No i don't think he was guilty. His innocence was demonstrated by a third party confessing to the murder and that then "proved his innocence" and ruled him out as a suspect.
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When the case reached the Old Bailey Justice Ognall ruled that the police had shown "excessive zeal" and had tried to incriminate a suspect by "deceptive conduct of the grossest kind". He excluded the entrapment evidence and the prosecution withdrew its case. Stagg was formally acquitted in September 1994.
In July 2006, the Scotland Yard team interviewed a convicted sex killer for two days at Broadmoor Hospital in Berkshire.[24] The 40-year-old man diagnosed as a paranoid schizophrenic (and also as having Asperger syndrome)[25] had been held at the secure institution for more than ten years.[26]
Later reports revealed the man to be Robert Napper, the convicted killer of Samantha Bisset and her four-year-old daughter Jazmine, murdered in November 1993, 16 months after Nickell's murder.[27] On 28 November 2007, Napper was charged with Nickell's murder. He appeared at City of Westminster Magistrates' Court on 4 December 2007,[28] where he was remanded until another hearing on 20 December 2007.[29] On 24 January 2008, Napper pleaded not guilty to Nickell's murder. He faced trial in November 2008.[30]
On 18 December 2008, at the Old Bailey, Napper pleaded guilty to the manslaughter of Rachel Nickell on the grounds of diminished responsibility. Justice Griffiths Williams said that Napper would be held indefinitely at Broadmoor Hospital because he was "a very dangerous man". At the same time, Colin Stagg received a public apology from the police.
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Albertini - It may help your credibility if you were able to substantiate your assertions with accurate, rather than made up, examples. Although I can see that this may be tricky.
Although your increasingly shrill cries of "As I have already told you" when challenged on matters of fact are becoming a trifle tiresome for those who do actually have day to day practical experience of the law.
May I suggest "put up or shut up?"