A doctor who posed for a selfie with his wife moments before bludgeoning her to death wrongly thought she was having an affair with his close friend.
Robin Michael, 63, posed for the photo with his wife Kerry, 44, while climbing Mt Roland, in northwest Tasmania, on holiday in February 2015.
The findings of a coronial inquest, released on Thursday, found he then launched a 'brutal, vicious and sustained' attack on his wife, shattering the base of her skull.
He then came down from the mountain and posted a confession to Facebook, saying he couldn't understand his own actions as anything other than 'pure evil'.
After drafting a suicide note and letter of confession to his children, he attempted to kill himself later that night at a lonely caravan park.
Police were able to reach him in time after a friend spotted his disturbing social media post and alerted authorities, who raced him to hospital under guard.
Robin Michael (left) bludgeoned his wife Kerry (right) to death on a Tasmanian mountainside minutes after he posed for a selfie with her, a coronial inquest has found
The findings of the inquest, released on Thursday, found Michael (pictured with his wife) launched a 'brutal, vicious and sustained' attack on his wife which shattered the base of her skull
Michael then came down from the mountain and posted a confession to Facebook, saying he couldn't understand his own actions as anything other than 'pure evil'
'I have committed an act which should attract no pity, no sympathy, not even any understanding. I can't understand it,' Michael wrote hours after murdering his wife, News.com.au reported.
'That it was an effect, rather than a cause, bears no consequence. It was not appropriate, necessary, nor anything really other than pure evil.'
The former general manager of Royal Darwin Hospital accused his wife of having an affair with one of his closest friends - a claim dismissed by coroner Simon Cooper in his findings.
He said that there was 'absolutely no evidence' of an affair - which Tasmanian police investigated - and that he was satisfied that Michael's