About CSI: Crime Scene Investigation Season 6, Episode 18 :

A teenage boy, Marlon, is being prosecuted for a murder of one of his female classmates, Stacey. During his trial, his 12-year-old sister Hannah takes the stand, and admits that she herself murdered Stacey, not Marlon. The CSI team is now faced with a strange dilemma - two confessions for the one murder. Collusion seems unlikely. As Hannah is a genius, in high school already, even though her confession sounds convincing, some CSI members suspect that she is making up her confession and could not have physically committed the murder. It now has to be decided who should be prosecuted for the crime. Guest Stars: Wallace Langham, Douglas Smith, Imani Hakim, John Rubinstein, Meredith Scott Lynn, Juliette Goglia, Jessica Tuck, Steven Grayhm, James McCauley, Jim Holmes, Erik Jensen, Jeffrey Hutchinson, Mark Tomesek, Lisa Clifton, Maitland McConnell, Mari Weiss, Louise Lombard, Sheeri Rappaport, Marc Vann,