Rule documents the investigation into the death of Jenn Corbin, whose apparent suicide in December 2004 was later discovered to be a murder committed by her husband, Bart, who was also linked to the suspicious suicide of another woman years earlier.

Journeys inside the twisted mind of a killer, Dr. Debora Green, after the cancer specialist was arrested for the arson murders of two of her three children and the attempted poisoning of her estranged husband.