On a cold Canberra day in 1984, a teenage girl vanished from outside a shopping centre, presumed murdered. Now, Genevieve Gannon finds, police are close to solving the baffling disappearance of Megan Mulquiney.

I’d just ducked out for a carton of milk when my world turned to horror.

My son was in danger, but he wasn't the only one.

I ripped off his mask and couldn't believe what it was hiding.

Nothing could prepare me for the shocking secret everyone had been hiding.

'You always wonder if that evil person is still out there.'

The chilling case left Australians shocked and traumatised.

When a Sydney mother was murdered in her luxury home, she knew the killer was coming, so she left a clue. Thirty years later, police have finally got their man. Genevieve Gannon reports.

The case shocked the nation and tore families apart.

I tried to walk away from him but then he did something truly despicable.