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Qld teen murder informants labelled 'dogs'

People who spoke to police about the unsolved 1989 murder of a Queensland teenage girl were considered "dogs" who were breaking a code of silence, an inquest has heard.

Annette Mason, 15, was found raped and beaten to death in her bed in a house she shared with friends after a night out in Toowoomba.

A Brisbane inquest is hearing evidence from an extended circle of people, many of whom were consuming alcohol and drugs heavily at the time, associated with main persons-of-interest Michael Laine and Allan McQueen.

Witness Margaret Reis has testified she heard multiple stories about Annette's death but her sympathy was inhibited by her drug-taking.

"I know that sounds really harsh - a young girl got murdered - but back then it never bothered me," Ms Reis told the inquest on Wednesday.

"It wasn't my business. It had nothing to do with me. I never talked about it. I never discussed it. I never even thought about it really.

"It was drugs. That's all it was."

Among the "scenarios people were making up over the years", Ms Reis heard Annette died after a "threesome gone wrong" and three women found the girl wrapped in a doona with her "nose split in two" before putting her into her bed.

They did not call an ambulance, the inquest heard, before Annette's body was found the next day.

Ms Reis also recounted how an attitude suggesting "nobody likes a dog" prevailed after Annette's death among her circle.

That extended to another witness in the inquest, Theresa Flynn, who had given statements to police about what she knew.

"I thought she was being a dog, dobbing on us, because there were things going on," Ms Reis said.

"People were getting done and there was a little rat in amongst us.

"All of a sudden, she gets dragged off to the police station while we're sitting there shooting up and smoking weed."

The Mason family's barrister Clem van der Weegen questioned Ms Reis: "You also accept nobody likes a pedophile. Nobody likes child killers. So if somebody was informing the police what they knew about the murder of Annette Mason, that would be, according to the code, okay?"

Ms Reis replied: "No, she'd still be a dog. Not nowadays, back then, yeah, I would have (thought so)."

Also on Wednesday, a witness claimed he heard two people had disposed of Mr Laine's bloody clothes in a waterway 20 kilometres outside of town the day after Annette died.

The witness, who cannot be named for legal reasons, also said he had been physically attacked by Mr Laine.

"He was just a violent person," he said.

The inquest continues.

© AAP 2018