"Uncle, you really don't know?" Kōyū was not at all surprised that Mōyū denied it.
"Alright, little one, he won't tell." Officer Gong Chang put the plastic bag containing the Guan Yu keychain into his inner pocket.
He then looked at Akira Morozumi and said, "You heard what Genda and Soga were saying on the phone, didn't you?"
"It's the bugging device you just removed from the phone's backplate..."
"You heard them say that visiting a nearby house that day would bring good luck, so you decided on the date for the arson."
"If I had sneaked into his house that day and secretly switched the lucky cat keychains he was going to give out to the neighborhood residents with Red Hare keychains..."
"So when Genda finds that the keychains he gave away are not designed correctly, he will come to collect them."
“It’s normal that the local residents would find his behavior strange.”
"Since it happens to be the day Ms. Ryoko hired a detective to investigate, if all goes well, it will also leave an impression of Genda on the detective."
As if he had figured out how to exonerate himself, Morokazu Akira spoke with more confidence.
"Please wait a moment. The house was set on fire after 7:30, right?"
“I went out drinking with Soga before 7:30, and Soga has proven that before.”
"Or are you saying that the kid next door who testified about the time of the arson was lying?"
After hearing this, Kōyū's gaze shifted from Akira Morozumi to the desk lamp behind him, and he couldn't help but chuckle.
Then Kōyū asked Mōki Akira, "Uncle, there are so many newspapers under the lamp behind you, and the lamp bulb is wrapped in a tissue with a match inside."
What are you trying to do?
"..." Moroko Akira turned his head and glanced at the desk lamp behind him. His face slowly turned red, but he didn't say anything.
"Let me explain."
After glancing at Kōyū, who had given him the first hint, Hattori Heiji looked at Morozumi Akira and said, "The surface temperature of a 100-watt light bulb is 218 degrees Celsius."
"Wrap a tissue around that thing and stick a match in it, Mr. Morozumi, I'm sure you know what will happen, right?"
After hearing this, Zhu Jiaoming remained silent, but his expression grew increasingly grim.
His tightly closed eyes and clenched fists revealed that he was suppressing his inner emotions.
"So this is the time-limited ignition device," Hattori Heiji said calmly. "You just wanted to set fire to your own house while you and Mr. Soga were out drinking."
"You tampered with the light bulbs in the warehouse, spilled lamp oil on the floor, and then put the red horse in the crack of the window."
"Before you go out for drinks, turn on the light. That way, the match will light in about ten minutes."
"The paper towels burned and fell on the floor, causing a fire, and at the same time, the neighbor's child thought that the arsonist had put the horse next to the window at that moment."
"Oh, I see." Kōyū pretended to suddenly understand and said, "Uncle, you just want to burn down Mr. Genda's house using the same method to destroy the traces of you sneaking in, right?"
"Actually...we have other evidence." Seeing that Zhu Jiaoming had not yet admitted it, Officer Gong Chang decided to bring out the trump card.
Reaching into his inner pocket, Officer Gong took out a sealed plastic bag, glanced at it, and muttered to himself, "Wrong one..."
Akira Morozuki, who was not far away, did not hear it, but Heiji Hattori and Mitsuyuki, who were next to Officer Yumikaze, heard it clearly.
The two muttered to themselves, "They took the wrong one, okay...?"
Fortunately, it didn't cause any problems, and Officer Yukichi didn't show any embarrassment. He then took out another sealed plastic bag from his inner pocket and showed it to Morozuka Akira.
"That's the base of the keychain with the name of Red Hare printed on it that Ms. Ryoko was holding in her hand before she died."
Upon seeing the base, Akira Morozuki's face immediately showed a look of panic.
"It matches the cut on the red horse's leg at the scene of the fire in 3-chome. Now all that's left is to compare the fingerprints attached to it with yours."
After Officer Yumikado said those words, Mitsuhiro clearly saw Akira Morozumi loosen his fists, which had been clenched tightly since earlier.
Faced with fingerprints, all his words would become pale and powerless.
"The reason you cut off the base and Guan Yu is probably because you were worried that the horse might be made by Mr. Genda if it were discovered."
"Then he will most likely be arrested by the police before you kill Ms. Ryoko. However, Ms. Ryoko seems to have already realized what you have done."
"Ms. Ryoko wants the detective to investigate the 'suspicious figures around the house at night,' which is probably the figure you were in the experimental device."
"After hiring a detective, she discovered that the person was you. She checked the things in your room and found the red horse and the base, which confirmed that you were the serial arsonist."
At first, Hattori Heiji couldn't understand why Morozumi Ryoko would suddenly cancel the request, saying that she had been acting a bit neurotic lately.
But now he understands completely.
It's nothing more than Ryoko Morozumi trying to use these pieces of evidence to blackmail Akira Morozumi into divorcing her.
Conan and Kousuke share the same thoughts, but Kousuke's thinking goes a little deeper; Ryoko Morozumi may want more than just a divorce.
They also wanted to get Moroko Akira to leave the house.
Their guess was confirmed by Akira Morozumi.
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