NSW Police allege Chisholm man Jason Paul Hawkins, 46, murdered Stacey Klimovitch with a single shotgun blast in an organised hit when the woman answered her door on June 9.

Detective Superintendent Wayne Humphrey has called the 61-year-old swimming teacher's killing "an execution-style homicide", labelling it "just horrendous".

Following nearly six months of investigations by Strike Force Backhouse detectives, officers arrested Ms Klimovitch's former son-in-law, Stuart Daniel Campbell, 29, in Newcastle on Friday morning.

He was charged with murder and has since been refused bail, with police alleging he "orchestrated" the killing.

Mr Hawkins, the alleged shooter, was arrested at his home on Friday night.

He appeared in the ACT Magistrates Court on Saturday, when he spoke up a number of times despite magistrate James Lawton warning him this might not be in his best interests.

"I know the allegation is murder but there's no statement of facts or nothing," he said at one stage.

"I don't understand what's happening."

The proceedings were ultimately adjourned for two days, with Mr Hawkins remanded in custody, to allow detectives time to travel from Newcastle to apply for the man's extradition.

When they resumed on Monday morning, prosecutor David Swan told the court the Chisholm man was subject to bail in the ACT, where he had an outstanding charge of obstructing a public official.

He said that charge was due to be dealt with in February, but local police did not have any issue with Mr Hawkins being extradited.

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This prompted Mr Hawkins, who appeared via phone, to again interject and address his lawyer.

"Emma, can you hear me?" he asked.

Mr Lawton warned him everyone in the courtroom could and it was not the time to be having confidential discussions, but Mr Hawkins continued to speak and told the court there were no bail conditions.

"Court's adjourned," the magistrate said, raising his voice to be heard above Mr Hawkins as he told the man to briefly speak with his lawyer in private and to stop interrupting when he returned.

After a short break, Mr Hawkins' lawyer, Emma Bayliss, said the extradition application was not opposed.

Mr Lawton accordingly remanded Mr Hawkins into the custody of a NSW Police detective, Senior Constable Benjamin King, who was to take the 46-year-old across the border.

The magistrate said Mr Hawkins, who will be charged with murder, must face Queanbeyan Local Court "as soon as practicable".

This had not occurred by the time that court stopped hearing matters on Monday afternoon.

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