Why are all of the plot summaries for this film wrong?
They ALL (on here and wiki) state that the film starts with Billy's backstory, then his escape and then the present day murders.
Wrong. It starts with Claire's murder. Billy's backstory doesn't even start until 20 minutes in.
I guess the wrong summaries would have been better because having Billy break out AFTER the murders is done is pretty stupid if they want him to be a credible suspect.