Tiahleigh Palmer's accused killer, her foster father Rick Thorburn, has woken from a medically induced coma, 48 hours after he allegedly attempted to self-harm while in custody.
Thorburn, 56, is believed to have overdosed on pills at Beenleigh watch house soon after being charged with the murder of his 12-year-old foster daughter on Tuesday.
The Queensland Police Ethical Standards Command has launched an investigation into the incident.
Queensland Police confirmed Thornburn woke from the coma today and is now in a stable condition. He has been transferred from intensive care, to Princess Alexandra Hospital's secure unit in Brisbane.
Thorburn's wife and eldest son have returned to their rural Chambers Flat home, the scene of Tiahleigh's alleged murder, after being released on bail.
In somewhat bizarre scenes at the property on Wednesday, Julene Thorburn was seen in her yard feeding her horses, as specialist forensic police continued searching the area.
Police are continuing to scour the acreage, as investigations in the case continue following the laying of charges against the couple and their two adult sons on Tuesday.
Rick Thorburn was remanded in custody in his absence in Beenleigh Magistrates Court on Wednesday, where he had been scheduled to appear.
In the first major breakthrough in the investigation last week, police seized the Ford Falcon, which Thorburn sold online after he allegedly killed Tiahleigh.
It came after a tip-off to investigators.
Tiahleigh had been living with the Thorburns for 10 months when she died.
In addition to fostering, the family ran a daycare centre until six months after the schoolgirl's death.
Her grandmother Sue Palmer told the Courier-Mail Tiahleigh had the opportunity to leave the Thorburn family's property but wanted to remain.
Tiahleigh's mother, Cindy Palmer, was attempting to regain custody of her daughter when she died.
"She said she wanted to stay because of the boy and because she loved the horses on the property that they have there," Ms Palmer told The Courier-Mail.
"We didn't have any idea as to what was actually happening there - just that she had a crush on the boy and that was the main reason she wanted to stay."
Cindy Palmer, who, in a Facebook post, alerted media to the fact the car seized last week once belonged to the Thorburns, is yet to comment publicly on the charges laid over her daughter's death.
Where to get help:
• www.lifeline.co.nz - 0800 543 354 (available 24/7). • Suicide Crisis Helpline - 0508 828 865 (0508 TAUTOKO) (available 24/7). • www.youthline.co.nz, Youthline - 0800 376 633. • www.kidsline.org.nz, Kidsline - 0800 543 754 (available 24/7). • www.whatsup.co.nz, Whatsup - 0800 942 8787 (1pm to 11pm). • www.depression.org.nz, Depression helpline - 0800 111 757 (available 24/7). • www.rainbowyouth.org.nz, Rainbow Youth - (09) 376 4155. • www.samaritans.org.nz, Samaritans - 0800 726 666. • If it is an emergency and you feel like you or someone else is at risk, call 111.