Robin, however, sensed the truth and killed her before leaving for the play. Then he planted the evidence and made the three calls to make it appear that a woman had committed the crime. At this point he still had the photo, but rather than destroy it, he kept it and planted it at Mrs Summerhayes' house to incriminate her. But Poirot had gone through the drawer earlier and did not see the photo, so he knew it had been planted subsequently. Further revelations are also made. Eve Carpenter wanted to conceal her past for reasons of her own, which was why she didn't co-operate in the investigation. Poirot discovers that Dr Rendell may have killed his first wife, which led Mrs Rendell to talk about anonymous letters she'd received warning her of the fact. Poirot now suspects it was Dr Rendell, convinced that Poirot was in Broadhinny to investigate the death of his first wife, and not that of Mrs McGinty, who tried to push him under the oncoming train, not Robin. Maude Williams turns out to be the daughter of Eva Kane's lover, and has always believed that her mother was murdered by Eva and that her father took the blame. She came to see Mrs Upward, who she thought was Eva Kane, intending to confront her, but found her dead and left quietly. She admits this to Poirot, who agrees to keep it a secret and wishes her good luck in her life.