An Adelaide man who admitted killing his partner has now also pleaded guilty to murdering her two children.
Steven Graham Peet killed Adeline Yvette Wilson-Rigney and her children, Amber, 6, and Korey, 5, at a property north of Adelaide in May, 2016.
His trial in relation to the children was scheduled to resume on Monday but Peet entered his guilty pleas instead.
Steven Graham Peet pleaded guilty to killing Adeline Yvette Wilson-Rigney, 28 (pictured)
Steven Graham Peet killed Adeline Yvette Wilson-Rigney and her children, Amber, 6, and Korey, 5, at a property north of Adelaide in May, 2016 (children pictured)
Steven Graham Peet (pictured in blue) killed Adeline Yvette Wilson-Rigney and her children, Amber, 6, and Korey, 5, at a property north of Adelaide in May, 2016
The change followed a more recent psychiatric report.
The bodies of Ms Wilson-Rigney and the children, aged five and six, were found in a house at Hillier.
All three had cable ties around their necks and their bodies were hidden under clothes and bedding and, in the case of the boy, under a child’s play tent.
The young girl had adhesive packing tape wrapped around her head and a sock had been stuffed in her mouth.
The boy had parts of his body wrapped in packing tape and his hands and feet were secured behind his back in a hog-tied fashion.
Peet initially pleaded not guilty to the murder of the children, claiming he was in a disassociated state at the time.
Steven Graham Peet (pictured) has pleaded guilty to killing Ms Wilson-Rigney last year