In 1994 twenty-two-year-old dancer and model, Revelle Balmain vanished. What really happened that night remains a mystery. We re-trace Revelle's final steps.

He's been described as Australia's Hannibal Lecter, an opportunist killer, with unspeakable obsessions. Is this Australia's worst child killer? A look inside the mind of Derek Percy to question whether he is insane or evil.

Renae Marsden died by suicide on the day her relationship ended. Her family reveal the inside story and the tragic twist, where Renae's tormenter is yet to be brought to justice.