Consolation prize [spoiler alert!]:
‘“Lamb to the Slaughter” demonstrates [Roald] Dahl’s fascination with horror (with elements of black comedy), which is seen in both his adult fiction and his stories for children. The story was supposedly suggested to Dahl by his friend Ian Fleming: “Why don’t you have someone murder their husband with a frozen leg of mutton which she then serves to the detectives who come to investigate the murder?”.’
It was the perfect crime because the police investigators ate the evidence.
Update: Added spoiler alert; thanks @JonS.
