Sergeant Trotter is investigating the murder of former magistrate
Trotter: (without turning his head) Just a minute, please.
Miss Casewell: (pausing at stairs) Were you speaking to me?
Trotter: (rising) Katherine …? (He stands over her.) What the hell are you doing here?
Miss Casewell: I … Oh God … (She rises, moves centre, and drops on sofa. She cries, rocking herself to and fro.) I wish to God I’d never come here.
Christie, Agatha. The Mousetrap. Samuel French, 1982, pp 82-85