Livsey eventually cracks under the pressure and insists that she will reveal the truth to anyone other than Jasper Pine. Archie convinces her to accompany him to the brownstone for her protection, where Wolfe summons Cecily Pine by informing her that he knows who the murderer is. When she arrives, Cecily Pine confirms Wolfe's suspicions--the murderer was her husband, Jasper Pine.
Cecily Pine
Wolfe