AN "incest" family face a massive joint trial - seven years after cops found 40 adults and kids living in a squalid Australian backwater camp.

Eight members of the infamous "Colt" clan were arrested last year, accused of child abuse, incest and aggravated assault.

8 Martha Colt - with her three sons, Albert, Jed and Karl and holding baby daughter Nadia - was charged with perjury Credit: NEWS.COM.AU

8 Martha Colt is believed to have had four kids with her brother Charlie Credit: NEWS.COM.AU

Betty Colt, 51, her sisters Rhonda and Martha, brother Charlie, Rhonda's son Cliff and Betty's sons Derek and Roderick and daughter, Raylene were detained after police swarmed their camp in Boorowa, New South Wales.

Today, seven of them have said they will waive a committal hearing in a bid to speed up legal proceedings.

The trial is expected to take place later this year.

Cops who discovered the remote property in 2012 were shocked to find kids sleeping in tents without water, toilets or electricity.

HORRIFIC ABUSE

The children couldn't even speak comprehensible English.

Genetic testing suggested 11 of the 12 children, aged between five and 15, had parents who were related.

The family had managed to evade raising alarm bells with social services by moving from state to state, until locals noticed some of the kids didn't attend school.

Since then detectives have amassed DNA, forensic and witness evidence that led to the Colt inner circle being charged yesterday.

IN THE BLOOD

Among those snared was Charlie Colt, 45, who is accused more than a dozens offences including six counts of sexual intercourse with a child under ten.

Martha Colt, 38, was charged with perjury.

Derek Colt, 29, faces two charges of incest with a person under the age of 16 while Raylene Colt, 34, and 50-year-old Betty face perjury charges.

Two men and another woman were also arrested in the Northam area of Western Australia.

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The Colt family originated in New Zealand with Tim and June marrying in the mid-1960s before emigrating to Australia. Betty is believed to be their child.

The clan spread to remote parts of Australia after the NSW farm was raided in 2012.

8 Charlie Colt, Martha’s brother, was arrested with her at Griffith where they were living together in April this year Credit: NEWS.COM.AU

8 The children were found living in filthy, squalid conditions and showed signs of inbreeding Credit: News Corp Australia

8 The Colt incest family tree, showing Martha’s five surviving children are a result of inbreeding

8 A young girl is pictured on the property Credit: News Corp Australia

8 Children were found living in tents Credit: News Corp Australia

8 Children were found to have oddly-formed features caused by identical gene patterns from both parents Credit: News Corp Australia

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