Anna Quangel is Interrogated

Two weeks into her interrogation under Escherich's successor, Inspector Laub, who slaps her with the back of his hand between questions, Anna Quangel lets slip the name of Otto's late son's fiancée, Trudel Baumann. Laub seizes on it, grinding her down over hours of slaps until she admits Otto ran into a married, pregnant Trudel on Kleine Alexanderstrasse, and had banned her after Ottochen's death, when Anna sheltered Frau Rosenthal, the Jewish neighbour who later jumped to her death. Anna confirms her sister-in-law, Frau Heffke, is under arrest, having seen her in a corridor; her cellmate Berta Kuppke is brought up, beaten to corroborate it, then sent back in tears. Laub presses on whether Otto was dropping a card when he met her, and what Trudel knew of the cards. Anna insists she alone handled the cards and swears never to betray Trudel, but exhausted and threatened with Trudel's beating, she breaks and tells him what he wants to know.

Part IV opens by widening the novel's cruelty outward from the Quangels to everyone they ever knew, Laub's method built on exhaustion rather than evidence. Anna's collapse, betraying Trudel despite every vow, completes the book's bleakest pattern: resistance dismantled not by torture alone but by love for those it endangers.