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A missing woman. A brutal murder. And a confrontation with a prime suspect.

A young woman living in Glasgow goes missing in the night.

Police begin to prise open the secret sex lives of men across the country.

Disturbing night-time activity in a Glasgow cafe becomes a focus for the police.

The isolated forest where Emma's body is found offers clues.

A suspect comes forward asking for help, but can he be trusted?

The conflicting stories and evidence that point towards a man with a past.

Is this man Emma's killer? Sam confronts a prime suspect with her evidence.

The sexual violence reported, the promises made and the women who wait for justice.

A dramatic twist in the hunt for the killer. Those at the heart of the case come forward.

A decision with the most devastating consequences is made in the hunt for Emma's killer.

More victims contact Sam Poling. What they say changes the course of her investigation.

The man accused of killing Emma goes on trial where he chooses to take the stand.

After a nineteen-year wait for justice, we now know who killed Emma. But at what cost?