Dorothy: The hotel security chief cordoned off the room, so the only people who saw the room after the murder, other than you and your staff, were the waiter, the security chief, and the four of us.
Alvarez: So?
Dorothy: So when Miss MacGlinn was reconstructing the murder scene, she described Blanche's dress being slung over the bed.
Alvarez: It was. I saw it.
Dorothy: But Miss MacGlinn could only have seen it if she'd been there prior to the murder. [Blanche gasps] I think I see now how it happened. Last evening, at dinner, when Miss MacGlinn saw Blanche give Kendall Nesbitt her key, she was furious. She dropped a steak knife into her purse.
Sophia: Big deal, I took a whole place setting.
Dorothy: Not now, Ma! And when she felt that she wouldn't be missed, she slipped out of the dining room and headed upstairs. Kendall had let himself into Blanche's room while she was in the shower and was making himself comfortable when there was a knock at the door. Thinking it was the champagne, he opened the door.
Posey was there. She accused him of two-timing. He denied it. Posey pulled out a steak knife, plunged it into his chest and left the room before Blanche could discover her. Jealous rage was the motive, all right, but Blanche wasn't the murderer. There's your murderer, Posey MacGlinn.