"Was it an accident?" Later, after some investigation by the police, the officer who manages the area came to a conclusion.

"I don't know yet, but there's a high chance of accidental death.\" The officer with a coral head replied to the doctor.

\"Officer Yokogou, it seems that the cause of death was because of this ornament.Maybe he accidentally touched it when he fell.\" An forensic officer picked up the ornament next to the deceased.

\"That's exactly what happened.\" Yokozo said in a tone that was sure to be so.

\"Did he fall on his own?\" The doctor asked, looking at Yokozo.

\"The thing is, it is very likely that the dead Hirota Masashi wanted to take something off the shelf, so he stepped on the bookshelf and lost his balance, and then the whole bookshelf fell down, and the ornament that fell on the ground hit the back of his head, and so the accident happened.The best evidence is that the doors and windows of this room are locked, and the only key to this room is under these scattered books.\" Yokozo reasoned as he replied to the doctor, and then stepped aside, Pick up the book you just said, revealing the key that was pressed underneath.

\"So, was it an accident?\" The doctor asked at Yokomi.

\"Hmm.\" Yokozo nodded.

"It's also possible that he was killed by someone else and faked as an accident.\" Conan walked over from the side, then crouched down and looked at the answering machine in front of him that was pressed against a laptop.

\"It's like... You're from Mr. Maori...\" Yokozo looked at Conan and thought for a moment.

\"By the way, he's my relative's child.\" The doctor took over.

\"See for yourself that the phone fell on the floor.\" Conan pointed to the phone in front of him that was covered by a notebook.

\"Well, in that case, the phone must have fallen along with the bookshelf.\" The doctor reasoned as he looked at his surroundings.

\"If that's the case, the receiver of the phone will definitely fall off, and looking at the phone, it's obvious that someone has turned the phone upside down and pressed the book on it to disguise.\" Xiaobai also walked to the answering machine.

\"I remember you were...\" Henggou was thinking about it again.

"My name is Maori Bai, and I'm Uncle Maori's nephew.\" Xiaobai introduced himself to Yokozo.

\"Oh... Yes, I remember.\"Henggou clenched his right hand into the palm of his left hand.

\"So Mr. Maori... Mr. Maori...\" The ditch looked around.

"Well, I'm sorry about this, I'm here with these kids.\" The doctor picked up.

\"Uh... So, what are you doing here?\" Henggou's expression was a little lost, but he recovered after a while, looked at the doctor and asked.

\"I sent it to Professor Hirota because a friend accidentally sent it to Professor Hirota by mistake, and I just came here to get the floppy disk back. I think it must be right next to the computer...\" Dr. replied to Yokomi, pointing to the computer desk.

\"The floppy disks are all gone.\" The people who looked at the computer desk were stunned, and Gray Yuan, who was tapping on the keyboard in front of the computer, said.

\"Huh?\" Hearing Ashbara's answer, the Doctor was stunned.

\"In this case, all the data on the computer may have been deleted.\" Gray Yuan continued to check the computer.

"Who is this little girl?\" Henggou stared at the doctor with wide eyes.

\"Ahh She's also the child of one of my relatives.Okay, Xiao Ai, don't touch that.\" The doctor replied while touching the back of his head as he ran to the computer desk and hugged Xiao Ai.

\"But from what this kid just said, this incident is likely to be a murder case.And according to the environment of the crime scene, this is a secret room...\" Watching the doctor take Gray Yuan down, Yokogou moved his gaze to Conan and Xiaobai, while thinking back to what he had just said.

"The Chamber of Secrets...\" the doctor exclaimed.

\"Murder?\" Mrs. Hirota was also stunned.

\"That's right.\" Yokozo nodded affirmatively, then looked at the doctor.

"Well, I have nothing to do with this case, there's no way anyone in the world can bring a child to kill a fool.\" The doctor explained to Yokozo.

"Hmm... It's too.\" Yokogou nodded in thought.

\"Who killed my husband?Who killed my husband?\" Mrs. Hirota asked Yokozo as if she had woken up from Yokomizo's words.

"Madam, calm down first, are there any suspicious characters coming to see your husband tonight?" asked Yokozo while calming Mrs. Hirota's emotions.

\"If you count Dr. Asasa there, there are probably three or four more people who have been there.\" Mrs. Hirota replied, then pointed to the doctor.

