Bronson’s father told Daily Mail Australia his 6ft 7in son Sasha fell in with the wrong crowd in his early 20s.
'He was into drugs and got involved with a bikie gang recovering debts for them,' he said from his home east of Perth.
Following the mysterious death of a close friend, Sasha is said to have told his family "I've got to get out, this isn't my scene". But he was told that if you leave, you're dead.
On June 25, 2003, just a week shy of a year after telling the bikies he was out his housemate found him in his car outside his home, staged to look like suicide by carbon monoxide poisoning.
'The bikies got him and gassed him,' Mr Norrish Snr said.
Bronson’s mum took her eldest son’s death hard and in November 2003 was mistakenly diagnosed with kidney stones when in fact she had a bowl obstruction.
She died just hours later.
At the end of 2010 Bronson’s brother, Brodie was found dead by his wife at home.
A post-mortem couldn't determine a cause of death, with the only theory being that Brodie suffered tachycardia - his heart suddenly beating too fast - which wouldn't show up during an examination.
'That's what Bronson has lived with all these years. I don't tell the story because people don't believe it when I tell them,' Mr Norrish said.
'Bronson and I are very close. He's come through it very well and has a great attitude to life. I'm very proud of him and will support whatever he does.'
Mr Norrish gave an emotional speech at Bronson's wedding to Ines on MAFS, which aired on Monday night, about the deaths in his family.
'We've encouraged Bronson to enjoy life... because life is too short - especially for our family,' he said.
'There's three people missing tonight. Your mother would be looking down on you saying, treat your bride with kindness and thoughtfulness.