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Tia a 'source of income': Thorburn

AAP logoAAP 23/12/2016 Jamie McKinnell

Tiahleigh Palmer's foster brother considered the Queensland schoolgirl a "source of income" for his family when he allegedly confessed to an incestuous relationship in an online conversation, court documents show.

The 19-year-old this week made an unsuccessful bail application after he was arrested for incest and attempting to pervert the course of justice in September.

A Facebook conversation with his cousin not long before the 12-year-old went missing last October was contained within documents filed to the Brisbane Supreme Court.

The 19-year-old allegedly said he had sex with the schoolgirl after she threatened to kill his dog and desperately sought advice.

"I would rather kill myself then (sic) live with my family thinking I am some kind of sicko," Thorburn wrote.

The cousin suggested he ask Tiahleigh to take a pregnancy test.

"I just want the kid gone and out of my life," he later wrote.

"But I know she is also a sauce (sic) of income for mum and dad as well and I can't risk us loosing (sic) money because she is gone."

The documents also contain allegations Thorburn sexually abused another underage girl.

The victim alleged the pair was sleeping at an equestrian event when she was between the ages of 12 and 14 when she felt Thorburn behind her.

"I felt uncomfortable and I pretended to be asleep," she told police.

"It was at this time that (he) groped my breasts and he also put a hand down the outside of my clothing and touched me inappropriately around my genital areas."

She said she thought Thorburn was simply being "a curious teenager".

The victim alleges Thorburn also abused her a second time around four years later, also while the two were sleeping near one another.

Thorburn's father Rick, 56, is also in custody on a charge of murder.

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