Serial killer Ivan Milat.

Serial killer Ivan Milat. Photo: Darren Pateman

INVESTIGATORS have dubbed her ''Angel'' and they hope they are one step closer to knowing why her bones were dumped in the forest made infamous by the serial killer Ivan Milat.

Information received by police indicates a female, whose remains were found by trail bike riders in the Belanglo State Forest in 2010, may have been a German backpacker who worked on a vineyard in Western Australia's Margaret River.

Police have broadened their inquiries beyond NSW to WA in the hope of tracing Angel's final movements.

A reconstruction conducted by a forensic anthropologist found Angel to be between 13 and 25 when she died in suspicious circumstances in the forest up to 10 years ago.

Her bones had been there for less than a year when they were found and were two metres away from an anklet sock, a shoelace, an earring and a decomposed T-shirt with the word ''Angelic'' on it.

The new information draws an eerie resemblance to Milat's brutal murders. Of his seven victims, three were German backpackers murdered or dumped in the forest.

Yet forensic testing ruled out the possibility that Angel was an eighth victim because she died after Milat was imprisoned for life in 1996.

Detective Inspector Angelo Memmolo said police were far from a breakthrough.

''We are tracing back through a lot of inquiries from several states,'' he said.

Officers have combed missing persons records and rumoured disappearances in several states. After an exhaustive two-year investigation, they are relying solely on leads from the public.

On Friday, police re-released an image of the distinctive T-shirt.

The size 10, short-sleeve shirt was produced by the bicycle and garment company Chain Reaction and was only available for sale between 2003 and 2006. It has a rose and a heart with wings with ''Angelic'' in pink text.

Susan Hayes, from the University of Western Sydney, examined Angel's skull extensively and used computer graphics to reconstruct an image of her face.