Mrs. Raikes is Emily Inglethorp’s neighbor. Alfred Inglethorp and Evelyn Howard spread the rumor that Alfred and Mrs. Raikes are having an affair, thus justifying Alfred’s supposed unwillingness to testify as to his whereabouts on the afternoon he allegedly bought strychnine. In reality, Alfred and Evelyn want the police to arrest Alfred for not having an alibi, since he could then claim he was simply having an affair with Mrs. Raikes and didn’t want to say as much at first. Their hope is that he’d be acquitted, and then he could never be tried for the crime again, since a person can’t be tried twice for the same crime in England. Poirot, however, stops Inspector Japp from arresting Alfred, thus spoiling his and Evelyn’s plan. He also tells Hastings later on that Mrs. Raikes is actually having an affair with John Cavendish.