In the Kirk Bloodsworth case five witnesses placed Mr. Bloodsworth with the victim. According to Wikipedia, "Two of the witnesses had not been able to identify Bloodsworth during the lineup but in fact saw him on television after the crime was committed.[3][4]"
We must also never underestimate the effect of duress in the identification of individuals by witnesses.
A case in point.
https://www.theguardian.com/uk/2008/dec/22/cardiff-three-perjury-law“The flawed conviction of the Cardiff Three revealed police techniques described by then lord chief justice, Lord Taylor, as "almost passing belief". It emerged police had used oppressive and bullying techniques in interviewing the suspects. "It is hard to conceive of a more hostile or intimidating approach by officers to a suspect," Lord Taylor said.
However, while the Cardiff Three were released after more than four years in prison, last week the witnesses whose false evidence helped to convict them each began 18-month prison sentences, despite the fact that it was not disputed that similar police tactics had been used against them.
Two of the witnesses, Vilday and Psaila, who at the time had also been prostitutes and who have been acknowledged as having been vulnerable, pleaded guilty to perjury. There was evidence that Vilday had been subject to particular pressure from police who convinced her to give evidence against the Cardiff Three, and that she was threatened with jail, losing custody of her young child, should she fail to give the evidence they sought.
The third witness, Grommek, contested the charge of perjury, pleading the defence of duress.
Despite the undisputed role of police bullying and intimidation - Gaon Hart, prosecuting, stating in court that "it is clear that the defendants were harassed into lying" - all three witnesses were convicted on the basis that duress was not available as a defence.“
Perhaps this is why Bryson, Fleming, Walsh, Janine Jones, Steven Kelly et al have never attempted to change their testimony? That they knew that a lengthy prison sentence may await them if they did? And explains Shane Mitchell’s reticence in court to testify to the truth.