The mother and father of Thomas and Stuart Kelly have spoken candidly about the warning signs that their youngest son was contemplating taking his own life - as they urge parents to 'listen to your children. And then listen harder'.
In a new book, Ralph and Kathy Kelly reflect on the tragic circumstances that led to Stuart Kelly's suicide in 2016, four years after his brother Thomas died from a cowardly assault.
Warning signs included Stuart shutting himself in his room for weeks, wanting to 'get the hell out of Australia', a cavalier attitude toward money and tearing down his social media accounts the weekend before he died.
And there was little doubt 'if Thomas hadn't been killed, Stuart would be alive today', Mr and Mrs Kelly wrote.
Stuart Kelly with his mother and father. Stuart took his own life in 2016. He was 18-years-old
Stuart lost his beloved older brother, 18, in 2012 when he was brutally punched in the head on his first night out in Sydney's Kings Cross party district.
The family were thrown into the spotlight and campaigned in favour of the city's lockout laws.
But the changes and their advocacy led Stuart and his family to suffer from a 'tidal wave of hatred'.
In their new autobiography Too Soon, Too Late, Mr and Mrs Kelly said they would have done none of their campaigning work 'if it saved Stuart's life'.
They said their son had said he wanted to get away from Sydney in the wake of his brother's death.
But he truly took a turn for the worst after attending his first day at St Paul's College, at Sydney University.
Something happened that night, and he pulled out of the college, having 'radically changed in 19 hours'.
He never fully told his parents what had happened, but they are in no doubt it had a terrible impact on Stuart.
The Kellys wrote: 'We believe without a doubt that his experiences at St Paul's were responsible for the sudden downturn in our son's life ...
'The online bullying, the campaign against the lock-out laws - that was targeted at Ralph, not Stuart - all may have played a part.
'However, it was that night at St Paul's where Stuart felt something personal and awful was directed at him.'
What followed next were changes of behaviour that Lifeline expert Rachel Bowers said are common signs of someone contemplating suicide.
Stuart was never the same after an incident at St Paul's College and kept to
