UK: DNA Evidence Frees Man After 38 Years in Prison for Murder

UK: DNA Evidence Frees Man After 38 Years in Prison for Murder
Above: Kim Smith, sister of Peter Sullivan, speaking to the media outside the Royal Courts of Justice, central London, on May 13, 2025. Image credit: Ben Whitley/Contributor/PA Images via Getty Images

The Facts

  • Peter Sullivan, 68, was acquitted on Tuesday after the Court of Appeal in London quashed his 1987 murder conviction, marking the longest miscarriage of justice involving a living prisoner in British legal history.
  • Sullivan was wrongfully convicted of killing Diane Sindall, a 21-year-old barmaid and florist, who was found murdered in an alleyway in Birkenhead, Merseyside, on August 2, 1986, after leaving her shift at the Wellington pub.
  • New DNA testing of preserved semen samples from the crime scene, made possible by recent technological advances, revealed a profile matching an unknown male attacker, definitively excluding Sullivan as the perpetrator.

Sources Split


The Spin


Narrative A

The criminal justice system failed catastrophically by relying on flawed evidence, including questionable confessions from a vulnerable suspect who was denied proper legal representation during police interviews. This case exemplifies how outdated forensic techniques and inadequate safeguards for vulnerable defendants can lead to devastating miscarriages of justice.

Narrative B

The prosecution's case was built on the best available evidence at the time, including circumstantial evidence and witness testimony, with technological limitations preventing the DNA analysis that would later prove crucial. The system has now demonstrated its ability to correct errors when new scientific evidence becomes available.


Metaculus Prediction

© 2026 Improve the News Foundation. All rights reserved.Version 7.18.0

© 2026 Improve the News Foundation.

All rights reserved.

Version 7.18.0