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Investigation following complaints about police investigation into the murder of Nikki Allan

Factual summary of a published IOPC investigation, covering the incident, key findings and outcome.

All IOPC reports
Published
2024-01-16
Investigation type
independent
Force involved
Northumbria Police

What was investigated

The Independent Office for Police Conduct (IOPC) is investigating two complaints about Northumbria Police’s investigation into the murder of Nikki Allan in 1992. The complaints were submitted after David Boyd was convicted of Nikki’s murder in May 2023.

Key findings

  • Complaints referred by Northumbria Police.
  • David Boyd was convicted of Nikki's murder in May 2023.
  • Case remained unsolved for over 30 years after a failed prosecution in 1993.
  • Investigation will examine actions and decision-making of police.
  • Investigation will assess missed opportunities to identify David Boyd using DNA analysis.

Outcome

The investigation is ongoing and aims to thoroughly scrutinise the actions of police involved.

Read the full report on policeconduct.gov.uk

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Reviewed by the BlueLineHub Editorial Team
Last reviewed: 13 July 2026 · Next review due: 13 January 2027

This is a factual summary of a report published by the Independent Office for Police Conduct. Individuals are referred to exactly as the source report anonymises them. BlueLineHub is independent and not affiliated with the IOPC · Summarised 2026-07-13.