If you've loved Black Hands here's a recommendation for another Stuff podcast we think you'll love. It's called The Trial.

It’s about a fascinating murder case which went to trial even though there was no weapon or body. After a hung jury, finding ourselves in the middle of our own legal challenge and then a retrial... The Trial podcast is finally back with a verdict. Check out The Trial and follow the show to get instant access to the whole series... But for now, here's a sample for you, as we return to court for The Retrial of David Benbow…

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In this special bonus episode Imogen Wells and Emile Donovan take a peek behind the scenes of Black Hands in their conversation with host, Martin van Beynen. This interview originally appeared in Newsable, Stuff's daily news podcast.

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In 2012 Canadian judge Justice Binnie said David Bain was innocent on the balance of probabilities. Why? Hear what Binnie says and what Martin van Beynen makes of his arguments. And why does Binnie compare van Beynen to Inspector Javert, a fictitious fanatical police inspector?

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The equation is simple: It had to be either Robin or David.

Now it's time to make a decision.

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Despite giving evidence in court only once, David Bain has said a lot about the shootings in various contexts.

He has steadfastly maintained his innocence but the details of his story have changed. How plausible is it?

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If Robin murdered his wife and children, his final task would be to shoot himself. But how likely is it that a right-handed man would shoot himself in the left temple? Is it even possible?

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Could Robin have murdered his children and then taken his own life? Robin had blood and bruising on his hands. His foot size was more likely to fit bloody footprints in the house. Was a mysterious note left on the family computer Robin's final words?

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Although police initially regarded the shootings as a murder/suicide, evidence began to mount against David Bain.

His fingerprints were on the rifle, he had blood on his T-shirt, a lens from glasses in his bedroom were found in his dead brother's room and he had injuries that were consistent with a fight.

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Motive has always been the most puzzling aspect of the Bain shootings.

Neither Robin nor David seemed like mass killers. But both had reasons to kill.

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The shootings appalled the country and deeply shocked the community and wider Bain family.

Yet sole survivor David Bain's unusual reaction surprised many. Loyalties were tested. Suspicions were raised. And then an arrest is made.

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From the outside, the Bain family seemed to have settled into a new life in Dunedin.

Eldest son David was on a new path, while sister Laniet appeared to have given up prostitution and Arawa was thriving as a budding teacher.

But in the six months before the shootings, cracks began to emerge.

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