In episode four, Emily hears how new DNA testing techniques reveal a different man may have been at the crime scene and Andy explains a dilemma that prisoners who maintain their innocence face.

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Host: Emily Dugan, reporter at The Sunday Times.

If you have any information that you want to share on Andy's case or remember anything from the time, you can contact Emily Dugan directly on email: emily.dugan@sundaytimes.co.uk or by direct message on twitter: @emilydugan

Audio from HMP North Sea Camp courtesy of Two Step Films.

If you, or someone you know, has been affected by the issues raised in this episode, the following organisations can help:

Rape Crisis England & Wales

NHS - Help after rape and sexual assault

Criminal Cases Review Commission

Appeal - Charity and law practice

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