A man accused of murdering a woman and daughter days apart photographed the mother's body in the NSW Belanglo State Forest "as a trophy of sorts", a Sydney magistrate has been told.

Daniel James Holdom also allegedly confessed to stomping on the mother's throat, crushing her windpipe and leaving her body next to a log, as well as suffocating the toddler before throwing her body on the side of a highway in South Australia.

Holdom is accused of murdering Karlie Pearce-Stevenson, 20, between December 14 and 15, 2008, in the forest, and Khandalyce Pearce, aged two, between December 19 and 20, 2008, in the Wagga Wagga area of NSW.

Prosecutor Victoria Engel outlined the crown case in Sydney's Central Local Court on Thursday and handed up 42 volumes of evidence before Magistrate Les Mabbutt ordered Holdom to stand trial in the NSW Supreme Court on two counts of murder.

Daniel James Holdom.

Karlie Pearce-Stevenson and her daughter Khandalyce. (Supplied)

The magistrate found there was "an overwhelming circumstantial case" against the now 42-year-old who told police in 2015: "You've got the wrong guy. You'll see."

Mr Mabbutt said the photos, which a former partner of Holdom's said she found on an SD card from his phone, were the most important piece of evidence in the crown's "large, complex and circumstantial case".

Ms Engel argued "the evidence, including photographing her body in situ, as a trophy of sorts, was all indicative of an intention to kill" his girlfriend Ms Pearce-Stevenson.

Her remains were found in the forest in 2010 but were not identified for five years until after the discovery of Khandalyce's remains some 1200 kilometres away in 2015.

They were located with a suitcase on the side of the Karoonda Highway, west of Wynarka, in SA.

Police combed through the bushland after the discovery of remains on August 29, 2010. (AAP)

The remains of a woman were discovered in the forest on August 29, 2010. (AAP)

Holdom and Ms Pearce-Stevenson were seen to argue while staying with people at Charnwood in the ACT on December 14, 2008, before they drove off in her car.

The housemates said Holdom returned alone after being gone for about 14 to 17 hours, the magistrate said.

Ms Engel alleged he cleaned her car, sold it and obtained another car which he drove to Wagga Wagga, purchasing duct tape and a dishcloth, before checking into a motel with a child.

But he was alone when seen the next day before he drove on to South Australia.

An elderberry towel, having the same batch number as those used at the motel, was found with other items near Khandalyce's remains.

Police search through Belanglo State Forest after the remains of a woman were found on August 29, 2010. (AAP)

"The location where the suitcase was found several years later was entirely consistent with the route of travel he took," the magistrate said.

Ms Engel said Holdom used Ms Pearce-Stevenson's credit card for years after her death, during which time numerous benefit payments continued and $71,770 was debited from her account.

He also was allegedly involved in sending messages from her phone to her mother to curb police investigations into the pair's disappearances.

The case was listed for arraignment in the Supreme Court on October 6.