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Commander Cass produced a second report on 14 September 1979.
He believed he had identified the killer as one of Officers E, H, G , I , J and F. While he did not recommend their prosecution for murder, he did believe that three officers had conspired together to obstruct police, and called for them to be prosecuted.
Three weeks later, the Director of Public Prosecutions, Sir Thomas Hetherington announced that there would be no prosecutions.
It would be another 31 years before the report was made available to Blair’s family and to the public.