Larissa Beilby's accused killer discussed 'knocking her'

The man accused of murdering a 16-year-old Brisbane girl and leaving her body in a barrel beat her up then discussed "knocking her", a Queensland court has been told.

Zlatko Sikorsky is charged with murdering Larissa Beilby, torturing her, deprivation of liberty and interfering with a corpse between June 23 and 27, 2018.

The teenager's body was discovered inside a barrel on the back of a black ute abandoned at a residential complex at Stapylton on the northern Gold Coast.

Today, his former housemate Scott George Thompson gave evidence during a committal hearing in Beenleigh Magistrates Court about the final hours leading up to Beilby's death.

Mr Thompson said when he heard a scream in the backyard of their Buccan home, Sikorsky told him it was Beilby and she was "not in a good way".

"I could hear noises from (his) car... then we had a conversation with him saying something about 'that chick is (going) insane'," he said.

"He said 'her face was in a bad way and it was getting infected and she was rubbing shit all over her face and she's a bit crazy'."

"I knew he'd punched her in the face," he told the court.

"I said 'just drop her to hospital' (but) he was saying he wanted to knock her."

Mr Thompson said he didn't go to investigate because he was afraid of Sikorsky, who was allegedly high on drugs and carrying a gun.

Mr Thompson's former girlfriend Jessica Amy Schultz, who also lived at the house, told the hearing she also told Sikorsky he should take Beilby to hospital.

"We asked a few times if we could speak to her and see if she was okay," she said.

She said he later asked her to wipe any CCTV footage recorded on their home security cameras.

"I just wanted to do what he asked and not have any dramas," she said.

Asked by defence lawyer Tim Ryan why he withheld information from police investigating Beilby's disappearance, Mr Thompson said he was scared of Sikorsky.

"My so-called mate was coming back to kill us," he said.

"Why would he be calling me saying he's promising me all these things. He said that barrel was full of money and drugs and it had a dead body in it."

The committal hearing continues.