"What are real diamonds, are you sure?" Mizuma confirmed with a very serious look like Kumanbu Kato.

"That...... I'm not sure, absolutely not, but the analysts in the lab should be sure ......," Kumanbu Kato joked, who didn't understand the situation.

"You dare to play a poor mouth!" Mizuma Moon was really a little angry.

But basically, since the diamond is real, then the ring must be real...... Otherwise, it becomes a legend that the ring has a deep effect, so someone replaces a ring with a real diamond.

If this kind of thing really happens, it is also at a level beyond the control of the Tokyo Metropolitan Police Department, and the people of Mizuma Moon Mizuma Moon now only need to default to the genuine ring, and then find the murderer.

So why does the ring have a reversed belt? Conan would not lie to himself, as long as the deceased is a very neurotic person, he will not notice that the ring is reversed, and the ring is so expensive, it is impossible not to look at it from time to time.

Mizuma Moon thought of a possibility, to be precise, it should have been thought of at this time......

Secret Room Technique!

"Death's last words!" a ghost screamed from the ground.

Mizuma Tsuki glanced at Moriya, who was shouting and screaming, and turned to Shiratori: "Have those people finished asking?" Shiratori is generally responsible for learning about the situation at the scene from the relevant personnel, so just now he came over and either finished asking or there was a problem, and seeing Shiratori's unhurried and unhurried expression should be the latter.

"This is the result of inquiries from the people involved in the case. Sure enough, Shiratori handed Mizuma a stack of reports.

The woman among the three was named Haruei Anabuki, and she was the editor of the magazine in which the deceased's works were published.

One of the other two is called Kakuji Ideshima, a columnist, and the other is a photographer, called Wataru Tarumui.

The reason why they are here with Mori Kogoro is because today there is a symposium between Detective Mori Kogoro and the famous mystery writer Mashiki Moroguchi, and this meeting will be recorded in a magazine. (Let all the mouths benefit the noble name and be righteous, and close the publication for one issue.) Since the two-person symposium was scheduled to be held at six o'clock, the people who didn't want to go out early in the morning chose to stay in Zhukouyi's house a day earlier.

It was probably because he heard Conan's words that Shiratori also asked them about the ring.

The ring is a huge ring that was customized after the debut work reached 100 pieces, and it was called a huge ring that was customized, and Maori Kogoro also mentioned that Morukou Yoshiki once said that if it weren't for the fact that the size of the ring should not be too much, he would have planned to set a hundred diamonds.

And everyone confirmed that the deceased liked this precious ring very much, and from time to time he would rub a thing or two, and it was the kind of nervousness that would be seen in the book without an inconsistency in the font size, and then he would be furious.

Regarding the alibi, it is tentatively believed that the time of the deceased's death was around 5 o'clock in the morning, when the Mori family did not get up, Haruei Anabuki was sorting out the manuscripts of the other writers in charge, Kakuji Dejima was repairing the broken tape recorder, and Wataru Tarumi was the negative taken before sorting it out.

Among the three people, Mizuma Moon is most concerned about the female editor Haruei Abubuki, because according to common sense, if you want the other party to drink the coffee given by someone unguarded, the possibility of the opposite sex is greater.

"Huh?" Mizuma Tsuki, who had finished reading the information, was about to return it to Shiratori, when he suddenly felt that there was something a little interesting. The ages of the three men were found to be similar, Tarumi Wataru and Haruei Anabuki were thirty-three years old, while Kakuji Dejima was one year older, thirty-four.

"Please ask them if they are familiar with each other, and they seem to be very close in age, maybe they are college classmates or something. Mizuma commanded.

After Shiratori left, it didn't take long for another bad news to come from another direction, that is, there were no suspicious fingerprints on the ring, no suspicious fingerprints on the key, and no fingerprints on the coffee cup.

This proves one of the many hypotheses that have been put forward, that it is highly unlikely that the deceased would have been poisoned by giving the poisoned coffee to the deceased and then leaving and waiting until the deceased himself had locked the door and tasted the coffee. Because the murderer wiped the cup carefully after the deceased's death, no fingerprints could be found.

