: Elsa Greer killed Amyas. She overheard him tell Caroline that the affair meant nothing and that he intended to send Elsa away as soon as the painting was finished. Spurned and vengeful, Elsa poisoned his beer.
Fourteen years before the main story, Amyas Crale was found dead at his estate, Alderbury, poisoned by . At the time, he was having a flaunted affair with his young model, Elsa Greer . Because Caroline had discovered the affair and allegedly stolen the poison from her neighbor's lab, she was convicted and hanged for the crime. Before her execution, she wrote a letter to Lucy claiming her innocence. The "Five Little Pigs" (The Suspects) [S9E1] Five Little Pigs
: Still feeling guilty for disfiguring Angela years ago, Caroline deliberately staged the scene to look like a suicide and went to the gallows without a fight to "pay her debt" and protect her sister from a crime she didn't commit. : Elsa Greer killed Amyas
Through his psychological analysis of their testimonies, Poirot discovers a heartbreaking truth: Fourteen years before the main story, Amyas Crale
Poirot investigates by interviewing the five other people present on the day of the murder:
The story of the episode "[S9E1] Five Little Pigs" is a tragic "cold case" mystery based on the Agatha Christie novel. It follows Lucy Crale as she enlists Poirot to prove that her mother, Caroline Crale , was innocent of murdering her father, the famous painter Amyas Crale , 14 years earlier. The Setup: A Crime of Passion?
: The devoted governess who witnessed Caroline's behavior at the scene.