Hopes for learning what happened to Susan Cox Powell after she disappeared from her Utah home in 2009 faded even more with the death in prison of her father-in-law Steve Powell. Nancy Grace explores the case with Susan's sister Denise Ernst, Cox family lawyer Anne Bremner, Cox family investigator Rose Winquist & psychologist Caryn Stark. A Louisiana mother and her reported girlfriend face murder charges in the burning death of the mom's baby boy. Grace examines the case with lawyer Kathleen Murphy, forensics expert Joseph Scott Morgan, and reporter Larry Meagher.