"The deceased's name is Reina Natsukawa, 28 years old, the manager of this 'rice cake shop', and the cause of death seems to be a skull fracture caused by hitting the corner of the table with her head."

The police soon arrived at the scene, led by Officer Twilight, and after breaking open the door of the baking room, Officer Wataru Takagi reported the results of the forensic officer's inspection to Officer Twilight.

"Moreover, both doors of this room were locked from the inside of the room, and both were bolted. The only window that opens, and because of the cake......"

"Cake?"

Something strange, Officer Twilight asked.

"To put it simply, this inward-facing window has a row of cakes on the windowsill on the inside, and the cakes are higher than the lower edge of the window."

Gao Yuan stepped forward and explained, "If someone leaves through the window, then when the window is opened, it will inevitably touch the cake. And if you go out of the window first, you won't be able to put the cake on the windowsill with the window closed. In other words, no one could get out of the window, and this room was a very complete secret room. ”

"Yes."

After listening to Takato's words, Officer Twilight thought, "The scene is a secret room, and no one can leave the scene. In other words, the deceased must have accidentally slipped in the house and hit his head to cause death...... It was supposed to be an accident. ”

As he spoke, Officer Twilight looked at Gao Yuan:

"In that case, wise brother, I don't need you to go out this time."

"How could it be ......?"

Hearing Officer Twilight say this, Moriran and Suzuki Sonoko, who were on the side, had some difficulty accepting this reality.

At this time, Gao Yuan didn't care about Officer Twilight's statement, but turned his attention to the row of cakes in front of the window.

I saw the row of cakes on the windowsill, in addition to the more distinctive, the store's signature popcorn cake, there are also some ordinary cakes.

But what is even more special is that the cakes are evenly placed on the windowsill: in front of the window on the left, there are ordinary cakes, and in front of the window on the right, there are popcorn cakes.

The so-called popcorn cake is in the middle of the two layers of cake, with popcorn as a filling, and at the same time, some popcorn is sprinkled on the top layer of the cake.

Looking at these popcorn cakes wrapped in plastic film underneath, and the raw corn that has not yet burst can be seen in the popcorn visible to the naked eye, Gao Yuan smiled thoughtfully-

Secret room? I've unraveled the tricks of this secret room! However, the question now is, how to prove that this is a murder by a murderer? After all, the situation at the scene, there is no evidence that the deceased died of murder, and it is completely reasonable to say that it was an accident.

Thinking of this, Gao Yuan got up, looked in the cake shop, walked out of the store again, looked for the nearby surveillance, and then returned to the store and explained to Officer Twilight:

"Officer Twilight, when did the deceased die?"

Hearing this, Officer Twilight glanced at Wataru Takagi, who immediately replied, "Probably...... Two hours ago. ”

"Then, Officer Twilight, you can send someone to fetch the surveillance on the road outside the store to see who entered the store during the time when the deceased died. Miss Natsukawa's death and the possibility of being murdered again. ”

Gao Yuan said.

"Huh? However, this scene is a secret room......"

Officer Twilight said in surprise.

"The mystery of the Chamber of Secrets is simple."

Gao Yuan said, "It's an unlocked window. ”

Hearing this, Officer Twilight walked to the window and asked, "But, wise brother, you just said that because of the cake on the windowsill, no one can leave the house!" ”

"Officer Twilight."

Gao Yuan said, "The trick is on those popcorn cakes. Because the popcorn on it was still in the state of raw corn before the murderer left, the height of these cakes in front of the window on the right was not higher than the lower edge of the window, so the window could be opened. ”

"But, now, it's popcorn on it?"

Officer Twilight wondered, "Could it be that after the murderer left the house, he could still turn the raw corn in the house into popcorn?" ”

"It's just possible."

Gao Yuan said, "It's not impossible to heat corn through glass outside the house...... For example, with microwaves, or lasers, you can do it. Of course, I'm personally inclined to microwave. ”

"Micro ...... Microwave? ”

Hearing this, Officer Twilight said in surprise.

"Could it be a microwave oven?"

"I remember the 'popping corn' that I could buy in the supermarket and was used to make popcorn, and it only took about three minutes to heat it in the microwave to turn it into popcorn...... But how? ”

"The principle of microwave oven heating food is to use microwaves to vibrate the water molecules in the food, so that the food and water generate heat. Microwaves, on the other hand, are electromagnetic waves, and it is very simple to penetrate glass. Therefore, as long as there is a special microwave emitter, it is not difficult to heat corn through glass. ”

Gao Yuan said, looking at Officer Twilight:

"Of course, that's my assumption. It's just that judging from the situation at the scene, the popcorn on these popcorn cakes is not completely popped, and a lot of raw corn can be seen on it. If the quality of the popcorn cake is the specialty of this shop, I don't think this cake will become a popular product that requires a reservation to buy. Therefore, I have reason to believe that these cakes were reluctantly popped by other people who had no choice but to burst the corn on top...... All in all, there are flaws in the methods of the secret room, which shows that there is a possibility of outsiders committing crimes. ”

"Yes, that makes sense."

Officer Twilight nodded, and instructed the officers next to him to call up the roadside surveillance to find out if anyone had entered the store during the time period when the deceased died.

Soon, according to Gao Yuan's thinking, the police locked up a suspect, and when the secret room technique had been cracked, the police quickly broke through the other party's psychological defense and found the microwave transmitter he made, but all this had nothing to do with Gao Yuan.

On the way home, Suzuki Sonoko had already said goodbye, while Moriran followed Takato with a heavy heart, walked to the 2-chome of Rice Flower Town, and stopped in front of the Kudo house, which was not unlit.

"Na...... Mr. Wise. ”

With a somewhat heavy tone, Mao Lilan spoke.

"What's wrong? Maori classmates? ”

As he walked to the door of his house, hearing Mao Lilan say this, Gao Yuan couldn't help but turn his head and ask.

"He hasn't been to school for almost two weeks."

Mao Lilan said a little sadly, "You know, where did Shinichi go?" ”

"I don't know."

Gao Yuan said.

"Yes."

Lost, Mao Lilan looked at the villa called Kudo House in front of him, speechless and choked -

"Mr. Wise, if one day, Shinichi comes home, or contacts you, you must tell me!"

After saying that, Maolilan left lonely.

Looking at the back of Mao Lilan leaving, Gao Yuan couldn't help but sigh, walked to the door of Kudo's house, looked at the iron door a little, and hurriedly ran to Dr. Asasa next to it—who is it? Who has been in these days!