When Colette Aram went missing after setting off on the short walk to her boyfriends house there was immediate alarm. Detectives and her family searched through the night. But when morning came, and a body was discovered a short distance away, it was immediately obvious that there was a killer in the community. For decades, detectives searched for that man - spurred on by a DNA profile which they thought could belong to the killer. But it would take an extraordinary sequence of events to finally provide the clue which identified the most unlikely of murderers.

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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