Her naked body was found washed on the banks of a river a week later

Tiahleigh was last seen in Logan south of Brisbane in October last year

He has also been arrested for attempting to pervert the course of justice

A 19-year-old man has been arrested for incest and two charges of perjury

Tiahleigh Palmer's foster father, 56, is to be charged with alleged murder

Tiahleigh Palmer's foster father has been charged with murder and his 19-year-old son has been charged with incest.

Rick Thorburn, 56, collapsed shortly after he was charged with the 12-year-old school girl's murder and interfering with a corpse at the Beenleigh Watch House, south of Brisbane, just before 4pm on Tuesday.

Police said his 19-year-old son, Tialeigh's foster brother, was also charged with incest, attempting to pervert the course of justice and two counts of perjury.

This comes 11 months after Tiahleigh's naked and decomposing body was found dumped on a river bank, sparking outcry from the tight-knit community in Logan.

Tiahleigh's foster mother, 54-year-old Julene Thorburn, and her other foster brother, aged 20, were also arrested and are continuing to assist police with their inquiries.

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Four people have been taken into police custody over the murder of Tiahleigh Palmer, 12

A 56-year-old man is pictured being taken into police custody on Tuesday morning

Tiahleigh Palmer's foster father has been charged with her alleged murder as three others remain in custody for questioning

The foster father is pictured being taken away in a police van to the Police Watchhouse in Brisbane to be charged with murder

The 56-year-old foster carer was taken to the Princess Alexandra Hospital in a stable condition after losing consciousness while in custody, while the rest of the family remain at the Beenleigh Watch House.

Both men are due to appear in Beenleigh Magistrates Court on Wednesday.

They were denied bail and remanded in custody.

Detective Inspector Damien Hansen said Mr Thorburn had not told police anything, while his wife, who has not been charged, is cooperating at this stage.

Police confirmed the blue Ford XR6 seized by police for forensic examination last week belonged to the 56-year-old foster father.

The 2009 model car had been sold and police confirmed its current owner was not connected.

The foster parents were taken into custody wearing handcuffs on Tuesday.

A woman is taken into police custody wearing handcuffs on Tuesday

An unidentified man is taken into custody on Tuesday as four people speak with police

All four people are known to one another and Tiahleigh, Det Insp Hansen confirmed, adding that they were all located at various addresses in Logan on Tuesday morning.

Det Insp Hansen said it was a tragic event and said he was pleased with the way the investigation had developed.

The Det Insp later told a press conference, about 4pm Tuesday, police had received more than 3,500 separate lines of enquiry during the investigation.

He said the investigation had taken 11-months to ensure they had sufficient evidence to go before a court.

'Some jobs aren't easy. It was a real whodunit type investigation.

'As far as we’re looking at Tia’s death, at this stage, is by no means is this over. There’s a lot of work to go over yet.'

Detective Inspector Damien Hansen said the foster father had not told police anything

Tiahleigh's foster father, 56, is escorted by police from the Logan Central Police Station to the Police Watchhouse in Brisbane

The man is arrested to be charged with Tiahleigh's alleged murder

Det Insp Hansen thanked the Logan community for being 'fantastic' and 'strong'.

He said the murder investigation had 'galvanised the community'.

South Eastern Regional Crime Coordinator Superintendent Kerry Johnson said detectives had been working for 11-months towards this outcome.

'A team of dedicated detectives and police officers from the Homicide Group and the Logan District have been working long and endless hours to locate those responsible for her death,' Detective Superintendent Johnson said.

'Make no mistake, this is an investigation that is close to the hearts of all officers whose sole aim was to bring her alleged killer to justice.

'The QPS values its relationship with the media and recognises that a strong two-way partnership is vital in order to appeal for public's help in solving crime.

A woman is pictured being taken into police custody on Tuesday morning

'We want to thank them and the public for their assistance in this matter.

'I also want to particularly thank the Crime and Corruption Commission for their continuing support and assistance.'

Tiahleigh, 12, was last seen being dropped off by her foster carer in the morning at Marsden State High School, south of Brisbane on October 30 last year.

The schoolgirl's naked decomposing body was found on November 5, along the banks of the Pimpana River, 40 minutes away from her school.

Tiahleigh's death resulted in a review earlier this year leading to a change in reforms for children who go missing from out-of-home care, reported Nine News.

Last week, a blue Ford XR6 sedan was taken by Queensland Police for forensic examination

Search crews are pictured scouring bushland during the investigation last year

Tiahleigh's body was found on the bank of Pimpana River, 40 minutes away from her school where she was last seen a week prior

Under the existing protocols police took almost a week before they released a missing persons alert.

But all 29 recommendations admitted in a Queensland Family and Child Commission report were implemented.

'The report highlights that more can be done to improve whole-of-government systems and ensure more timely and co-ordinated responses for children missing from out-of-home care,' Queensland Premier Annastacia Palaszczuk said in July.

The Facebook page that was set up to find Tiahleigh when she was still considered a missing person is still operational.

Tiahleigh, 12, was last seen being dropped off by her foster carer in the morning at Marsden State High School, south of Brisbane on October 30 last year

TIMELINE OF TIAHLEIGH PALMER'S MURDER October 30, 2015: Tiahleigh was last seen about 8.10am when her foster father dropped her off near Marsden State High School. November 5: Police appealed to the public for information on her disappearance and released an image of the 12-year-old. November 6: Fisherman found her body on the banks of Pimpama River. She was no longer wearing her school uniform. November 14: About 600 people attended her funeral. February 15, 2016: A $250,000 reward for information which would lead to an arrest was offered by police. March 23: Police forensically examined an empty house in Logan. July 11: Queensland schools became required to inform parents and carers if a child was absent. September 13: A blue Ford XR6 was seized by police and forensically examined. September 19: Tiahleigh's mother said the car belonged to her foster carers. September 20: Four people were taken into custody and her foster father was charged with her alleged murder. Advertisement

The schoolgirl's naked decomposing body was found on November 5, along the banks of the Pimpana River, 40 minutes away from her school