"The time when multiple people saw Father lasted only until last night. After this morning, the only one claiming to have seen Father was Sister-in-law Natsuhi Ushiromiya. Then, the receipt I tucked into the door revealed a curious fact. So, what kind of line can be drawn between these two points?"
Eva Ushiromiya guided everyone present to imagine it. That receipt could indeed be treated as one point. But they did not know what other point it should be connected to, or what sort of line it would form.
It was not difficult to figure out the answer Eva Ushiromiya expected. She wanted to prove that her spur-of-the-moment action had exposed Natsuhi Ushiromiya's lie this morning about Grandfather being in his room.
"What nonsense. Why would my mother lie? What reason would she have to lie?"
"I'd like to know what reason she had too. But, Jessica, pretending Father was in his room might not have been meaningless, you know? Don't mystery novels occasionally use tricks like that? They make people misjudge the time of death, then use that to establish an alibi."
"What are you talking about? I've never heard of anything like that."
"Although we haven't found Father yet, going by common sense, shouldn't we assume he has already been murdered? If so, we'll probably find the body soon. And if we can mislead everyone about the time of death, Sister-in-law Natsuhi Ushiromiya can establish an alibi. Do you understand what I mean?" In other words, when Natsuhi Ushiromiya claimed this morning that Kinzō Ushiromiya was in his room, she had actually been lying, and Kinzō Ushiromiya had already been dead? Then she could move Kinzō Ushiromiya's body somewhere else and make it look as though he had only just been killed.
Then Lin Yan could stay with