It could well provide the breakthrough some families have been waiting for over decades, or it could lead to nothing.
But when someone has been missing for 42 years with no trace or any leads, any news is good news.
The ACT government has announced it will be offering $500,000 rewards in five cold cases, including a fatal kidnapping, a hit-and-run death, and the long-term disappearances of two Canberra teenage girls and a 35-year-old man.