CONVICTED triple murderer Max Sica faces up to 45 years in jail after a jury today found him guilty of murdering the three Singh siblings.

The Supreme Court jury in Brisbane found Sica, 42, guilty of murdering Neelma Singh, 24, Kunal Singh, 18, and Sidhi Singh, 12, at their family home in Bridgeman Downs, in Brisbane's north, on April 21, 2003.

Sica, dressed in a charcoal suit with a white shirt and mauve striped tie, showed no reaction when the jury handed down their verdict.

He stood, hands held in front of him, and only spoke when the judge asked him if he had anything to say.

"Well, I didn't kill no-one and the Queensland justice system is corrupt, okay? Sorry, that's all I have to say", Sica declared.

His solicitor, Peter Sagers, said Sica was obviously disappointed and his legal team would consider whether to appeal.

"We've got a month in which to consider appeal," he said.

He said the verdict was very traumatic for both families.

Sentencing was adjourned until Thursday so the victims' father, Vijay Singh, who was not present in court today, could attend.

Sica's barrister Sam Di Carlo was also not present.

Outside court, Max Sica's mother broke down, screaming hysterically at media crews claiming her son is innocent.

Anamaria Sica left court with her son Claudio, both of them protesting that Sica had been wrongly convicted.

"We're obviously devastated," Claudio said.

"Why don't you do your jobs? Be real reporters. Investigate."

Mrs Sica became hysterical, shouting at reporters that the police had not properly investigated the murders.

"I know my son! I know my son! The police in this country covered evidence!"

media_camera File picture: Carlos and Anna Sica, parents of Max Sica, seen during his murder trial at the Brisbane courts complex.

Max's father Carlo, who remained calm as the verdicts were read, ran to his wife after seeing her lose control.

He tried several times to calm her before covering her mouth with his hand and dragging her down the street.

During the 77-day trial, the court heard allegations about a complicated web of relationships involving Max Sica and the Singh family.

Prosecutor Michael Byrne said after Neelma Singh and Sica had a relationship in 2002, Neelma had wanted to break it off.

However, in the weeks before her death Neelma had willingly seen Sica after he falsely claimed he had a brain tumour and just weeks to live in order to gain her sympathy.

The Crown said the three siblings were murdered at some time between 11.30pm on April 20 and 7am on April 21, 2003.

No telephone calls were made or answered at the Singh house after 11.10pm on April 20 and the three siblings were dressed for bed, which indicated they were killed on the Monday morning.

Sica went to the Singh home late on the night of April 20, 2003, to talk with Neelma and possibly have a prayer meeting about his tumour.

The Crown alleged that for some reason - perhaps out of jealously or rejection - Sica strangled Neelma in a fit of rage.

It was alleged Sica attacked Kunal and Sidhi with a garden fork because they could identify him as Neelma's killer.

Twelve-year-old Sidhi was beaten to death, most likely in her bed. Kunal, who was also most likely in his bed, was knocked unconscious.

The bodies of Neelma and Sidhi were dumped in a running spa and Kunal was also placed in the spa where he drowned.

media_camera SLAIN SIBLINGS: Neelma, Kunal and Sidhi Singh.

The Crown said Sica then used bleach and other materials to clean the murder scene and wash away DNA.

Police said a sock print found in bleach had to be left by the killer and it was consistent with Sica's foot.

It was further alleged Sica lied about being home on the night of the murders and also lied about the time he arrived at the Singh home when he discovered the bodies.

Originally published as Sica found guilty of Singh murders