The opening episode of Season Two unpicks the story of Yara Gambriasio, and the investigation into her murder. This is a story of how DNA was thought to lead to a suspect, but time and time again what appeared to be a promising lead, turned into false hope. But with methodical deductions and a steadfast determination, a killer was finally identified, thanks to the existence of a 10-year-old postage stamp.

Smoking Gun is a What's The Story original series, narrated by Romola Garai and Britain's best known forensic scientist Tracy Alexander. And is supported by the British Academy of Forensic Sciences.

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The Missing + is your home for the very best in true-crime podcasts. You can get early access to series, bonus episodes, ad-free listening and even exclusive series you can't hear anywhere else. And if you love the show, your subscription helps to fund the episodes.

As well as Smoking Gun, there's a whole collection of shows on The Missing +. From the stories of the most pivotal assassinations throughout history, to series' about long-term missing people, limited series about extraordinary conmen, and investigations into miscarriages of justice - The Missing + has you covered.

To accompany Season 4, we're launching a new spin-off show called 'Under The Microscope', which is exclusive to subscribers. In it, you will hear Smoking Gun host Tracy Alexander interviewing some of the brightest minds in the word of forensic science, and revealing exactly what they do.

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