\"Do you have an image of the three or four people?\" Yokozo asked Mrs. Hirota.

"I don't have much of an image of those guys, because I went out with my wife next door from 8 o'clock to 11 o'clock and didn't come back until 11 o'clock.\" Mrs. Hirota replied to Yokomizo.

\"Well, madam, you didn't see any guests coming to your husband tonight.\" Yokomizo muttered to himself.

"No, actually, I saw the first guest who came here.\ I was just about to go out with my wife next door, and my husband said it was one of his students, and I think he was surnamed Hosoya.\" Mrs. Hirota replied to Yokomizo.

\"Alright, you go and bring the thin arrow who was here tonight to find Professor Hirota.\" Yokozo instructed one of the officers beside him.

"Yes.\" the officer ordered, and walked out the door.

\"Do you know the names of the other guests?\" Yokozo asked Mrs. Hirota. (Although I have already asked if there is an image, but here I ask for one of the names, here is just a routine question.)

\"I just remember Mr. Asa who called me before I went out, and my husband only told me that there were two or three more students who would come to see him today.\" Mrs. Hirota lowered her head and pondered for a moment, then replied to Yokomizo.

\"Hmm... In this way, we have to check all the students of Professor Hirota.\" Yokozo touched his chin and thought.

"Ale, the light on this phone keeps flashing" Conan said as he lay on the ground and looked at the answering machine.

\"Huh?\" Henggou looked at Conan.

\"This should be called an answering machine, right?\If you listen to it, you might know something.\" Conan said, looking at Yokomi.

\"Oh... That's right.\" Henggou nodded.

......

\"There are 13 messages in total.\"Take out the answering machine and listen to the message.

\"13,There's really a lot of messages.\" Listening to the sound of the phone, Henggou muttered to himself.

\"Hey, I'm Professor Shirakura Hirota, we've made an appointment for tonight, right?\" A message came from the phone.

\"Who is this Mr. Shirakura?\" Yokozo looked at Mrs. Hirota not far behind him.

\"I've seen Mr. Shirakura's words before, he's still very young.\" Mrs. Hirota replied to Yokomizo.

\"...\" Waiting, the phone has been silent.

\"I'm Morioka, what time should I go over tonight?\" After a while, another message came out.

"What about this?" Yokozo looked at Mrs. Hirota behind him.

\"I also know Mr. Morioka.It seems that my husband's earliest student used to come to our house to play.\" Mrs. Hirota replied to Yokomizo.

"Then do you know the addresses and telephone numbers of Mr. Shirakura and Mr. Morioka?\" Yokozo asked Mrs. Hirota.

\"Yes.\" Mrs. Hirota nodded.

\"That,I'm Shirakura, what's going on?\" A young man in a white coat walked in from outside the door.

"I don't know who killed Professor Hirota today.\" Yokozo replied as he looked at the man who called himself Shirakura

\"Huh?\" Shirakura heard Yokozo's answer, as if he couldn't believe it.

\"Hey, I'm Bai Cang, because I suddenly have something tomorrow, I'll go to your place now, I'll see you later.\" The voice of the answering machine came from the voice of a message again.

\"Mr. Shirakura called 10, and Mr. Morioka called 2.\" After listening to the messages on the answering machine, Yokozo sorted out the number of messages in the answering machine.

\"Mr. Shirakura, don't you think you've been talking too much?\" Yokozo asked, looking at Shirakura.

\"Didn't I say it, just because I couldn't beat the professor anymore, so I had no choice but to come here directly.\" Shirakura replied to Yokozo.

\"Forget it.\" Henggou listened to the other party's explanation, and then looked at the answering machine.

"But, how could this happen.\" Hakura still seemed to be in disbelief in his general self-talk.

\"It's the thirteenth and last message.\" Yokozo looked at the answering machine.

\"Hello, I'm from Kurojuju Insurance Company, I want to explain to you about our company's new insurance, I wonder if you can take some time to come out?\" A man's voice came from the answering machine.

\"Pull the insurance...\" Henggou muttered to himself.

As for the side, Conan and Gray Yuan, who heard the sound of the answering machine, were stunned.

\"Sure enough...\" Xiaobai heard the voice of the answering machine, and his smile was even worse.