Mizuma took a look at Moriya, who was still making a fuss, and walked over: "What are you doing?"

"This must be the last words of death!" said Moriya, pointing to the deceased's hand.

Mizuma looked at the deceased's hand for a long time before she realized that Moriya was talking about bringing the key in the palm of her hand and the upside-down ring.

"How?" asked Mizuma.

"The posture of the deceased is very strange, so it must be when he is dying and wants to reveal some news to the person who found the body. Mori also said matter-of-factly.

"So, what news do you reveal?" Mizuma Tsuki's face was unkind, and Mori also felt that he was to the point.

"Hmm...... I don't know yet, maybe I want to reveal that I committed suicide, don't involve others?" said Moriya after thinking hard.

"I think...... You better give me the autopsy first, and then you can figure it out......" Mizuma Yue was a little helpless, it's a good thing that there is a person under him who likes to use his brain, but this person is a forensic doctor, and it's not quite right if he doesn't do his job well.

Contrary to Moriya's thoughts, Mizuma felt that these strange things should be related to the secret room technique.

The secret room, the key, the small window, and the ring connected the key things together, and Mizuma remembered a case that she had handled before.

It was the day when Ashbara first appeared in his sight, and the deceased was a professor at Nanyang University named Masashi Hirota.

It was a secret room case, and the only key was pressed under a notebook in the room.

The murderer was a student of the professor, in fact, in the process of solving the case, he did not detect his methods at that time, but found a cassette tape for a telephone answering machine in the backyard of the room, the tape was crumpled and obviously pulled, and the student's fingerprints were identified on it.

In a later confession, the student explained his own method, to the effect that he pulled out the tape, passed it through the key, and then fixed it into a structure that could not withstand strong pulling, and then called the answering machine and asked the answering machine to help him pull the key back.

Speaking of which, there was also a cameo appearance in that case of vodka to buy insurance, as well as a floppy disk containing ATPX, which was later handed over to Wei Xinghu's Interpol for analysis, and Shui Jianyue copied a copy of the reference for Gray Yuanai's antidote research work.

And using that case as a reference, Mizuma Yue quickly remembered that one of the three suspects had a tape recorder in his hand, and if that thing was used to roll tapes, it was more convenient than an answering machine, at least there was no need to call inside.

Then from outside the narrow window, use the videotape to build a slideway to send the key in, and then collect the tape and leave, which constituted a roughly such modus operandi in the mind of Mizumazuki, as for the ring, it should have played the role of fixing the strap before it was taken off and brought back, and the result was not careful enough to bring the ring upside down.

If there's any evidence to support this idea, the truncated bloodstain on the underside of the ring should match the tape.

As for how the blood stain came from, the honest working Moriya coroner finally gave an answer.

There was a wound on the deceased's cheek that had been cut by a razor blade that had not yet healed completely, and it was estimated that the time should not have been long before death, and it should have been scratched by shaving from the position.

In this way, the deceased got up in the morning and hurriedly shaved his beard in order to pay attention to his image at the symposium, but accidentally scratched his cheeks, hurriedly wiped a handful and wiped his hands with a ring, and walked out of the bathroom after confirming that there was no more bleeding.

Then someone was already waiting for him in his room, still holding a cup of coffee brewed in his room, and handed it to him along with a compliment or blessing.

As mentioned in the information, Zhukou Yigui likes to drink coffee as if he is caffeine dependent, no matter whether it is hot or cold or what kind of taste he wants.

After drinking the added coffee, the deceased collapsed on the bed, and the murderer calmly picked up the coffee cup to wipe off his fingerprints, then put on gloves, found the key on the deceased, and began to set up the scene......

Now that the murderer and methods have been identified, it is easy for Mizuma Moon to find evidence.

"The police department, asked, they were just friends who graduated from different universities at the same time and then went to work in a publishing house, but in fact, they also had a friend who committed suicide two years ago while working as an assistant to the deceased. "Shiratori is back.

Shui Jianyue smiled faintly, and now even the motive for the crime was complete.

