Police in Queensland had charged Max Sica 11 days ago with three counts of murder, but he denied that he had anything to do with the deaths, with his lawyer Michael Byrne QC brought forth at the bail hearing in the Queensland Supreme Court.
"It has taken the police some six years to put together what is essentially a circumstantial case," Courier Mail quoted him as saying.
The incest angle of the case emerged during Sica's bail hearing, where it was revealed that Vijay Singh, the children's father, had tape-recorded conversations in the house.
Police transcribed a recording made in 2003, before the murders, in which Shirley Singh, the children's mother, angrily accused her husband of indecent behaviour.
"You touched my daughter's pubic area," she had said.
She also accused him of forcing her to have sex with a woman and many men, and possibly with Sica.
In a statement to police in November 2004, 18 months after the murders, which was also tendered to the court, Vijay Singh denied the charges.
"I have never approached Max Sica and encouraged him to have sex with my wife, Shirley," he said. (ANI)