For years, investigators believed they knew the voice of the Yorkshire Ripper.

The tape and letters became some of the most influential pieces of evidence in one of Britain's largest murder investigations. Detectives listened to them. The public heard them. Gradually, they became woven into the wider story of the case itself.

Then Peter Sutcliffe was arrested.

And something didn't fit.

In this episode, we explore the questions that emerged in the aftermath of his arrest. How had the investigation come to trust the tape? Why had certain assumptions become so influential? And what happens when an explanation that once felt convincing begins to unravel?

As detectives looked back across years of enquiries, interviews and missed opportunities, the Yorkshire Ripper investigation found itself confronting uncomfortable questions about certainty, understanding and the difference between seeing the truth and recognising it.

Because sometimes solving a mystery is only the beginning.

🎙️ Hidden Chronicles explores the moments where history, crime and human psychology collide.

🎧 Available on Spotify, Amazon Music, Audible and other major podcast platforms.

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