Singh friend recalls birthday 'freak out'

One of the three Singh siblings, Kunal, started "freaking out" when his sister said she'd seen a strange car near their house late one night around six weeks before they were all slain, a court has heard.

Sidhi Singh was celebrating her 12th birthday with friends on March 8, 2003, when she saw the car near their home at Bridgeman Downs, the Supreme Court in Brisbane heard on Monday.

The court heard the group of girls, who were sitting on the driveway, saw two people get out of the car and look towards the Singh house.

The two people got back into the car, drove closer to the house and parked it at the bottom of the cul-de-sac, the court heard.

Three people then got out of the car, the court heard.

One of the girls, who was 12 at the time and cannot be named, told the court on Monday that Sidhi ushered her friends inside and shut the garage door before telling her brother Kunal about the incident.

"Kunal was freaking out," Sidhi's friend said.

She told the court that Sidhi and Kunal's older sister Neelma started receiving phone calls a little later that night that reduced her to tears.

The court has previously heard they were from Neelma's ex-boyfriend Max Sica.

Sica is currently on trial for murdering 24-year-old Neelma, 18-year-old Kunal, and Sidhi, 12.

Their bodies were found in the ensuite spa bath of their home on April 22, 2003.

Sidhi's friend said she had not been concerned at the time about the car and its occupants.

"At that age you were just kind of oblivious to anything bad happening in the world," she said.

She told the court she was interviewed by police in early 2004 but had not mentioned that Sidhi told her brother about the car, or about Kunal's reaction.

She denied defence barrister Sam Di Carlo's suggestions that she was now unwittingly embellishing the story with additional information she had heard in the nine years since her friend's death.

"The car was definitely mentioned," the friend said.

"When I was talking to the police nine years ago it was all very scary for you and things slip your mind very very easily."

The trial continues.