"I'm running to call Kakuji Dejima. Mizuma said that the case could now be declared closed, he assured.

Naturally, there is nothing to say later, if it is mentioned in passing, the motive for the crime is actually to avenge the friend who committed suicide two years ago, because the reason why he was 'treated' as a suicide was actually asked by Zhu Yigui to test the feasibility of the modus operandi he just came up with.

………………

Coming back early, Mizuma ran into the office in a hurry and found his phone on Nakamura Yan's desk - his office was closest to the door, so it was his desk that was photographed at the time.

It didn't look like anyone had touched it, and Mizuma was relieved.

When he walked over to pick up his phone, Mizuma accidentally kicked the stool.

Mizumatsuki stood still, and her expression of relief was very stiff.

After trying a few more times, each time kicking the stool, Mizuma had to admit the reality: something was wrong.

Nakamura Yan's stool doesn't swing around, whether it's in or out of the stool, it's placed in a fixed position in a regular manner, so Mizuma Moon was surprised.

After all, when I slapped the table in the morning, there was absolutely no kicking the stool or bypassing the table, which is to say, Mizumazuki's mobile phone......

It was moved.

……

"Hachi-Hachi-" Mizuma Moon almost ran to a series.

Because of the moved phone, Mizuma Moon turned it on and saw in despair that a new text message had been read.

The text message seemed to be from Belmode, and it said, "The sniper mission is under your command, and the original plan will not be changed."

。 If someone sees it...... No, the question now is who has seen it.

The difference between the first series and the second and third departments is not the executive department, but the positioning similar to logistics support, file registration, archiving, entry, and the transfer of equipment, etc., are all under the control of the unified department, so the water between the moon came and secretly found the head of the first department, Kong Wuming.

"Isn't this the head of the second department, is there something wrong?" said Fujikong Takeaki, who looked very hospitable, greeted with a smile.

However, Mizuma Yue felt that this guy's voice felt like there were thorns in it, which was unpleasant.

"It's not a big deal, I'm going to check the monitor at the door of the second department's office first, the second department seems to have lost something today. Mizuma Tsuki snorted ambiguously, thinking about when he had offended this person who had nothing to do with all tasks.

"What should I do? No problem, I'll do a registration and check it casually. Fujikong Takeaki said very generously.

"It's not a big deal, so it's exempt from registration. Mizuma was reluctant.

Fujikong Takeaki seemed to be in good spirits all of a sudden: "Do you want to investigate privately? Let me help you investigate your colleagues?"

Mizuma Yue didn't dare to take this conversation, it was very taboo to check colleagues privately, and if someone else knew, it would make a big fuss.

"How can it be so serious, it's just that the things that are lost are not important or even uncertain, how dare you go online like this. Mizumayue discussed with a smile: "For the sake of the friendship over the years, just help me check it, not to mention that it is still the door of my own office." ”

"We don't have a good relationship. Fujikong Takeaki immediately said: "And the office you were in at that time was not your own office, so you are not qualified to check the surveillance casually." ”

"Be accommodating, don't let me be so embarrassed, okay? I forgot to lock the door and lost something when I went to the police, and it would be difficult for me as the head of the department to do it!" Mizuma put his arm on Fujikong Takeaki, trying to close the distance.

"It's a matter of no way!" Fujikong Takeaki didn't know why he was full of malice towards Mizumatsuki, and slapped Mizumatsuki's arm away.

"Help, I'll have you a drink in the evening. Mizuma Moon is still talking.

Fujikong Takeaki thought about it and made a three, which means asking for three drinks.

"Three bottles, no problem?" said Mizuma without mind.

"Get out, you can go by yourself!" Fujikong Takeaki said angrily.

"No, no, no, I was wrong, do me this favor, I will pay for the gold if you want to drink. Mizuma immediately said to him.

After begging for mercy, Fujikong Takeaki was willing to help Mizumatsuki, took him to a room, called up the picture he needed and left.

And Mizumatsuki stared at the surveillance screen, and her face gradually began to turn whiter and whiter.

Because I don't know what happened, when I was away, there were more than ten people in and out of the office of the second department, including Miwako Sato!