When four people disappeared from a blue farmhouse on the outskirts of the Western Australian town of Nannup in 2007, they left behind the scatterings of a life, a note pinned to their door and a question: was the disappearance a choice... or murder?  In season six of ABC’s multi-award winning Expanse podcast, host Dominique Bayens investigates how those left behind have come to terms with what happened.