Please answer the following question: Generate a question about the following movie plot: Joan Burrows (Bettis) returns to her hometown of Ovid, Colorado to attend her niece Olympia's (Blanton) high school graduation, but finds herself confronted by her past in the town. Before the graduation is to occur, a young couple goes missing and within a few days a mutilated body is found in the water during a town fish festival. This initiates flashbacks in which Joan's dark past is learned. When Joan was 17, she and her best friend were kidnapped and tortured by a serial killer by the name of Bishop (Cotton). Bishop bound Joan and her friend to an autopsy table where one girl was tortured while the other had the power to make it stop simply by demanding the death of the friend.[2] Joan was able to escape and kill her captor, but was left as the sole survivor of the spree with a scar on her cheek. With the present day's body count rising, questions arise whether Bishop had evaded death or if a new copy cat killer has arisen.[2]
Answer:
Who did Joan kill?