"The room key was pinned beneath a notebook. It really was a perfect locked room—there was no way it could have been murder."
When they found the key pinned beneath a notebook inside the room, Inspector Yokomizo wore a confident expression. It proved that his deduction had been correct.
As for why it had been pinned beneath the notebook, that was because the fallen bookshelf had made the scene a mess, knocking the chess pieces and telephone onto the floor.
"No, murder is highly likely."
Yet the moment he finished speaking, Xu Yue disproved him.
Inspector Yokomizo might have argued with anyone else, but since it was Xu Yue who had spoken, he could only stand there awkwardly before humbly asking, "Why do you say that?"
"Isn't it obvious? The telephone fell to the floor, yet the receiver did not fall and was still properly hung up. Although a book was deliberately placed over it to conceal it, it's far too obvious. The murder method probably has something to do with this telephone."
Xu Yue pointed at the telephone on the floor. He lifted the notebook covering it and, upon discovering that it was an integrated telephone with a recording cassette, a look of realization appeared on his face.
"Oh, I already know how the locked room trick worked."
As soon as Xu Yue said that, Conan felt somewhat numb. He had only just begun to sort out the clues, yet this guy was already about to solve the case?
Though he was reluctant to admit it, the other man really was better at deduction!
Conan had gradually grown accustomed to it and become numb, but this was Haibara's first time seeing Xu Yue solve a case. A trace of surprise could not help appearing on her face.
She had