She is believed to have had fair hair and could have been killed as far back as 2007.
Her body was found on July 15 in a suitcase beside the Karoonda Highway, about 10kms from Wynarka, in South Australia’s Murray Mallee region.
South Australia Police said the child was the victim of “... just a horrible violent death and it definitely wasn’t an accidental death”.
They believe the body was in an advanced stage of decomposition before it was placed into the suitcase.
“We believe that most of the decomposition process occurred outside of the suitcase at another location,” Det Supt Des Bray said.
He said police believed the suitcase was left in a bush on the roadside within recent months, but noted that investigators had dated clothing and items found in the suitcase back as far as 2007.
“Some of the clothing has been identified as first having been made in 2007 and some since that time.
“Staining and decomposition of some of the marks on the clothing indicate to us that the child died most likely since 2007,” he said.
“The location of the death remains unknown and it’s still our belief that the little girl was killed elsewhere and her remains put into the suitcase and shifted in relatively recent times. It’s at least back as far as March and April but it may have been many months before that.”
The body does not fit the description of any current missing persons in South Australia. Some 24 potential victims have been ruled out.
He said detectives had been working with interstate counterparts and that police were still trying to locate a man aged about 60 who was spotted in the area in recent months carrying a suitcase. Supt Bray appealed to the man to make himself known to police so that he could be eliminated from inquiries.
“In relation to the suitcase man, there’s been sightings on the 13th of April and the 26th of May on Karoonda road just west of Wynarka, carrying a suitcase,” he said.
“We have no idea who that person is or why he might be there but they’re credible sightings and we believe them.”