be dizzy.

Just like what DR Fashion said before, according to the degree of damage to Hikigaya Hachiman's body, the fire lasted for at least an hour... But this is very strange, the fire can't last so long at all. .

According to general logic, the fire will indeed go out shortly after burning, because there must be insufficient oxygen.

When Zhenbai and the others arrived at the scene, the door of this small room was closed. They also learned from the security guard at the security office that the airtightness of the door was quite good before it was damaged by the explosion.

According to the principle of thermal expansion and contraction, once the fire starts to burn, this small room will be like a bottle, with only one vent on the ceiling.

Anyone who has played with fire when they were young should know that if you put a burning paper in a glass bottle, it will automatically go out after a while, because the hot air will rise, and oxygen will not be able to flow into the bottle against the direction of the airflow. In the end, the flame will be extinguished due to lack of oxygen.

So if the scene has such a structure, how did the fire burn for so long?

Zhenbai couldn't figure out why the fire could burn for two hours. Now she suppressed the doubts in her heart and asked the last question about the present.

"So now there is one last question on the scene?"

The iconic interrogative declarative sentence, the speech with Zhenbai's personal style, handing the paper in the thermos cup to Yokino Yukinoshita, the handwriting on this paper, and something that Liu Sen gave to Zhenbai before he fell into a coma The handwriting is almost identical.

"This seems to be the suicide note written by Xiangcai back then, yes, I can still recognize her handwriting..."

Yukinoshita Yoshino said with some regret, it's just that after such a long time, she has already been able to face it calmly, but the only thing that puzzles her is that there are actually two copies of this suicide note?

"However, I always feel that something is wrong. Is the paper of this suicide note too new?"

"Let me take a look, let me take a look.", DR Fashion moved his head over, he was always very concerned about issues related to authentication, "It seems to be a bit new, if it is a paper that has been stored for three years, It shouldn't be like this."

"Is the paper new?"

Really puzzled, but that's not what she wanted to ask.

"No...this is not the key issue. What I am curious about is why Hanazawa Coriander's things appeared in Hiki Valley Hachiman...or in the hands of Hihama Yui? This is what I can't figure out place."

"Yang Nai, you told Sen before, what happened after Hanazawa-senpai passed away... how did you deal with the suicide note back then?"

"Originally, I planned to destroy it." Yukinoshita Yono sighed, "But after thinking about it, this is her last word in this world. Thinking about it, I really can't bear to throw it away."

"So, when the incident was exposed and I was suspended from school, I gave all of Coriander's suicide notes to Teacher Hiratsuka Shizuka. Among all the teachers, she is the most trustworthy one. I'm more at ease there."

Although I don't quite understand why Yukinoshita Yoshino gave Hanazawa Coriander's suicide note to Hiratsuka Shizu, but Mashiro feels that it is still necessary to ask Hiratsuka Shizu.

The female teacher seems to be quite trusted and popular with the students.Whether it was Ebina Himina or Hayama Hayato, even Yukinoshita Yukino once sought her out for psychological counseling.

If Mashiro's intuition is correct, that Mr. Shizuka Hiratsuka should know the real reason for Hanazawa Coriander's death that year.

"Then, let's go to Hiratsuka Shizu-sensei right now." Yukinoshita Yoshino smiled, as if he had seen through Mashiro's thoughts, "I think you must really want to know some questions. "

......

At [-]:[-] p.m. on the same day, Shizuka Hiratsuka's office in the Sobu High School Building.

Perhaps because of the information about Liu Sen's admission to the hospital, Shizuka Hiratsuka first expressed her apology when she first saw Mashiro.In her opinion, if she hadn't asked Liu Sen to investigate, this kind of incident would definitely not have happened.

Accepting Hiratsuka Shizuka's apology on behalf of Liu Sen, Mashiro's mood remained quite calm.

"Ms. Hiratsuka, Yango and I found this at the scene. After identification, it is indeed Hanazawa-senpai's suicide note. Do you know anything about this?"

Shizuka Hiratsuka took a subtle look at Mashiro. Is it really possible for a person's character and behavior to change so quickly and completely?

But Shizuka Hiratsuka also knew that now is not the time to delve into this, she thought for a while and replied.

"Hey, is this coriander's suicide note?"

After receiving the suicide note from Mashiro, Hiratsuka shook her head.

"This is not Coriander's suicide note. Coriander's suicide note is still in my drawer."