It's been 25 years since Martin Bryant brutally murdered 35 people – the deadliest mass shooting in Australia's history.
But damning new allegations, detailed by former neighbours of Bryant, have revealed the people tragically killed on April 28, 1996, might not have been his first victims.
In allegations aired onChannel 7's Spotlight, Bryant's former neighbours and associates spoke about his longstanding friendship with an older, wealthy woman named Helen Harvey.
Martin Bryant brutally murdered 35 people - the deadliest mass shooting in Australia's history. Photo / Supplied
Harvey died in October 1992, less than four years before the Port Arthur massacre.
Her death was always believed to be an accident after the car she was driving, with Bryant in the passenger seat, crashed on a remote country road in Tasmania.
However, friends of Harvey told the programme she had said she feared Bryant would one day kill her after his odd tendency to grab the steering wheel while she was driving created problems for her on the road.
Witnesses to the crash said they saw Harvey's car "swerving" before it ran off the road, killing her and leaving Bryant injured.
Barry Featherstone, one of Harvey's neighbours, said he had previously helped free her car from a ditch after Bryant pulled a similar stunt.
Police called to the property to take part in the search for Maurice told Spotlight Martin asked out a policewoman who had been assisting in the investigation.
Hours later, Martin watched on as police divers pulled Maurice's body from a dam on the property.
Tied around his neck was his son Martin's diving belt, strung with heavy lead weights.
His death was ruled a suicide by the coroner.
Documents from the National Archives in Hobart, obtained by Spotlight, showed the final will and testament for both Harvey and Maurice Bryant.
Harvey's will left her house and farm to Martin – however Maurice was named as trustee, meaning Martin had no power or ownership over her property while his father was alive.
Maurice's will also left $269,000 to his son Martin which meant the younger Bryant stood to collect a farm, a house and $269,000 once Harvey and Maurice had died.
Spotlight suggests the amount Martin had to gain from both Harvey and his father's deaths were motive enough to commit the murders.
Maurice's suicide has long been linked to David and Nolene Martin refusing to sell him their Seascape Hotel.
The Martins were the first two people Bryant killed on April 28, 1996.
Bryant 'virtually unrecognisable'
Bryant, now aged 54, will spend the rest of his life in Tasmania's notorious Risdon Prison after he was given 35 life sentences in 1996.
Tony Burley, a former Risdon prison guard, said Bryant had an uneventful life in prison because he never has, and never will be, let out into general population.
"He wakes up, he goes to sleep basically," Burley said.
Recent photos of Bryant showed the mass murderer had gained a lot of weight in prison.
Martin Bryant is serving a life sentence. Photo / Channel 7
Burley said the killer had put on weight because he was being "rewarded" for giving sexual favours in the prison canteen.
"His long blonde hair was gone and he began to put on weight – [he's] virtually unrecognisable," he said.
"He has ... increased his calorie intake due to sexual favours from the prison canteen."
