Cass Magnall is a woman who conspired with her sister Janis to murder their abusive parents. Cass helped her sister Janis to fake multiple personality disorder after suffering years of sexual, emotional, and physical abuse from their parents.
She is currently serving the maximum sentence in prison as a result of her actions while her sister Janis is institutionalized due to double jeopardy protecting her from being arrested. (SVU: "Alternate")