Who is Katy Miller from Gone for Good and what is their importance? Gone_for_Good_(novel) English & Literature Katy Miller | Gone for Good

Julie's younger sister, Katy is very much like Julie in appearance. Katy tells Will that she needs closure and seeks to find answers about Julie's murder though she is actually trying to locate Ken, whom she knows to be guilty. Katy actually witnesses the murder though she is only six and the authorities effectively cover up her testimony.