Die Before I Wake (2007)

Robi Ness (Sara Marie Taylor) ventures into a town that has been quarantined for an anthrax-like disease. She soon finds herself being pursued by a masked sniper and later befriended by a quirky old man named Snake (Rockart Von Felker) who resolves to help her caztch the sniper. But all is not what it seems in a town where no one can enter and no one can leave. Robi discovers what people will do when the eyes of society are not around to watch and she must face the greatest challenge of her life; questioning her own sanity.