Under Investigation

The Hit. One of Australia's most senior officers was killed in his driveway in a suspected professional hit. Investigators jailed and then freed another man. Who killed Colin Winchester?

Ambush. Four young police officers sent to a rural property are ambushed by violent extremists. They faced the siege at Wieambilla - the point when conspiracy became violence.

An Excellent Murder. He was brave enough to stand up to the mafia in a country town, but Don Mackay paid the ultimate price.

Ghost Ship. Australia's most baffling maritime mystery: the 1988 disappearance of the Patanela just 16 kilometres off the coast of Sydney.

The Disgraceful Doctor Manock. One of the world's most unforgivable legal scandals: how South Australia's chief forensic officer operated for decades with barely a qualification, giving evidence in 400 criminal cases that saw innocent people imprisoned.

Where's Willi? Australia's first celebrity chef, star of radio and television Willi Koeppen, runs one of the country's most successful restaurants before he vanishes without a trace in 1976.

The Man In The Hole. Ray and Jennie Kehlet set off for a prospecting trip to the WA outback in March 2015. Their adventure turned into a tragedy, with Ray killed and Jennie still missing.

Slug Gate. After government inspectors find a slug in a Melbourne catering company's factory, a public health warning erupts into a bitter David and Goliath brawl.

Bad Faith. Uncover the terrifying abuse faced by young, vulnerable women at the hands of the Esther Foundation, a Perth cult once backed by some of the most powerful leaders in the country.

Girls Gone. In 1973, 11-year-old Joanne Ratcliffe and four-year-old Kirste Gordon were snatched from the Adelaide Oval. Deploying groundbreaking new technology to help identify their kidnapper and reveal a shocking twist.