In 1985, Arthur Easton was murdered by a bayonet wielding intruder, in his Papakura home.
His two sons were also injured trying to fight off the attacker.
In 1986, Alan Hall was convicted of the crime and spent 19 years in jail. But he has always protested his innocence and 37 years after Easton's death, Hall's convictions were quashed.
Stuff senior investigative reporter Mike White and Alan's brother Geoff share details of the case and Hall's fight for justice.
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