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May 27, 2025

The Exoneration of Peter Sullivan – The 1986 Murder of Diane Sindall

A Decades-Long Fight for Justice. A Murder Still Unsolved.

In the summer of 1986, the quiet town of Birkenhead, Merseyside, was shattered by the brutal murder of Diane Sindall, a 21-year-old florist with a bright future ahead. Her life was stolen in a violent, frenzied attack—bludgeoned to death and left in an alley—after her van ran out of petrol on a warm August night. The community reeled, demanding answers, and the police swiftly arrested Peter Sullivan, a quiet loner with no criminal past. Convicted on a coerced confession and now-discredited bite mark evidence, Sullivan was sentenced to life in prison, locked away for a crime he swore he didn’t commit.

For nearly four decades, Sullivan fought relentlessly to clear his name, while Diane’s family and the town grappled with lingering doubts. Was the real killer still out there? In 2025, a stunning breakthrough in DNA technology answered that question—exonerating Sullivan after 38 years behind bars and revealing the genetic profile of the true murderer, an unknown male still at large.

Now, as Sullivan walks free, the hunt for Diane’s killer intensifies. With Merseyside Police racing against time and a scarred community seeking closure, this gripping tale of injustice, resilience, and the relentless pursuit of truth will leave you breathless. Who killed Diane Sindall? The answer remains in the shadows—but the search is far from over.

A miscarriage of justice. A fight for freedom. A killer yet to be caught.

Ontario Cold Cases: Canada’s True Crime Podcast brings you the harrowing story of Diane Sindall’s murder and Peter Sullivan’s long road to exoneration—a chilling reminder that even in the coldest cases, the truth can still come to light.

Because every case deserves answers—and every victim deserves justice.

Subscribe now to Ontario Cold Cases: Canada’s True Crime Podcast. Episodes available wherever you get your podcasts.

Follow us for updates and more: @OntarioColdCases

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