Dial M for Murder Piercing lens
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Tony Wendice: What makes you think he came in by this door?
Chief Insp. Hubbard: His shoes.
Tony Wendice: His shoes?
Chief Insp. Hubbard: The ground was soaking wet last night. If he'd come in by the garden, he'd have left mud all over the carpet. As it is, he didn't leave any marks at all, because he wiped his shoes on the front doormat.
Tony Wendice: How can you tell?
Chief Insp. Hubbard: It's a fairly new mat, and some of its fibers came off on his shoes.
Tony Wendice: Oh, but surely...
Chief Insp. Hubbard: And there was a small tar stain on the mat, and some of the fibers show that as well. There is no question about it.
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Chief Insp. Hubbard: There is evidence however that he was blackmailing you.
Tony Wendice: Blackmail?
Mark Halliday: Yes, I'm afraid it's true, Tony.
Chief Insp. Hubbard: And you suggest that he came in by the window. And we know that he came in by that door.
Margot Mary Wendice: But he can't have come in that way. That door was locked. And there are only two keys. My husband had his with him, and mine was in my handbag. Here.
Chief Insp. Hubbard: You could have let him in.