When Ivan Milat was arrested in 1994 for the murders of seven backpackers in the Belanglo State Forest, Mary Ashby immediately realised he might also be responsible for the baffling disappearance of her teenage daughter.
Australia's worst serial killer lived just 10 minutes away from Mary's family home.
At that point, it had been six years since Mary last saw Debbie after the 16-year-old left their home in Leumeah, in Sydney's south-west, and was never seen again.
Over the years
