Nicole Cartwright, whose body was found at Buffalo Creek Reserve, Hunters Hill, shown on CCTV footage exiting Museum station on September 30. Credit:NSW Police No arrest has been made and the cause of death remains unknown. However, it is understood she suffered severe injuries consistent with assault. In a further appeal for information on Wednesday, homicide investigators revealed how they used Ms Cartwright's Opal card to determine her last known movements between September 27 and September 30. Nicole Cartwright's body was found by a council worker at a Hunters Hill park last week. Credit:Peter Braig "We are seeking to fill in the gaps. We are doing a lot of work around the victimology in this ... in understanding her life," commander of the NSW Homicide Squad Detective Superintendent Scott Cook said.

He added that Ms Cartwright was "well liked" and a "free spirit, who travelled a lot on Sydney's train system ... [with] a wide range of friends and associates", describing her family as "devastated" at the news of her death. "We would like to hear from anyone in the community who may have seen Nicole travelling on the train system ... and any friends and associates who may have been in contact with her between September 30 and October 3," he said. Nicole Cartwright was first reported missing last Thursday. Ms Cartwright lived with her parents at Lansvale in Sydney's south west and often spent time with friends in Sydney’s CBD, eastern suburbs and surrounds. It is understood her parents reported her missing on Thursday last week, although it was not in response to media reports that the body of a woman had been found in Hunters Hill.

Her brother Ben Cartwright wrote on Facebook on Wednesday that he was "heartbroken" over his sister's death. Loading Replay Replay video Play video Play video "Rest in Peace my little sister! I love you with my all," he wrote. Loading "It is with very sad and heavy hearts that we announce that our beloved daughter, sister and friend Nicole Cartwright has sadly passed away. Details at this stage will not be discussed. Please respect our families wishes by not asking for details and respect our privacy. Funeral information is yet to be decided.

"When we work this out we will put a Facebook post up for anyone that wishes to attend. Thank you for all the love and support we have received from family and friends over the last few days." Investigators say her final days included a visit to friends in Maroubra on September 27. The following day she sent a happy photograph of herself to her parents. Police used Nicole Cartwright's Opal card to track her final movements. Credit:Instagram On September 29 she used her Opal card to travel from Bondi to St Marys, before using it again four times on September 30, tapping the card at Strathfield, Central, Ashfield and Museum railway stations between 4.15 and 9.15pm. A CCTV image capture of Ms Cartwright at Museum station at 9.15pm on September 30 is the last time she was seen alive.