In the stage play Go Back for Murder, Angela Warren is the younger half sister of Caroline Crale. She used live with her sister and brother-in-law. Angela often used to play tricks on him. Miss Williams was the governess of Angela.
On the day of Amyas' death, Angela was sent away to stay with Miss Williams' sister in London. After that she was sent to school in Zurich.
Angela has a first from Somerville and has written a book on the rock paintings in Hazelpa.
The character of Angela Warren is a rewriting of the character Angela Warren from the novel Five Little Pigs, from which the stage play is adapted.