Colin Stagg is the man wrongly accused of murdering Rachel Nickell on Wimbledon Common in 1992. He was acquitted in September 1994 after a judge excluded evidence from a police undercover operation; Robert Napper later admitted responsibility for Nickell’s death.
Stagg spent 13 months in custody awaiting trial. Although he left court without a conviction, public suspicion followed him for years before the Metropolitan Police formally acknowledged his innocence.
Why did police suspect Colin Stagg?
Rachel Nickell, 23, was killed on 15 July 1992 while walking with her two-year-old son and their dog on Wimbledon Common in south-west London.
Stagg lived nearby in Roehampton and regularly walked his dog on the common. Police received information about him following a Crimewatch appeal and believed he fitted an offender profile developed by psychologist Paul Britton.
There was no forensic evidence linking Stagg to the killing. Investigators nevertheless pursued him through an undercover operation intended to obtain incriminating statements.
In an interview published by the University of Law in January 2026, Stagg’s defence barrister, William Clegg KC, criticised the breadth of the profile used to target him. His account explains a central weakness in the investigation: fitting a description of a possible offender did not establish that Stagg had committed the crime.
What was the “Lizzie James” operation?
An undercover police officer using the name “Lizzie James” pretended to be romantically interested in Stagg. Through letters, telephone conversations and meetings, she encouraged discussions of sexual fantasies and attempted to draw him into admitting involvement in Nickell’s death.
Stagg did not confess to killing Nickell.
The operation is often described as a police “honeytrap”. That term refers to the officer’s use of apparent romantic interest to gain his trust. A later High Court judgment, which examined the earlier case, clarified that their relationship involved intimate correspondence and meetings in public places, rather than a physical relationship.
The distinction matters because a brief description of the operation can otherwise give a misleading impression of what happened.
Why was Stagg acquitted?
At the Old Bailey in September 1994, Mr Justice Ognall examined how police had obtained the undercover evidence. He condemned the attempts to manipulate Stagg and ruled that the evidence should not go before a jury.
Contemporary reporting by The Independent records that the prosecution then had no remaining case to present. A formal verdict of not guilty was entered.
Stagg’s acquittal was therefore not the overturning of an earlier conviction. He had been held on remand—custody while awaiting trial—and was never convicted of Nickell’s murder.
Nor did the ruling establish a blanket ban on undercover policing. The later High Court judgment distinguished the use of undercover officers in principle from the particular tactics employed against Stagg. The issue in his case was whether the resulting evidence could fairly be put before a jury.
How was Robert Napper identified?
Advances in forensic testing allowed investigators to re-examine material retained from the crime scene. Reuters reported that a partial DNA profile identified Robert Napper as a suspect in 2004, with further DNA checks establishing the link.
Napper was already detained at Broadmoor following convictions for other violent crimes.
On 18 December 2008, he pleaded guilty at the Old Bailey to Rachel Nickell’s manslaughter on the grounds of diminished responsibility. He was ordered to remain detained at Broadmoor indefinitely.
The precise court outcome was a manslaughter conviction, even though Nickell’s death is commonly referred to as the Wimbledon Common murder.
Compensation and the police apology
Stagg’s £706,000 compensation award was announced in August 2008, before Napper’s guilty plea that December.
On the day of Napper’s conviction, Metropolitan Police Assistant Commissioner John Yates publicly apologised to Stagg. Yates explicitly acknowledged that Stagg was completely innocent of involvement in the case and recognised the lasting damage caused by the investigation.
These were separate developments: the court acquitted Stagg in 1994, compensation followed in August 2008, and the formal police apology came in December 2008.
What happened to Stagg afterwards?
The consequences extended beyond his time in custody. In a 2012 interview with the Evening Standard, Stagg described the persistent public belief that he had escaped punishment on a technicality. The newspaper reported that he had accepted a separate settlement in the News of the World phone-hacking litigation.
His story was later portrayed in Channel 4’s 2021 drama Deceit, with Sion Daniel Young playing Stagg. The programme dramatised the undercover operation; it should be understood as a television portrayal rather than a court record.
Speaking to ITV’s Good Morning Britain in 2021, Stagg said he did not blame police for their mistake. That was his stated position at the time of the interview.
His case illustrates why acquittal and the restoration of a person’s reputation can be very different experiences. The prosecution ended in 1994, but the official acknowledgement that police had pursued an innocent man took another 14 years.
Sources
- The Independent: “Man freed as Nickell murder trial collapses”. Published September 1994; the page displays 14 September in US Eastern time. Contemporary reporting on the ruling and formal acquittal. The Independent
- High Court of Justice, judgment hosted by Statewatch: AKJ and others v Commissioner of Police for the Metropolis and others, [2013] EWHC 32 (QB). 17 January 2013; paragraphs 170–175 discuss the Stagg operation and evidence ruling. statewatch.org
- The University of Law: “The Wimbledon Common murder: William Clegg KC recalls shocking Police ‘entrapment’ tactics as a ‘unique’ aberration”. 13 January 2026. ULaw
- Reuters, published by Times of Malta: “Man guilty of notorious 1992 British killing”. 19 December 2008. Reporting on the DNA evidence and Napper’s guilty plea. timesofmalta.com
- The Guardian: “Colin Stagg wins £706,000 payout over Rachel Nickell murder charge”. 13 August 2008. The Guardian
- ITV News London: “Who is Colin Stagg? Man wrongly accused of Rachel Nickell murder”. Page dated 15 December 2021. Includes the Metropolitan Police apology and Stagg’s interview comments. ITV News London
- Evening Standard: “Colin Stagg’s ‘revenge’ as NoW settles phone-hack case”. 20 December 2012. The Standard
- Channel 4: “Interview with Sion Daniel-Young who plays Colin Stagg”. 6 August 2021.
