About this episode

The episode revisits Birkenhead after Peter Sullivan's release, focusing on Diane Sindall's murder and ongoing police investigations.

Returning to Birkenhead in the wake of Peter Sullivan’s release, we focus on Diane Sindall and the community still living with her murder. Peter shares details of his arrest, interviews and alleged police pressure, alongside renewed police enquiries that revisit overlooked witnesses and potential suspects. As officers collect fresh DNA and old memories resurface, the search begins anew for the man known only as 'Unknown Male One'. Presenter: Olivia Graham. Producers: Kate Bissell, Gemma Maull and Olivia Graham. Sound Design and Music Composition: Phil Channell. Mixing: Ivan Eastley. Story Consultants: Neil McCarthy, Jack Kibble-White and Kirsty Williams. Online Producer: Rachael Smith. Development was by BBC Audio Scotland and BBC Merseyside. Executive Editors: Gillian Wheelan and Ben Anderson. Commissioning Editor: Alistair Miskin. There’s graphic descriptions of violence in this series. For details of help and support in the UK, visit bbc.co.uk/actionline.

People in this episode

Host: Olivia Graham

Topics covered

• true crime
• murder investigation
• community impact
• police procedures
• DNA evidence

Keywords

• Birkenhead
• Peter Sullivan
• Diane Sindall
• murder
• police investigation
• DNA
• community

Mentioned in this episode

Organizations: BBC Audio Scotland, BBC Merseyside, BBC Sounds, Gillian Wheelan, Ben Anderson, Alistair Miskin

More episodes of Crime Next Door

• The Beast of Birkenhead: 7. The Profiler · May 31, 2026 · 28 min
• The Beast of Birkenhead: 5. Unknown Male One · May 17, 2026 · 28 min
• The Beast of Birkenhead: 4. The Wrong Fella · May 10, 2026 · 25 min

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