A Victorian Coroner has failed to name a killer in the 1980 cold case of Maria James. Her sons are devastated. But there's still hope, in leads yet to be chased by police.

The new coronial inquest into the murder of Maria James has wrapped up. Will the Coroner be able to name her killer? And of the police exhibits that haven't disappeared, what DNA testing can be done? This episode nears us closer to the end of the James brothers' 41-year-fight for answers for their mum.

The discovery of a police exhibit - thought to be missing for around three decades - could finally help unmask the killer in the 1980 cold case of Maria James.

The Royal Commission has released its final report into defence lawyer turned police informer Nicola Gobbo.

We reveal the story of Nicola Gobbo's audacious bid to return to Australia.

Everything unravels, for Nicola Gobbo and Victoria Police. Their secret is out.

Nicola hits rock bottom, but Victoria Police wants her to take on a new role ... as a witness.

Nicola wants to be the best source ever, and she leads police to the biggest target of all: the mafia. Her double life is getting riskier, but she can't stop. This episode charts an addiction and a crash.

Nicola crosses the point of no return and becomes a police informer. She'll represent clients, while passing on the underworld's secrets to Victoria Police.

A drug house burglary smells of police corruption and a police informer is executed.