A "full review" of the original police investigation into the 1985 murder of Arthur Easton is underway after the Supreme Court quashed Alan Hall's conviction and accepted his innocence.
The review was "logically the first step of any re-investigation process in determining what avenues of investigation may still be available", a police spokesperson said.
On Tuesday, the Crown admitted Hall was the victim of a miscarriage of justice after spending 19 years behind bars for Easton's murder - a crime he didn't commit.
Easton, 52, was killed following the violent invasion of his Papakura family home.
Following the Crown's admission this week, Crown Law's top authority has launched an investigation. Now the police have commenced their own review.
"The review and any further investigation work required will be undertaken internally by a team overseen by Det Supt Dave Lynch," the spokesperson said on Thursday afternoon.
Lawyers for Hall had been pushing for an investigation into how his case was handled.
Speaking to AM earlier, the now 60-year-old said he still had a positive outlook on life despite spending 19 years in prison.
"Yesterday was yesterday, today is today… right this very second I'm living in the moment," Hall said.
Hall's brother Geoff said the family got what they needed. The family has been resolute in its support of Alan - including their mother Shirley up until her death in 2012.
"In 2012, when she passed, she handled the mantle over to me to carry forward and on one of her last breaths, I said, 'I promise I will bring justice,'" Geoff told AM, sitting alongside his brother.
Private investigator and former police detective Tim McKinnel, who helped clear Teina Pora of his wrongful murder conviction in 2015, played a massive role in getting Hall's case before the Supreme Court. McKinnel said there was no reason why the case couldn't be reinvestigated.
"There's still a surviving body of evidence from the case and there are lots of unanswered questions."
Listen to Newshub's Grove Road, a true crime series about Easton's murder and Hall's arrest on iTunes, Spotify, Stitcher, Omny and all major podcast apps.
