"I'VE DONE a bad, bad thing - I've killed Kylie and I want to hand myself in."
When police took the disturbing call from accused murderer Ronald Michael Craig, 48, the officer knew "it was something serious".
"I was just keeping him on the line, trying to keep him calm," Senior Constable Carl Robinson told an Ipswich court.
"When he said I've killed Kylie,
I said wait there, we'd come and get him.
"He said no worries, I'm not going anywhere."
Craig stands charged with murder after his de facto, Kylie Hitchen, 35, was found dead in her Esk house in January 2011.
The committal hearing into her murder has seen about 25 witnesses give evidence in Ipswich Magistrates Court this week.
On Wednesday Dr Kathryn Uranker, who performed the autopsy on the slain woman, said the victim had received a clean, swift incision to her throat, which almost severed her spinal cord.
"To cut bone requires severe force," Dr Uranker said.
"It might have been a blunt knife with a severe, extreme degree of force, or it might have been a sharp knife with an extreme degree of force."
The doctor concluded Kylie had died as a result of significant blood loss, a severed wind pipe and an air embolism, where large bubbles of gas become lodged in the heart.
Police from Brunswick Heads took the call and detectives from Byron Bay formally charged and extradited Craig to Queensland.
Her family told the court of the turbulent relationship between the pair.
Craig's mother said she often saw her son with bruises, and said he was scared and very nervous at times to return to live with Kylie.
The mother said Kylie was like "a magnet to him - there was always something pulling him back".
Magistrate Donna MacCallum deemed there was sufficient evidence for Craig to stand trial.
He was committed to the Supreme Court in Brisbane on a date to be fixed.