A review into Queensland's child safety mechanisms sparked by the Tiahleigh Palmer case has been broadened as police continue to dig up the backyard of her accused murderer.
Forensic officers will return to the Chambers Flat property of Rick Thorburn on Monday after the 56-year-old foster carer was arrested last week and charged with Tiahleigh's murder.
The case prompted the government to appoint family and child commissioner Cheryl Vardon to review child safety mechanisms, with the arrest leading Child Safety Minister Shannon Fentiman to announce it would also look at the blue card system.
The assessment and approval processes for foster carers will also be scrutinised.
Premier Annastacia Palaszczuk on Sunday announced an expert panel would help inform the review, which is expected to take about six months but will progressively recommend reforms.
"The death of any child is an absolute tragedy," Ms Palaszczuk said.
"I, like all Queenslanders, want to get to the bottom of the tragic circumstances surrounding the death of Tiahleigh."
But Opposition Leader Tim Nicholls continued the push for a fully independent, external inquiry headed by a figure such as a former Supreme Court justice.
The panel includes Foster Care Queensland chief executive Bryan Smith, Bravehearts founder Hetty Johnson, former Department of Communities director-general Linda Apelt and former Queensland Police ethical standards command assistant commissioner Paul Doyle.
