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Dubois denied killing McCulkins: brother

AAP logoAAP 14/11/2016 Sarah Motherwell

The daughters of Barbara McCulkin were not meant to be at home when two men allegedly went there to kill her in 1974, a Brisbane court has heard.

Garry Dubois, 69, is on trial in the Queensland Supreme Court for raping and murdering siblings Vicki and Leanne McCulkin and killing their mother, Barbara.

Paul Dubois told the court on Monday he spoke to his younger brother by phone after watching a TV show more than two decades ago which identified him as one of Australia's most wanted.

Mr Dubois said his brother denied having anything to do with Mrs McCulkin's murder and it was Vincent O'Dempsey who killed her because she had information that would put him in jail for 20 years.

"Barbara McCulkin was blackmailing O'Dempsey," he told the court.

"He (Garry) said Vince told me the kids weren't meant to be there."

Mrs McCulkin and her daughters bodies have never been found but the trial has previously heard evidence Dubois and O'Dempsey took the trio from their Highgate Hill home and killed them in bushland.

Mr Dubois said the call to his brother happened some time before Garry was arrested but he had not spoken to him in 22 years because of a falling out over a family matter.

He said he had not spoken about the phone call with his brother to anyone until 2014 when police asked him for a statement.

The trial has heard Dubois and O'Dempsey were paid to start a fire in February 1973 at the Fortitude Valley club Torino, presumably for insurance or extortion purposes.

The prosecution alleges the pair feared being linked to the fatal Whisky Au Go Go nightclub blaze, which occurred 11 days later.

While the prosecution does not allege Mrs McCulkin was blackmailing O'Dempsey, information she may have had about the fires could have been motivation for killing her.

Her estranged husband Billy McCulkin, who is now dead, testified at a coronial inquest in 1980 that he could not find his wife and children when he went to their Highgate Hill house in January 18, 1974.

Mr McCulkin, whose transcript was read at the trial on Monday, told the inquest personal items were left at the house including Mrs McCulkin's engagement ring, her purse and the children's money boxes.

The family's two Siamese cats had also been locked in the laundry, the court heard.

The trial continues.

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