Of the three deaths, Poirot says one is accidental, one is a suicide, and one is murder. The true murder victim was Rosaleen. The woman known as Rosaleen was not David Hunter's sister; his sister was killed and the housemaid Eileen Corrigan had survived the bombing. Poirot sent to Ireland for a photo of Eileen, which explained the truth of what happened during the war. David persuaded her to be Rosaleen. Now he could kill this accomplice with a morphine pill and marry Lynn, whom he loved. Poirot knows all these details but only some of them are known to the police. Rowley feels guilty about the deaths of Trenton and Porter. The police focus on David killing Rosaleen/Eileen, and proving all of that case. After a while, Lynn returns to Rowley, realizing she does love him, especially after his show of force. Life will not be dull with him.