Question: In what states were eleven people murdered by the American teenaged spree killer whose murder spree the film Badlands is based on?
Sentence (from "Badlands (film)"): The story, though fictional, is loosely based on the real-life murder spree of Charles Starkweather and his girlfriend, Caril Ann Fugate, in 1958, though that basis was not acknowledged when the film was released.
Relevant evidence: Yes