Goodbye and Good Luck

The CSI's investigate when a college freshman plunges to her death and her death is revealed to be a murder. They discover the victim had a relationship with Marlon West, a teen who was acquitted on a murder charge with the help of his younger sister, a child prodigy named Hannah. Sara handles the case and she becomes convinced Hannah killed Marlon's girlfriend and is framing him for the murder as an attempt to put him in jail and keep control of him. Sara burns out at the end and leaves Las Vegas.