5: Private Passions

Young Welshman Gareth Williams was found naked inside a relatively small bag in his bath in 2010. And another theory is that he was the victim of a bizarre sex game gone wrong. There are suggestions he may have had an interest in Claustrophilia - pleasure derived from being in a confined space. But how much evidence is there? Here Dr Sian Williams looks at what we know and don't know about Gareth's private life.

Death of a Codebreaker is presented by Dr Sian Williams with contributions in Episode 5 from James Pepper, Ashley Byrne, Tracy Cardwell and Wayne Wright. Producers: James Pepper, Ashley Byrne and Wayne Wright The Executive Producer is Ashley Byrne.. Music by Robin Forrest The Sound editor: Kevin Bailey Death of a Codebreaker is an MIM Production for BBC Sounds and BBC Radio Wales.