In 2001, a dismembered corpse is found floating in Galveston Bay, Texas and police arrest Robert Durst for the murder of his neighbour.
Durst reveals details about witnessing his mother's suicide and recalls how he was forced to join his father's business.
A tip leads a district attorney to re-open the investigation into the disappearance of Kathie Durst.
In 2003, Galveston, Texas, becomes a media circus as the press descends to cover Durst's trial.
Family and friends of Kathie Durst continue to hunt for the truth about what happened to her.
The series concludes after a decade of investigating Durst and his alleged crimes, and discussing the cases with dozens of individuals.