Overview
- Merseyside Police say they now hold a male DNA profile from the 1986 murder that does not match the national database.
- Voluntary screening in Merseyside, Swansea, Perth, London, Hull and Newcastle has eliminated 461 men, with results pending for 43 additional samples.
- Cellmark Forensic Services and the National Crime Agency are supporting a DNA-led inquiry focused on identifying the source of the profile.
- Crimestoppers is offering up to £20,000 for information given exclusively to the charity that leads to an arrest and conviction, with anonymity guaranteed and the offer closing on 22 April 2026.
- Detectives are appealing for witnesses who saw Diane on Borough Road around midnight or a man running from Bidston Hill days later, while the IOPC investigates misconduct claims linked to the original case.