From twin sisters with a violent past with each other whose relationship is questioned when one sister is found dead in a car wreck in Maui to a wife of an adulterous cop found mysteriously deceased, "Accident, Suicide or Murder" retraces an investigation from start to finish, taking viewers through the twists and turns of these shocking cases, from dissecting the red flags to the undeniable evidence, and strange behavior that put the tragedy in question. Viewers hear from first responders, law enforcement, family members and those closest to the victims.