Elizabeth Herfort was last seen walking through the centre of Canberra on June 13, 1980. She had been socialising with friends at the Australian National University Bar in Acton and is believed to have left to catch a bus home. A person matching her description was seen along Vernon Circle and Commonwealth Avenue between 9pm and 9:45pm, but she never made it home.
Rewards of up to half a million dollars are also being offered for four other unsolved cases. Keren Rowland was 20 years old when she went missing on February 26, 1971 — the night of the Royal Canberra Show. Her remains were discovered at the Air Disaster Memorial nearly three months later.
David Abuoi, also known as Gabrielle Malak Arok, was 35 when he was last seen on the morning of July 10, 2012, in Canberra's CBD. Police suspect he was murdered.
Megan Louise Mulquiney, 17, started work at 8.30am on July 28, 1984, at Big W in the Woden Shopping Centre. She was last seen standing outside the western entrance of Woden Plaza about noon that day, due to catch a bus home but never arrived.
Troy Hugh Forsyth was 17 years old when he was fatally struck by a panel van while walking home with friends along Kent Street in Deakin in the early hours of Sunday March 1, 1987. Police never found the panel van nor its driver despite what they called an "exhaustive" investigation, and that case remains open.