Megan blackmails her stepfather later that evening, implying that she has proof of her stepfather's guilt in the murder of her mother. Mr. Symmington coolly pays her an initial installment while not admitting his guilt. Later in the night, after giving Megan a sleeping drug, he attempts to murder her by putting her head in the gas oven. Jerry and the police are lying in wait for him at Miss Marple's recommendation. Jerry rescues Megan and Symmington confesses. The police arrest him for murdering Agnes and his wife.