NSW Police Assistant Commissioner Michael Fitzgerald alleges Lamarre-Condon moved the bodies to a second location after his "inability to dispose of them" at a previous site.

"The accused drew a bit of a map or at least a bit of a visual to describe where to go," he told Sydney radio 2GB on Wednesday.

Lamarre-Condon, 28, is behind bars after being charged with murdering the couple at Mr Baird's home in Paddington in Sydney's east on February 19.

Police said two bodies, believed to be Jesse Baird, 26, and Luke Davies, 29, were found inside surf bags at the fence line of a rural property in Bungonia, 30 kilometres south-east of Goulburn.

The bodies were left on a gravely side road behind two mounds of gravel, all the indications are that depositing them there was rushed.

There doesn't seem to have been a concerted, determined, attempt to conceal them. Other material was also left there; the police are not disclosing what that material was.

There was still a lot of police activity in the area at lunch time on Wednesday. Police dogs were searching the scene and lines of officers were going shoulder to shoulder in the surrounding area as a police helicopter hovered overhead.

Following the heartbreaking discovery, families of the victims, Jesse Baird and Luke Davies, were brought to the scene by police on Tuesday afternoon.

NSW police announced they had made a breakthrough on locating the missing bodies of the Sydney couple on Tuesday afternoon after speaking with accused killer, constable Beau Lamarre-Condon, 28, at Silverwater prison.

Police confirmed the bodies had been removed from the crime scene near Goulburn on Tuesday evening. Detectives and officers with dogs were continuing examining the scene on Wednesday morning.

Police had said previously the alleged murderer was not co-operating with inquiries.

Mr Fitzgerald also defended NSW Police Commissioner Karen Webb's choice of words when she said she was "very grateful" for the assistance of the accused in finding the bodies.

"I'm grateful that we've removed some heartache from the family," he said.

"I'm very surprised with the criticism the commissioner's got - she'd been nothing but supportive and she's given us every resource."

Ms Webb later clarified that her comment related to feeling grateful that the families of the victims were able to know where their loved ones were.

"If that information didn't come forward, we would still be searching ... so we're grateful that the information came forward in a way that the detectives could act and we could tell the families and take the families to their loved ones," she told Nine's Today program.

Police said they found bodies in two surfboard bags covered in debris at a property in the Southern Tablelands on February 27 at about 1pm.

"They were covered in debris, the state of the bodies won't be known yet until an examination," Detective Superintendent Danny Doherty said.

The property is located on Jerrara Road in Bungonia, 30 kilometres south-east of Goulburn.

Police were still at the Bungonia property on Wednesday morning, as the painstaking task of collecting evidence continues.

"Our focus today will be on continuing the search in the area," Ms Webb said.

The commissioner alleged Lamarre-Condon was familiar with the area.

"I understand it was an area that was familiar to him, but to what extent ... that really is not fully known at this stage, but certainly familiar enough that that's where he went," she said.

"He engaged new counsel yesterday and there had been a shift and we reacted immediately ... which led us to the outcome where we are today."

Meanwhile, gun safety processes within the NSW Police force are being reviewed after the alleged double murder of a Sydney couple by an officer using his police-issued firearm.

The senior constable is accused of using his police-issued firearm in the killing before disposing of the couple's bloodied items in a skip bin at Cronulla, not far from Grays Point.

NSW Police Commissioner Karen Webb has faced questions on police procedures relating to gun safety.

"We're in this position that a police firearm was used and that can never happen again," she told reporters on Tuesday.

"So we've got to look to ways to mitigate that risk in whatever way we can."

A critical incident was declared following the alleged murders, meaning it will be investigated by police internally and reviewed by the Law Enforcement Conduct Commission.

Ms Webb said a senior officer from Victoria Police would also be commissioned to conduct a review of NSW Police systems relating to guns.

"Victoria Police, simply by its size, the nature of their policing responsibility and the type of policing operations they conduct and some lessons they've learned, I think we can learn from them," she said.

Asked if more safeguards were needed in relation to police accessing firearms, Ms Webb agreed.

"We don't want this to happen again, we need to understand how this happened," she said.

Police said Lamarre-Condon had been working as a police officer for a specialist command until February 20 when he called in sick to work.

He was arrested on February 23 when he turned himself in at Bondi Police Station and has been suspended without pay.

Police divers spent hours searching dams on a separate property nearby, on Hazelton Road, on February 26.

The vacant rural property was searched for two days and a small boat was taken away, presumably for forensic testing.

A friend of Lamarre-Condon told police she was with the constable on February 21 - two days after the alleged shooting - and the pair drove to the rural property together.

The friend told officers she was unaware of the alleged murders and waited outside the property for 30 minutes before Lamarre-Condon returned and they drove back to Sydney.

Detective Superintendent Daniel Doherty said police would allege Lamarre-Condon had gone to the first property before returning and moving the bodies to the second property.

"What we will allege is this 28-year-old man acted alone and he is the sole person responsible," the detective said.

Police allege Lamarre-Condon acted alone but divulged "partial admissions" to others before handing himself in, having travelled more than 1000 kilometres from Sydney to Bungonia and Newcastle in a rented van during his attempts to cover up the crimes.

Detective Doherty said police would allege in court that Lamarre-Condon had previously been in "some sort of relationship" with Mr Baird, a 26-year-old former TV presenter.

Mr Davies, a 29-year-old Qantas flight attendant, was the new partner of Mr Baird.

with AAP